bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation on Induction Heating Process for Crankshaft Shrink Fitting
Authors: Zhang Qing Lei , Zhao Bai Yu , Guo Jing Kuan
Published: November 2012

Based on induction heating theory, a finite elementmodel for electromagnetic-temperature field has been developed. The simulation of induction heating process in large size crankshaft shrink fitting is carried out by using FEA software ANSYS. With temperature and deformation distribution being calculated, the characteristics and effect factors in the induction heating process are also analyzed. In conclusion, the optimized crankshaft heating techonology could be estabished by adjusting technological parameters of the heating device. Specifically, frequency, current, heating position, etc.
Numerical Simulation of Digging Shovel Operation of Cassava Root
Authors: Yang Wang , Yang Jian , Li Zhao Jun
Published: November 2012

Based on the methods including modified Mohr-Coulomb yield criterion, Lagrange and smoothed particle hydrodynamics (SPH), the digging shovel - stem - root - soil system dynamics simulation model is established by ANSYS/ LS-DYNA. According to the model, the interaction mechanisms among the digging shovel, soil and root are discovered, and the processes of soil shearing and the changing processes of root's stress are analyzed. The mechanisms of shovel's soil loosening are discovered. The process of soil deformation, fracture and loosening and the changing process of root's stress on micro level are studied. The results show that (1) the main reasons for soil loosening in the digging shovel operation are that the soil on the wedge is bended fracture due to being squeezed and uplifted, and that the soil is sheared and broken in the direction of the wedge's normal, and that the soil has no supporting of the blade so that a lot of fractures appear on the soil and is separated by the shovel blade, and that the upper and lower soil can't be closed; (2) when the wedge's extrusion attains a certain value, the links of root and soil will be destroyed; (3) the soil stress value around the wedge is largest, and the soil shearing rupture develops from bottom to top, and the shearing rupture surface occurs in the widest place of shovel blade in the direction of wedge's normal; (4) when the blade's tail points at the root, the root's effective stress is largest and makes the bending deformation of root forward and upward in the meantime, and when the root's effective stress is too large, the root will be broken and the harvest will be lost.
Frequency Analysis and Optimization Design of Car Powertrain Mounting System Based on ADAMS
Authors: Wang Yao Hua , Chen Yi Bao , Tsai Gwo Chung
Published: November 2012

This paper introduced the method that developed model and frequency analyses of powertrain mounting system based on ADAMS (Automatic Dynamic Analysis of Mechanical Systems ). The six vibration frequencies and its corresponding modes were obtained and compared with experimental results. Mount stiffness of the four mounting parts were optimized to use Adams/Insight. The former low decoupling degrees and the new part stiffness were observed to improve the disadvantage and can reduce the vibration transfer.
The Analysis on the Typical Parts in F1 Race Car
Authors: Lai Hui Fen , Xiao Wu Zheng
Published: November 2012

This document explains and demonstrates how to analyze the stress of the axle, modify the rear wing and SolidWorks dynamic simulation analysis for the F1 Race Car. It offers a variety of results visualization tools that allow investigators to gain valuable insight into the design of the F1 race car, and makes it easy to share analysis results effectively with everyone involved in the F1 race car product development process.
SolidWorks Chain Drive Design and 3D Modeling Techniques
Authors: Mo Ya Lin , Xu Xing Xin
Published: November 2012

By analyzing the chart data and formulas in the traditional design of the roller chain, together with the SolidWorks modeling features, a fast modeling method of roller chain drive is presented on the basis of the main parameters in the chain drive design. In virtue of the Curve Driven Array, the chain modeling is executed in parts environment, with the track dimension property changed and the dimension driven mathematical formula established to correct the error between theoretical calculation and practical graphics, which ensures a successful array and provides an effective way for the rapid 3D model establishment of chains and the chain drive assembly.
Optimization Design of Rolling Bearing Based on Reliability Assessment
Authors: Zheng Jia Hong , Liu Yu Chun , Li Min
Published: November 2012

