bluuebunny/crossref_metadata_2025 huggingface dataset:
Uncertainty Quantification for a Flapping Airfoil with Chordwise Flexure
Authors: Zhao Liang Yu , Xing Cheng You , Zhang Xia Qing
Published: August 2011

The uncertainty quantification for a flexible flapping airfoil was investigated using the point-collocation non-intrusive polynomial chaos method. The chordwise flexible amplitude was assumed to obey a normal distribution. It is observed that the time-averaged thrust coefficient obeys a Gauss-like but not the exact Gauss distribution, while the probability of the propulsive efficiency is much different from the exact Gauss distribution. The effect of the chordwise flexure on the time-averaged thrust coefficient is much larger than the effect on the propulsive efficiency. This work could be a preparation for the robust design of a flexible flapping wing with respect to a stochastic chordwise flexure.
Finite Element Simulation of High-Speed Hard Turning
Authors: Du Guo Chen , Chen Ying , Zhang Jin Feng , Wei Zhi Zhen
Published: August 2011

The results reported in this paper pertain to the simulation of high speed hard turning when using the finite element method. In recent years high speed hard turning has emerged as a very advantageous machining process for cutting hardened steels. Among the advantages of this modern turning operation are final product quality, reduced machining time, lower cost and environmentally friendly characteristics. For the finite element modelling a commercial programme, namely the Third Wave Systems AdvantEdge, was used. This programme is specially designed for simulating cutting operations, offering to the user many designing and analysis tools. In the present analysis orthogonal cutting models are proposed, taking several processing parameters into account; the models are validated with experimental results from the relevant literature and discussed. Additionally, oblique cutting models of high speed hard turning are constructed and discussed. From the reported results useful conclusions may be drawn and it can be stated that the proposed models can be used for industrial application.
A Self-Control Assembly Machine Based on Vision System
Authors: Li Wei Hua , Lian Hai Shan
Published: August 2011

Based on the special-shaped spring assembly of thermostat, a corresponding pickup fixture can be designed to ensure parts in a unique state in displacement process. The digital position control and machine visual identification technology are adopted for picking up part and then taking it into plastics casing riveting through the way no contact accurate positioning and control. The problem of the location of special-shaped small parts has been Solved in the thermostat assembly process. The process automation in thermostat assembly has been realized and production efficiency has been improved.
Modeling and Simulation of Aircraft on Ground Deicing Fluids Deicing Process Based on Thermal Consumption
Authors: Chen Bin , Xing Zhi Wei , Wang Li Wen
Published: August 2011

The deicing process and practical model of aircraft on ground were introduced, and the thermal consumption was discussed. Deicing fluids deicing model of the aircraft on ground was founded based on thermal consumption. The simulation results indicated that the proposed model was effective to analyze and simulate the aircraft on ground deicing process.
Turbulence Model Influence on Numerical Investigation of Transonic Axial Compressor Rotor
Authors: Xie Fang , Liu Chang Jiang , Wang You Jun
Published: August 2011

Numerical method using HI and HOH meshing combined B - L turbulent model and S - A turbulent model separately based on the Rotor 37 compressor Rotor was applied to the steady flow. results on pressure characteristic curve, stall point forecast etc were compared with related experimental data. This paper discussed calculation precision influenced by the turbulence model and numerical computation grid. This numerical investigation was basis for subsequent compressor internal flow field study.
A Knowledge-Based Conceptual Design Support System
Authors: Engida Woldemichael Dereje , Hashim Fakhruldin Mohd , Debnath Sujan
Published: August 2011

Conceptual design process is considered as the most critical and important phase of product design process. It is the stage where product’s fundamental features are determined, large proportion of the lifecycle cost of the product is committed, and other major decisions are made, which have significant impact on the downstream design and related manufacturing processes. It is also a knowledge intensive process where diverse knowledge and several years of experience are put together to design quality and cost effective products. Unfortunately, computer support systems for this phase are lagging behind compared to the currently available commercial computer aided design (CAD) tools for the later stage of design. This paper proposes a knowledge-based conceptual design support system in which design concepts from existing products and previous experiences are captured and used to design future products. The conceptual design support system will assist designers during the conceptual design process by generating concepts on a morphology chart and handling some of the repetitive tasks. In addition, the generated concepts may inspire designers to generate new concepts. The design support system addresses the key features of conceptual design process such as functional analysis, concept generation and concept evaluation with aid of the production rules within the knowledge-based system.
Individualized Modeling of the Femoral Head Based on Reverse Approach
Authors: Liu Bin , Huang Zhi Huan , Zhu Ya Nan
Published: August 2011

In order to obtain the optimal model of femoral head prosthesis, a novel modeling method is proposed in this paper. It can revert the necrotic femoral head into the satisfactory model that primely matched with the acetabulum. This new method not only affords a theoretical model for the accurate operation position fixing in orthopaedic clinic, but also provides an innovative practical means for the individualized manufacturing of artificial femoral head prosthesis. Two male sufferers with different femoral head necrosis extent were chosen as the experimental subject for the prosthetic modeling simulation. The prosthetic models highly presented the primary shape of the femoral heads.
Modeling and Designing of Urban Traffic Control Systems by Statecharts
Authors: Huang Yi Sheng , Liao Tso Hsien
Published: August 2011