Today, transmission systems are playing important roles in engineering. For all of the components in them, status of the rolling bearing has been rising. In modern times, people are making great efforts on the optimization of transmission system. At the same time, optimization design of all the internal components was also important. For all the techniques, research to the rolling bearings has become increasingly mature. In this paper, the rolling bearing in growth of box of the 2 MW wind generator was took as the research object. The load coefficient of rolling bearing was been calculated, then the reliability assessment model of the rolling bearing was been made. On the basis of which, the optimization design on the reliability was done.
Numeral Simulation Study on Pipeline Corrosion Defects under Different Sizes and Pressures Based on FEM
Authors: Liu Han Wu , Dong Rui Hua , Lv Han Xun
Published: November 2012

Finite element analysis software ANSYS is used to establish a three-dimensional finite element model of the pipeline corrosion defects by applying the boundary conditions of square wave excitation to simulate the distributions of current and induced magnetic field in the pipeline under various defect volumes. The results of the study show: When there is no corrosion defect in the pipeline, the electric current in the pipeline is basically even distribution. The magnetic field is distributed for the symmetrical vortex shape from head to foot, and it has not obviously gather phenomenon. When there are some corrosion defects in the pipeline, the electric current forms partial symmetrical vortex shape in both sides of the corrosion defect, and it is obviously assembled in the defect place. The simulation results of the different size defects show that the maximum magnetic field strength and the maximum current value increase with the defect depth increasing, while the output voltage decreases with the defect depth increasing. For the analysis of the stress distributions of the pipeline corrosion defect with certain size under different pressures, it was found that the maximum stress is 596 MPa when the bearing limit work pressure of the pipeline is 7 MPa, which is smaller than the yield strength with ensuring the safely running of the pipelines with defects.
Exploration of Revolved Parts Modeling Based on MBD and Pro ENGINEER
Authors: Wang Li Xin , Guo Ming Yue , Guo Yu
Published: November 2012

A great change in mechanical industry has occurred after several successful practices using MBD (Model Based Definition) of The Boeing Company. It is an inevitable trend from two-dimensional product definition to three-dimensional product definition in mechanical industry. In China, two-dimensional design is widely used, and many enterprises have started to use three-dimensional design. Several standards for MBD have emerged around the world. This paper takes the planet shelf in planet driver system as an example, explores the revolved parts modeling methods based on MBD and Pro ENGINEER, and then makes a conclusion. Following these methods we can build a model which conforms to MBD standards correctly and efficiently.
Research on the Recognition Method of Exploded Dimension Based on 2D Engineering Drawings
Authors: Wang Li Xin , Wang Yan , Zhou Jun , Xue Hui Ling
Published: November 2012

Dimension feature recognition plays an important role in feature recognition in 2D engineering drawings. At present, in most dimension feature recognition methods, the first step is the recognition of whole feature, and then to extract feature information. These methods have some disadvantages, especially in exploded dimension feature recognition. Aimed to solve this problem, this paper introduces a new algorithm of intelligent dimension feature recognition. According to the position relationship with basic elements of dimension, the dimension is recognized in a bottom-up approach. This new method can solves the problem of recognizing the exploded dimension
Finite Element Analysis for Cycloid Gear and pin Teeth of FA Cycloid Drive Based on ANSYS
Authors: Lei Lei , Shi Xiao Chun , Guan Tian Min
Published: November 2012

In order to validate the force analysis between cycloid gear and pin wheel, the paper built the contact FEM model of between cycloid gear and pin teeth, analyzed statically three-dimensional contact analysis for them and get their contact state. The calculation results coincided with the force analysis method and proved the correctness of the stress analysis theory.
The Development Style for Overhead Crane CAD System
Authors: Tao Yuan Fang , Shi Xiao Fei
Published: November 2012

The environment of application for overhead crane CAD system has been satisfactory. The fitting hardware and software system should be used, the appropriate development style and usage model should be taken, and the emphases should be put on the development of programming. That’s the most important thing the crane plants should do.
Modeling of 2D Layout Design System Based on Convex Hull Plus Rubber Band Analog
Authors: Liao Xiao Ping , Lu Juan , Ma Jun Yan , Xue Jia Hai , Yu Xiao Mo
Published: November 2012

This paper introduces a novel approach to develop a 2D layout system based on the convex hull plus rubber band analogy. The data processing of convex hull and the rubber band analogy modeling methods are elaborated practically; The rubber band simulating model is built quickly by using the ray scanning method; Collision detection by area algorithm based on Boolean logic is processed; The practical cases of developing 2D layout system are demonstrated to illustrate that the proposed approaches are effective.
A Novel Real-Time Algorithm for Torsional Vibration Mode of Generator Sets Based on Rotation IIR Filter
Authors: Li Juan , Yang Yuan Hong , Jiao Shao Hua
Published: November 2012

The shafting torsional vibration mode of generator sets reflects dynamic process of the power grid. This paper proposes a novel real-time algorithm for shafting torsional vibration mode decomposition of generator sets, which has excellent time-frequency resolution. The algorithm realizes the signal frequency resolution filtering based on classic infinite impulse response (IIR) filtering. At the same time, the inertia of the narrow-band filtering algorithm is eliminated through multi-period rotation IIR filtering and the time-frequency dynamic resolution of the modal decomposition is realized. PSCAD-based simulation verifies that the algorithm has the frequency anti-aliasing performance, and can fully reserve the time-frequency variation characteristics and can realize the multi-mode real-time decomposition of the torsional vibration perfectly. The algorithm can also be used for the time-frequency analysis in other fields.
Research on Automatic Verification Device for Vehicle Sideslip Tester
Authors: Shao Jian Wen , Lin Feng , Ye Zhen Zhou
Published: November 2012

This research proposed an automatic verification device and realized automatic verification of vehicle sideslip tester. In this research, AVD(Automatic Verification Device) constitutes down termination PLC and touch screen MCGS, ensuring the automatic verification accurate and efficient. The AVD not only realized the application of electronic technology and sensor technology during the certification process, but also avoided the uncertainty caused by the artificial reading and data sampling difference. Furthermore, the system can generate the original records and certificates reports automatically, which improve the efficiency of measurement greatly and reduce the verification workload. The system has extensive practical value in the verification of vehicle sideslip tester, it can be extended to other items in vehicle inspection field.
Terramechanics Model and Motion Control Strategy Simulation for down-Slope Travel of a Lunar Rover
Authors: Huang Wei Dong , Bao Jin Song , Xu You Sheng
Published: November 2012

Slopes are a typical terrain of the rugged lunar surface. Using a modified model for wheel-terrain interaction, a terramechanics model for down-slope travel of a lunar rover is established. In order to describe the soil sinkage of different wheels more accurately, soil deformation by the front wheels is taken into account and the front and rear wheel sinkages are calculated separately. Finally, a motion control strategy for rover descent is proposed based upon analysis of its descending course, and validated by simulation in a 3D lunar rover visual simulation platform.
The Electric Field Characteristics Analysis of Converter Transformer Considering Anisotropic
Authors: Gao You Hua , Hou Xiao Mo , Gao Hong , Liu Xiao Ming
Published: November 2012

Simulation and analysis of the converter transformer valve side’s transient electric field by finite element method is proposed. The electric field of converter transformer valve side’s is calculated under polarity reversal condition, the maximum value of the electric field intensity of insulating materials and the potential distribution of the before and after first polarity reversal are given, obtaining the electric field distribution characteristics of the oil-paper insulation material in the case of isotropic and anisotropic before and after the first polarity reversal, and made a comparison. The numerical calculation result of the converter transformer valve side’s electric field is also given, and the comparison of the calculation results in the case of isotropic and anisotropic, for before and after the first polarity reversal is analyzed, obtaining the variation rule of the converter transformer valve side’s electric field and the variable factors which affected the distribution of the electric field.
Study on Case Library of Parameterized Aero-Engine Overall Structure
Authors: Fan Jiang , Zhang Jia Rui , Zhang Rui , Shen Xiu Li , Wang Rong Qiao
Published: November 2012