Statechart has been utilized as a visual formalism for the modeling of complex systems. It illuminates the features on describing properties of causality, concurrency and synchronization. The reachability structure is used to represented dynamic model by a Boolean function. In this paper, we try to describe State invariant method and equation function for hierarchical tree diagram. Finally, we used them to analyze the urban traffic control systems which are modeled by using Statecharts. Their formalism provides a concept of propositional logic for presenting control strategy.
Reverse on the Spiral Bevel Gear’s Teeth Profile Line
Authors: Wang Chun Xiang , Zhang Jing Qiang , Liu Zhi Jun
Published: August 2011

For the purposes of spiral bevel gears of cycloid gear is more and more extensive, the research on the reverse are rare phenomenon, this paper puts forward a reverse method: It’s based on three coordinates measuring system for prolate epicycloids’ bevel gear teeth profile. This method according to the forming principle of the spiral bevel gear tooth profile, with the back cone expanding the measured data of a group of good quality after simple processing, according to the involutes’ parameter equation for theoretical analysis, reverse out the base circle radius and modulus, make the bevel gear tooth profiles to reverse.
Experimental Study on a New Suction Inlet Realizable for Uniform Thickness Collection
Authors: Chen Si Lin , Yang Xu Dong , Qiu Shi , Ma Chun Lin , Chen Tao , Yang Dan , Yang Huan
Published: August 2011

The numerical simulation of flow field of a new rectangular suction inlet installing guide plates with different rake angles was carried out by means of the K-ε turbulence model based on the Fluent hydromechanics calculation software. And that the influences of different rake angles of the internal guide plates on the flow field were analyzed. Consequently, the optimal rake angle of 45° was defined at last. Finally, the practical rectangle suction inlet, according to the numerical simulation results, was developed by installing internal guide plates with the optimal rake angle, which optimizes the distribution of internal and external flow field and improves the average side velocities of flow. Practical test results indicate that the new rectangular suction inlet could realize the uniform thickness collection to achieve the smooth work surface when collecting the bulk materials.
A Business Integration Model Used in Collaborative Engineering Design
Authors: Wei Li Fan , Zhang Huai Yu , Li Jia
Published: August 2011

Collaborating among engineers is very important in modern design of complex system. A Information system is usually used to help engineers to get the basic information for product design flexibly and officially. But the gap of different system blocks the information transmitting, and interrupts the process of business flow. A Business Integration Model based on XML exchange file is discussed in this paper. It is conceived to help engineers working on engineering design transmit information and arose process between different application systems.
Chemical Constituents of Plumbago Zeylanica L.
Authors: Ming Yong , Wang Jing , Yang Jin , Liu Wei
Published: August 2011

To investigate the chemical constituents from the Plumbago zeylanica L. the chemical constituents were isolated by various column chromatographic methods and their structures were elucidated as plumbazeylanone(1),plumbagic acid(2),β-sitosterol(3),lupeol(4),lup-20(29)-en-3,21-dione(5),norcanelilline(6),3-O-glucopyranosyl plumbagicacid methylester(7),uridine(8),daucosterol(9).Compound 4-6 and 8 were first time were isolated from this plant for the first time.
The Optimization of Edge-Shape Parameter for Curve-Edge Milling Insert Based on Thermal-Mechanic Coupling Physical Field
Authors: Sun Bao Jun , Fang Xi Wu
Published: August 2011

The edge shape of milling insert has important influence on the heat loading and mechanical loading during metal cutting. The optimization of edge-shape parameter for curve-edge milling insert based on evaluation criteria of thermal-mechanic coupling field was carried out in order to improve the thermal-mechanic coupling field and to raise lifetime and production rate of milling insert. A new edge shape function was obtained. The curve-edge milling insert was designed driven by the edge function. The coupling field of milling insert has obvious improvement by finite element analysis (FEM). The maximal equivalent stress and displacement in cutting deformation area decreased by 17.2% and 15.7% respectively.
Subsystems Change Ranking Methodology (SCRaM) for Complex Product Redesign Process
Authors: Romli Fairuz Izzuddin , Cheang Kian Hou , Chew Jun Xian , Rafie Azmin Shakrine Mohd
Published: August 2011

Product redesign is hardly a straightforward process, especially for complex products. The existence of intricate interrelationships between different components of product design architecture makes it more susceptible to change propagation phenomenon. In this case, redesign risk is not easy to predict since the change effects are being propagated to other components from the initiating change component. Because of this condition, choosing the right initiating change component is essential to control redesign process risks, apart from being able to successfully satisfy the product requirements. With this notion, this paper proposes a method that systematically ranks all components of an existing product design based on their estimated redesign risk. By having this information, designers can make a better redesign planning. The demonstration of this method is presented through an example aircraft redesign case study.
Vehicle Active Suspension with Four-Degrees of Freedom of Optimizing the Value of K Based on Genetic Algorithm
Authors: Zuo Yan Yan , Yan Cai Bao , Yang Nan
Published: August 2011

A vehicle active suspension model with 1 / 2 ，four-degrees of freedom is established and by combining genetic algorithm with optimal control theory，the author presents a new control method of active suspension that is to optimize the value of K controlled by LQG in default of road input based on genetic algorithm and makes a simulation in the environment of Matlab / Simulink. By simulation and analysis，the result indicates that，this method has an obvious effect on improving comprehensive performance of vehicles，such as ride comfort and operate stability and so on.
Performance Study of Photovoltaic Semiconductor Cooling Box
Authors: Dai Yuan De , Liang Xiao Ying , Du Hai Cun
Published: August 2011

A prototype of photovoltaic semiconductor cooling box was designed based on the demand of energy saving and environmental protection. This paper presents the composition and working principle of the prototype. The data of the lowest internal temperature of the cooling box was gained by measuring the actual operational performance of the system at different ambient temperatures. And according to the experimental results, the coefficient of performance of the system was derived. The obtained results showed that the minimum air temperature inside the cooling box can be maintained within 6~10°Cand the coefficient of performance can reach up to 0. 28~0.32 in the hot summer days.
Design Analysis of a New Transmission Device for High-Speed Precision Micro-Shafting
Authors: Li Wei , Zhou Zhi Xiong , Song Tie Jun , Xiao Hang
Published: August 2011

This paper presented a new transmission device for high-speed precision micro-shafting, which consists of an elastic shaft coupling and a collet, both which are integrated with the drive shaft, and a clamp ring, and meanwhile accomplished the detailed structure parameters design calculation by theoretical analysis and simulated computation with an application to an ultra-high speed micro-spindle, which shows the transmission device rational and feasible.
The Concept of Green Design Reflected in Design and Use: A Case Study on Japanese Design
Authors: Zhang Shi Yue , Wang Er Lei
Published: August 2011

Due to resource scarcity and worsening pollution on the environment, more and more people are attracted by green design. Some designs not only focus on energy saving, but also attach great importance to conveying green concept. Based on the case study of Japanese design and focusing on three aspects, material selection, structural design and style orientation, this article attempts to analyze the design works that reflect prominently the green concept. Therefore, people can deeply sense and appreciate the concept of environmental protection and eventually are beneficial educated and directed.
Load Distribution of Straight Beveloid Gears with Parallel Axes
Authors: Liu Qiang , Wang Jia Xu , Yu Bei Li , Xiao Ke
Published: August 2011

An approach for the analysis of tooth contact and load distribution of straight beveloid gears with parallel axes is proposed. The approach is based on application of influence coefficient method that accommodates the influence of contact deformation and tooth deflection. Computer program has been written to calculate the distribution of pressure. Results have been analyzed and validated by comparison with studies carried out by the finite element method with the aid of ANSYS general purpose computer program. Suggestion has been given to minimize the drawback generated by stress concentration.
The Review of Photovoltaic Power System and Chaos Phenomenon
Authors: Zhou Xue Song , Li Jin , Ma You Jie
Published: August 2011

This article introduces the composition and classification of Photovoltaic power system, makes Photovoltaic Grid Power System as an example, and Research the problem that is met in the grid operation process—Chaos Oscillation. For Chaos Oscillation problem in the Photovoltaic Grid Power System, paper elaborates conventional control method on Chaos, comes up with the theory that is applied to control method in Chaos Oscillation using Feedback Linearization to design a tracking controller to make Chaos Oscillation disappear in Photovoltaic Grid Power System.
Vibration Analysis and Simulation of Siemens-Schottel Podded Propulsion
Authors: Zhang Gui Chen , He Ji Qing
Published: August 2011

In order to study Siemens- Schottel- Propulsion (SSP) vibration for the marine electrical propulsion system, the SSP vibration analysis has been carried out in this paper. SSP suffers from harmonic vibration and torsional vibration of propeller and wave flow random disturbances. Vibration mode superposition method is applied to SSP vibration model. The SSP dynamic model has also been established based on SimMechanics. The simulation results show that the proposed way is important to forecast and prevent SSP vibration and to provide for the SSP management.
Influences of Cylinder Speed-Change Mechanism Parameter for Processing Property on High-Speed Comber
Authors: Ren Jia Zhi , Jia Guo Xin , Zhang Li Bin
Published: August 2011

In order to resolve the contradiction of cylinder, nipper and detaching roller in movement coordinate on high speed comber, use elliptic gear transmission make cylinder turn changeably. Use MATLAB software calculates and simulates the angular displacement, angle velocity and angle acceleration of cylinder speed change movement. Then technological parameters such as the timing of combing with cylinder speed change, and the timing of the last row of needle on cylinder through detaching roller are analyzed. The results show: cylinder transmission mechanism by the style of elliptic gear can achieve short time of cylinder combing, increase time of preparing of detaching and lapping and time of lap raise end. Meanwhile the last row of needle on cylinder passes detaching roller earlier, cylinder catches away reversed combed web from detaching roller is effectively avoided.
Research on Sand Collecting Mechanism’s Flanks of a New Railway Sand Removal Vehicle Based on CAE Method
Authors: Cui Zhao Xia , Guo Si Jia , Qin Jian Guo , Yang Tao , Hou Shou Quan
Published: August 2011

High-property carbon refractories for blast furnaces should have high thermal conductivity and excellent porosity characteristics. The relationship between porosity characteristics and thermal conductivity of different graphite size (100mesh, 200mesh, 325mesh, 600mesh and 100mesh respectively) containing carbon refractories was investigated by using mercury porosimeter and laser thermal conductivity instrument. The results indicate that the thermal conductivity was reduced with the increase of porosity and <0.1μm pore volume as well as the decrease of mean pore diameter under the same condition, which was related to the short of thermal conductive route.
Research on Kinematics Simulation and Analysis of 6 Revolute Joint Serial Industrial Robot
Authors: Li Ke , Li Duan Neng , Kong Ling Lin
Published: August 2011

Industrial robots are getting more and more applications in modern automated production, it’s a strong support to the development of manufacturing industry. Nowadays many domestic enterprises begin to do the robot R&D. We use mathematical software Matlab to make kinematics simulation of IRB1410 robot and succeed in verifying the justifiability of kinematics analysis.
Analytic Method on Vibrate Induced Noise of Engine Block
Authors: Zheng Guang Ze , Ohta Kazuhide
Published: August 2011

Numerical prediction of the acoustic radiation of vibrating engine block is conventionally based on the boundary element method (BEM). This approach yields good predictions, provided that the dynamic behavior of engine block is well established. However, interior resonances may lead to singular matrices and nonunique solution. To avoid the problems with interior resonances and singular matrices, this paper introduced the combined Helmholtz integral equation formulation method (CHIEF METHOD). The numerical experiment shows the performance of CHIEF METHOD and then we use this method to estimate the acoustic radiation of engine block. Based on spatially mean square velocity and acoustic radiation efficiency of vibrating engine block, a simplified analytic method is presented in this paper, by which the vibrate induced noise can be predicted in the early design process of engine development.
Dynamic Analysis and Simulation for a Bionic Intervention Robot
Authors: Liu Cun Xiang , Zhang Jun Hui , Zhao Da Xu
Published: August 2011

This paper deals with the kinematics and dynamics of a novel bionic micro-robot based on the gastropod's locomotion principle. Profit from using friction control module, this robot has the ability to run smoothly in the biological lumen with impulsive flowing liquid. The locomotion principle is verified by experiments, on this basis, a mechanical model using space operator algebraic (SOA) method has been established to analyze the robot's kinematics and dynamics in different environments by mission simulation. Tests and simulations provide strong proofs for the structure design and motion control of the robot.
Design Study of Prestressed Uplift Cast-in-Place Pile
Authors: Liu Xi Yuan , Zhang Xiao Yue , Li Xin , Zhang Ming , Zheng Xiu Juan
Published: August 2011

In foundation, crack width of uplift cast-in-place pile will exceed the limit of code. Reinforcement of piles has to be increased and sometimes the diameter of piles also needs to increase. Thus, reinforcement and crack control of uplift cast-in-place pile and prestressed uplift cast-in-place pile are analyzed by simulation design for the actual working condition. The calculation results show that prestressed uplift cast-in-place pile can not only decrease reinforcing area, but also control effectively the crack width of concrete in pile.
Characteristics Analysis of Noncontact Spinning Mechanism with Numerical Simulation
Authors: Sun Feng , Jin Jun Jie , Oka Koichi
Published: August 2011

This paper analyzes the spinning characteristics of a noncontact spinning mechanism with numerical simulation. In this mechanism, when the suspended object is stably levitated in the vertical direction by a magnetic suspension system, the disk magnets spin the suspended object in the horizontal direction by means of the remanent magnetization on the surface of the suspended object. The disk magnets are arranged around the levitated object, and the magnetic poles are arranged in a parallel configuration. In this paper, the mechanism is introduced, and the remanent magnetization on the surface of the suspended object is examined using a gauss meter. A numerical model is set up, and the spinning characteristics are analyzed with a step input and its velocity in steady states conditions using different numbers of magnets.
The Anti-Vibration Ability Research of the Straw as Shock Isolation Layer
Authors: Zhang Chao , Chen Rong Jun , Fang Wei Feng
Published: August 2011

Choose wheat straw, corn straw and thatch as the shock isolation layer materials, the static state function and the dynamic state mechanics function experiment have been made to them. This article also analysis the influence of anti-vibration ability by elastic modulus and water saturation rate under the same layer thickness.
Effects of Aging and Temperature on the Oriental Growth of Hydroxyapatite
Authors: Yang Hui , Huang Fei Fei , Xu Ke Wei
Published: August 2011

In order to find a simple way to prepare oriental HA, only by controlling the preparation conditions, a co-precipitation method was used to prepare an oriented HA. The influences of temperature and aging on its directional growth were investigated kinetically and thermodynamically. The chemical composition was characterized by X-Ray diffraction and Fourier transform infrared. The morphologies were observed by scanning electron microscopy (SEM). The oriented parameters of HA (c/a) were calculated by Scherrer equation. The results show that the temperature rise in the process of synthesis, aging or calcining inhibited the growth of HA crystal in the direction of c-axis. Aging for 24 h benefited the growth along c-axis, whereas aging for 36 h was in favor of the decreasing of the c/a value. The supernatant-replacement during aging exerted the same effect on the growth with the rising of temperature. The SEM analysis result shows that the morphology of the produced HA particles looked like a uniform needle shape and had a good dispersion.
Simulation and Analysis of Dynamical Transmission Precision of 2K-V Cycloid pin Gear Reducer Based on Multi-Body System Dynamics
Authors: Zhu Bin , Qin Wei , Liu Jin , Fu Yuan Lei
Published: August 2011

The dynamic model of multi-rigid-body system and rigid-flexible coupling system of 2K-V cycloid pin gear reducer are constructed with ADAMS, the output-angle error curves are obtained by multi-body system dynamic simulation, and the influence of elastic deformation come from planet gear, cycloid gear and pin gears on the transmission accuracy are analyzed. The work this paper introduced provides a useful approach for further study on the dynamic transmission accuracy of precision gear drive system, exploration of active control technology for the transmission accuracy and improvement of structural design for the gearing.
The Study of Holonic Control Strategy in Modern Automobile
Authors: Lei Qiong Hong
Published: August 2011

The popularity of modern automobiles requires better using performances of them, even better security and environmental protection. So, there are some electrically controlled equipment used in a modern automobile. Since this, it is urgently necessary to develop an integrated or synthetical control strategy in automobiles by using new technologies and advanced algorithms. In this paper, a new method based on the holon conception is presented to study the synthetical control in automobiles [1-3]. The control system is divided into three levels and is defined as three holons, and the function of every holon level is discussed. The coordinated model is established to study the coordination strategy among different holon levels, which will help to improve the synthetical control efficiency, security, stability and environmental protection and etc. of modern automobiles [4-5].
CFD Analysis of Engine Water Jacket and it’s Optimization
Authors: Liu Chuan Bo , Zhang Cheng
Published: August 2011

In order to research the cooling performance of engine water jacket, the CFD method and the software Fluent were used to analyze and optimize the capability. After building and meshing the three-dimensional jacket model, the coolant flow distribution and heat transfer coefficient distribution in jacket were obtained by simulating, and the deviation between simulation results and experimental data dose not exceed 5.3%. The current imbalance problem of heat transfer in water jacket was studied, and an optimization scheme was proposed according to the analysis of flow distribution in each cylinder water hole. The result of optimization program analysis and comparison indicates that the water jacket cooling performance has been significantly increased, the overall structure of water jacket is more reasonable, and these make engine get better cooling.
Based on the ANSYS Software to Research Lasers Coating Applied with the Ho-Type Cutting Pick
Authors: Xu Nan Nan , Mao Ping Huai , Zhai Bing
Published: August 2011

Based on the ANSYS Software the Ho-type cutting pick of Spiral Drum Shearer applied lasers coating is feasible analysis. At first the paper describes the Spiral Drum Shearer’s overall body and elicit to its traditional materials. Then analysis the head of Cutting pick’s traditional materials in order to apply with lasers coating. Then simulate it and Fatigue calculation by ANSYS Software. By analysis of the coating pick is found that the Cutting pick’s life can develop well. So it has a nice economic Potential.
Modal Analysis of Prestressed Spindle Component Based on Workbench
Authors: Li Hong Wei , Zhang Jian Bin
Published: August 2011

The natural frequencies and deformation of the prestressed spindle component assembly are separately analyzed by means of ANSYS workbench software in this paper. The results show that the structural parameters have large influence on spindle inherent frequency, it is important to optimize the design structure to make the inherent frequency of the spindle away from work frequency.
Equivalent Static Loads Method for Flexible Structural Shape Optimization
Authors: Zhang Wei , Sun Chuan Qiong , Wang Huan
Published: August 2011

Study on the flexible structural shape optimization problem under dynamic loading conditions. The dynamic loads are transformed to equivalent static loads (ESLs), and then the static response optimization can be used for dynamic response optimization. A structural shape optimization model, which has been established by ESls method, is utilized to design the flexible components in the multibody dynamic system. A shape optimization for a four-bar linkage had been generated by using the ESLs method, and the results indicate that there are noticeable improvements in the total mass and the maximum stress.
Study of the Injury Analysis and Safety Design Improvement of the Bus in the Typical Position
Authors: He Chao , Zhang Xiao Yun
Published: August 2011

In emergency braking conditions, because of a large acceleration, the passenger will lose his balance to come in collision with the bus bodywork. In some typical positions, without the side effect of seat belts or baffle, the key parts of a passenger body will come in direct collision with the bodywork internal, even to be accompanied with secondary collision, which causes a great threat to human’s life safety. This paper cares for the front bus position. Based on the collision simulation between the model of child passenger and the bodywork structure, by analyzing the initial point of impact, secondary point of impact and other key information, and combining the damage indicators-time curve of the collision of the dummy model which determines the peak injury index of a passenger, the injury in emergency braking situations can be simulated. According to the pattern and level of injury imposed on the body of a child, an improvement can be proposed for the design of the internal structure of the bodywork. The simulation after improvement of design shows that the head HIC value of a child dummy has a great reduction compared with before. So this improvement can fully reduce the risk of injury of children passengers.
Derivative-Free Hybrid Optimization Method for Top Design of Satellite System
Authors: Chen Ying Guo , Lu Shuai , Liu Xiao Lu , Chen Ying Wu
Published: August 2011

This paper combines a derivative-free hybrid optimization algorithm, generalize pattern search (GPS), with Treed Gaussian Processes (TGP) to create a new hybrid optimization algorithm. The goal is to use the method for top design of satellite system, in which the objective or constraint functions usually are computationally expensive black-box functions. TGP model partitions the design space into disjoint regions, and employs independent Gaussian Processes (GP) in each partition to represent the time consumption of true problem responses. Utilizing the TGP, we generate the new “promising” points, which are the combination of model-predicted values and estimated model errors. Then, these points are used to guide GPS search in the design space efficiently. The hybrid optimization method is applied to top design of multi-satellites cooperated observation. The results demonstrate that the proposed method can not only increase the chance of obtaining optimal solution but also cut down the cost of function evaluations.
The Prediction for the Residual Life of Waste Drive Axle Housing Basing on Neural Network
Authors: Song Shou Xu , Zhao Ji Ru , Liu Tao
Published: August 2011

In order to estimate the residual life of waste drive axle housing, the prediction model of waste axle housings with artificial neural networks is built in this paper. Take the deformation, residual stress and the gradient of magnetic intensity Kmax relating to axle housing’s fatigue damage degree as the input of neural network, and compare the testing residual life of the waste drive axle housing with its predicting residual life. The result demonstrates that: the deformation, residual stress and the gradient of magnetic intensity Kmax of axle housing as the characteristic parameter estimating the degree of fatigue damage, adopting trainbr training function can get good network performance and comparatively high precision of prediction. Besides, the longer the residual life of the waste axle housing is, the more precise the prediction life will be.
Initial Imperfection Simulation and Effect on Shear Buckling of Corrugated Steel Webs
Authors: Song Jian Yong , Yu Ya Mei , Zhang Shuo
Published: August 2011

The nonlinear shear buckling of corrugated steel webs is completed by ANSYS. Consistent mode imperfection method is adopted for simulating corrugation configuration imperfection of corrugated steel plate, shear buckling calculation analysis result shows that ultimate shear buckling load of corrugated steel webs is decreased with increasing in corrugation configuration imperfection. Analysis results shows that oversized corrugation configuration imperfection will decrease the ultimate shear buckling load of corrugated steel webs, but premature buckling caused by steel plate thickness imperfection of corrugated steel webs is much better than plain steel webs, and the ultimate shear buckling load and buckling mode will not be much effected by such steel plate thickness imperfection. On this basis, the influences of corrugation configuration to ultimate shear bucking load and buckling mode are investigated.
CNC Lathe Circular Interpolation Principle and Technological Parameters Research and Positive and Negative Arc Running Direction Analysis
Authors: Huang Tian Biao
Published: August 2011

Compiled nc programs, perfect quality parts processing of nc machining process, is compiling personnel, nc machining operation personnel most concern. This paper discusses correct understanding circular interpolation principle and processing technology analysis[1]; When the manual programming how correct establishment self-positioning presended car parts, accurate discriminant number of circular interpolation instructions as an example, this paper expounds the direction of running direction accurately arc discriminant method, remove programming staff for professional too strong and difficult to understand the confusion generated.
Study on Application of the New-Typed Metal Ceramic Composite Coating in the CFBB at High Temperature
Authors: Sun Hong Fei , Wang Gang , Wang Can Ming , Tian Qi Fa
Published: August 2011

In this article, the working conditions and the failure mechanism of the four tubes in Boiler have been studied. On the base of these researches, a new kind of Fe-based/Cr3C2/B-Fe cored wire was designed. And arc spraying technology was used to produce coatings which had high performance and price ratio. The results of test show that the cored wire was easy sprayed with arc spray equipment. The coatings have dense microstructure, good bond with substrate, and excellent wear-resistance and corrosion-resistance at high temperature.This coating can prolong the using life of heated tubes of circulating fluidized bed boiler effectively and is worthy to be widely used in industry.
GTWZ-6012 Type Aerial Work Platform Hydraulic Legs of Stress Analysis and Calculation
Authors: Zhang Ke , Huang Xiao Zheng , Chen Jian Ping , Wang Jin Fang
Published: August 2011

The 6012 type aerial work platform is mainly used in the construction of steel structure occasions, and the overall and local stability of the studies to ensure construction safety and reduce accidents are of great significance. In this paper, I apply finite element analysis software ANSYS to model the hydraulic legs, and conduct static structural analysis of the hydraulic legs for 6012 type aerial work platform. At last, I will calculate the maximum deformation of single hydraulic legs and maximum stress of the situation in the maximum stress conditions, compared with the theoretical values and the actual test results.
Structure and Properties of Ti55Al45 Alloys Prepared by Mechanical Alloying and Spark Plasma Sintering
Authors: Liu Yao Dong , Xing Jing , Ai Di , Jin Song Zhe
Published: August 2011

Amorphization and crystallization behaviors of Ti55Al45 powders during mechanical alloys (MA) and subsequent Spark Plasma Sintering are studied. It is found that the nanocrystallization process of the Ti-Al alloy proceeds and the sintering temperature can control the microstructure of alloy. The sintering of the compacts is carried out at the temperatures of 1100—1200°C with a compaction pressure of 30MPa and a heating rate of 30°C min-1. Specimens with high densities and approaching the equilibrium state can be obtained in short time of 180s by spark sintering than conventional sintering. Such shorter high temperature is important to prevent grain growth. The microstructures of the alloy contains equiaxed gamma TiAl with sub-micron grain size and small amount alpha Ti3Al phase.
A Form-Oriented Innovative Product Design Approach
Authors: Yang Sui Xian , Li Ting , Li Xiao Jian
Published: August 2011

Form innovation is a particular field in innovative theory and design methodology. In order to develop creative thinking and obtain innovative product form, it has been put forward in this paper that an effective and systematic design approach based on the features of form design. According to this method, form innovation is subdivided into innovation in functional attribute and visual style. Therefore, product innovative design can be implemented smoothly and efficiently by combining the effective innovative tools and the creative thinking. A case study, chair innovative design for fast-food shops, has been conducted to demonstrate the effectiveness of the approach proposed in this paper which will stimulate and systematize the creative thinking.
Elastic-Kinematics Analysis and Numerical Method for Five-Rod Suspension
Authors: Lu Mo Wu , Zhao Wei Qiang
Published: August 2011

This paper presents a numerical method for elastic-kinematics analysis of five-rod suspension based on displacement matrix method and spatial body equilibrium theory. A mathematical model for elastic-kinematics analysis of five-rod suspension is established and equilibrium equations of suspension are derived. The method for calculating equilibrium location of suspension when counterforce of road surface acts on the wheel is discussed on the precondition of considering the influence of the elasticity of each kinematic pair on suspension and not considering it. This method simplifies the solving process of elastic-kinematics analysis of five-rod suspension and is efficient especially for computer-based solving process.
Representing the Evolving Design Rationale to Support Design Reuse
Authors: Liu Ji Hong , Hu Xu Jie
Published: August 2011

Engineering design is an innovative process that relies heavily upon associations to past experience and similar designs. Design rationale (DR) explains why an artifact is designed the way it is. An explicit representation of DR can bring many benefits to understand, modify, or reuse a design. This paper argues that because the design is a cognitive activity continuously iterative and evolving, the conventional argument-based representation of DR has some inherent limitations. An intent-driven representation model is created to capture and formalize the evolving DR. The DR elements and their interactive relationships are defined. Furthermore, two methods to reconstruct the DR model, namely the structure-based clustering and the context-based extraction, are explored to reduce the complexity of the model and to support effective DR traceability for the reuse purpose. Finally, a graphical DR modeling system is developed. And the future research is discussed.
Inspiration of Science Fiction Products to Innovative Design of Realistic Products
Authors: Wang Min
Published: August 2011

With the rapid development of science and technology, science fiction products are gradually becoming realistic and stepping into and affecting our lives. This paper begins from the connotation of science fiction products in movies, analyzes social, economical and technological base for the existence of science fiction products, and involves the impact and function in existing product design of science fiction products in the aspects of innovative model, advanced technology and material use and so on. Finally it comes to the conclusion that we can take advantage of future technology and new materials of science fiction products in modern product design to improve man-machine relationship of realistic products, design new lifestyles, and better man’s quality of life.
A Study on the Design of the Vision-Centered Digital Reading Interface
Authors: Yan Ru Shan
Published: August 2011

With the digitization of the whole society, digital reading becomes a new form of information-receiving, and technologies and products related with digital press, digital reading devices, reading contents, and reading methods have been always developing into perfection. Among all of these, humanization of digital reading design is no more limited in reading hardware. It shall meet users’ practical and aesthetic requirements by good-looking, practical, clear-themed, and simple operating system. This paper centers on digital reading and its visual expression to explore the features of digital reading with the hope of improving the coziness and pleasure of digital reading and offering information to receivers more effectively and correctly.
A Method of Design Process Reuse and Optimization Based on Design Process Gene
Authors: Li Bo , Tong Shu Rong , Wang Chun Xia , Shi Xin
Published: August 2011

A method of design process reuse and optimization based on the design process gene is proposed to enhance design efficiency. First, the concept of design process gene is put forward and its structure is disclosed. Second, the design process gene is categorized into three types according to their different roles in expression regulation. Their functions are analyzed respectively as well as their interactions. Third, the principle and procedures of design process reuse and optimization based on the design process gene and genetic engineering is proposed.
Optimal Electromagnetic Pump Design Based on Bond Graph Methods
Authors: Bai Yu Long , Ma Yong Jie , Gao Hai Sha , Wei Shu Ping
Published: August 2011

For modeling and simulation of dynamic systems, bond graph methods could be served as a powerful tool to make a compete model and to test the performance of the model. Bond graph is an explicit graphical tool for capturing the common energy structure of systems. This paper deals with the conceptual design of an electrical-magnetic pump, which should be considered as the different domains design, such as hydraulic, electrical magnetic and thermal domain. After the realization of the basic pump functions, the model will be converted into a 20-sim design environment in which the configuration parameters of the pump can be adopted in order to optimize the choice of the better pump properties, such as efficiency, capacity and the power consumptions. It is seen that the bond graph method with the 20-sim software can solve the pump design problems effectively.
Effect of Precursors on the Morphology of Hydroxyl Aluminum Prepared by Hydrothermal Treatment
Authors: Wang Jing , Jun Shi , Xu Bing
Published: August 2011

Hydrothermal treatment method was proposed to prepare boehmite and the effect of precursors on the morphology of beohmite was investigated. On the coordinate effect of organic and inorganic flower-like AlOOH assembled by nano-plates can be obtained by Al(NO3)3 as precursor. 3D urchin-like AlOOH superstructures consisting of nanoribbons were produced from hydrate AlCl3 as reagents. Dissolution and recrystallinity of intermediate product AlOCl caused this result. Globe and hollow sphere morphologies of beohmite were synthesized by Al2(SO4)3 in a water-alcohol system. The formation mechanism is also because of the dissolution and recrystallinity of intermediate product sodium sulfate aluminum. Beohmite prepared by hydrothermal treatment was transformed to γ- Al2O3 at 600°C. The morphologies of γ- Al2O3 powders were still kept their original forms.
Model of Water-Air Two-Phase Flow in Saturated-Unsaturated Soil
Authors: Fang Chun Hui , Zhang Xiao Yue
Published: August 2011

For seepage in unsaturated soil, there are both air flow and water flow, which can be called the water-air two-phase flow. In order to simulate the water-air two-phase flow in soil when there is groundwater, a numerical model of water-air two-phase flow in saturated-unsaturated soil is established in this paper. By the model, the air-flow and water-flow in unsaturated soil are both considered in seepage calculation. And the mass transfer between air-phase and water-phase, change of phase states are considered in calculation. Capillary pressure is the most important factor for the water-air two-phase flow in unsaturated soil, and the calculation method of capillary pressure is also given in the paper. At last examples are given to verify the correctness of the numerical model and the calculation method.
Numerical Simulation and Optimal Design Investigation on Air Duct of Floor Standing Air-Conditioner
Authors: Wan Zhong Min , Zheng Zu Yi , Chen Huan Xin , Liu Jun , Jin Ting Xiang
Published: August 2011

According to the structural characteristics of floor standing air-conditioner，three dimensional numerical model of air duct system for a certain floor standing air-conditioner is developed to simulate aerodynamic characteristic of the air duct. Flow characteristics and deficiency of air duct for original floor standing air-conditioner are analyzed, and the optimal schemes of air duct are raised and numerical simulation has been carried on to obtain aerodynamic characteristic of the new air duct. The numerical results show that the volume flow rate of air-conditioner with new air duct is increased by 6.1%. The experimental results of air-conditioner with new air duct show the volume flow rate of new air duct is promoted by 5.6% at the same approximate noise level. The numerical results agree well with the previous experiment.
Effect of Defects on Oscillatory Behaviors of Double-Walled Carbon Nanotube Oscillators
Authors: Li Jian
Published: August 2011

Molecular dynamics simulation is performed on the inter-tube friction force and energy dissipation of double-walled carbon nanotube oscillators with vacancy defects. It is found that there are vacancy defect-size and temperature dependences of the friction force between the inner tube and the defective outer tube. The original distance between the “hole” formed by the vacancy carbon atoms and the inserted end of the core has a significant influence on the oscillation profile.
A Force-Based Method for Computing Radial Stiffness of Multi-Spiral Plane Supporting Spring
Authors: He Peng Cheng , Jia Fang , Zheng En Lai , Ji Xin
Published: August 2011

The plane supporting spring, the radial stiffness of which is considered as one of the most significant parameters in design process and application, is commonly used in the isolation instruments in the fields of aeronautics, astronautics, auto industry, etc. Proposed in this paper is a force-based theoretical method for computing the radial stiffness of multi-spiral supporting spring, which is obtained by solving the component force and radial displacement of each spiral line using the force and energy approaches respectively. Finite element analysis (FEA) of Archimedes spiral-plane supporting springs with 1 to 6 spiral lines is made via speedy modeling by ANSYS parameter design language (APDL). Validity of the theoretical method has been verified by comparison of its calculation results and our numerical analysis. And the relationship between the radial stiffness of plane supporting spring and the key geometrical parameters has been confirmed by our study, which can surely provide insights into the optimal design of plane supporting spring.