To take full advantage of and learn from overall structure of existing engine case, this paper presents parameterized, object-oriented method and similarity retrieval algorithms. A case library of parameterized engine overall structure is established by “top-down” master modeling method. On this basis, the management of engine parameters in case library is achieved, which built a foundation for the rapid design of new program at stage of overall structure design.
A General Method for Synthesizing Straight-Line Linkage with Ball and Burmester Points
Authors: Yin Lai Rong , Han Jian You , Huang Juan , Yang Tong
Published: November 2012

For straight-line linkage synthesis with Ball or Burmerster points, the traditional calculating method is separated, and lack of unitarity. In this paper, we derived the general formulae of kinematic analysis for link-point of four-bar mechanism, including velocity, acceleration, one time rate of acceleration change, and two times rate of acceleration. So the four-bar straight-line linkage whether with Ball or Burmester point can be verified. And then, the synthesis methods are unified theoretically. An illustrative example is given to verify the correctness of formulae derived. This approach is a novel analytical method for verifying and synthesis four-bar linkages with four and five infinitesimally separated positions of the point falling on a straight-line.
Modeling and Analysis of Joint Motion of the Rope and Trolley in Crane System
Authors: Zhou Hou Cun , Zheng Chong Guang , Zhang Hui Zhuo , Zhang Xiao Qian , Huang Yi Yong , Wen Yuan Lan
Published: November 2012

Considering the fact that the anti-swing performance and transport efficiency of the crane system are not satisfactory if we just control the velocity of the cable car, we came up with a joint control technology of the rope and trolley in crane system. Firstly, the simplified mathematical model of the cable car system is built. Secondly, the best joint control scheme is discussed by modeling simulating. Finally, the designing of joint control system is analyzed. What’s more, we will carry relevant experiments about the joint control technology in the near future. The data obtained from our experiment will be used to verify our theoretical results of joint control.
Comparison Research on Two Luffing Mechanisms of Lemniscate Type Crane
Authors: Li Ke Qin , Jiang Cui Xiang
Published: November 2012

Lemniscate type crane is used for water transhipment operation. There are great differences in outward appearance, geometric shape, luffing performance between lemniscate type crane and normal double-link type crane. Lemniscate type crane has some advantages, i.e. lower centre of weight, practical and reasonable structure, strongly anti-wind, upwarp of flying jib invariably and easy operation. Luffing mechanism of lemniscate type crane has two driving methods, one is boom driving, another back-rocker driving. Based on comparison research, the equations of kinematics of two luffing mechanisms are obtained. Luffing characters of lemniscate type crane are more better.
Instance Analysis on Designing Method of the Transmission Multi-Cones Synchronizer
Authors: Huang Xiao Ci , Zhang Yan , Zhang Hai Bo
Published: November 2012

This paper introduces basic working principle of multi-cones synchronizer. Analyzes process of multi-cones synchronizer’s academic calculate and parameters calculate. And makes practice case of multi-cones synchronizer compute and analysis.
Design Parameters Optimization of Cutting Head of Cantilever Roadheader Based on Genetic Algorithm
Authors: Liu Gang , Mu De Sen , Duan Shi Xi , Song De Chao
Published: November 2012

For hard rocks whose protodyakonov scale of hardness f are greater than 8, research on the optimization design of cutting head of cantilever roadheader. Optimization model of the cutting head was established, in this model, the objective function was established based on dust mount, energy consumption and production efficiency. The design variables contain cutting head structural and kinetic parameters, the constraints are determined in accordance with working condition and practical experience. Cutting head parameters are optimized with parameters change related to rock strength, using genetic algorithm in Matlab7.0. A variety of cutting parameters optimization results related to rock strength are of great significance for the structural design of the cutting head and selection of kinetic parameters.
Analysis on Load Distribution of Needle Bearing Considering Misalignment
Authors: Bai Xiao Bo , Ji Xiao Ming , Guo Lei
Published: November 2012

A quasi-static analytical model for needle bearing was established base on the rolling contact theory and the force analysis of needle bearing,and the model was caculated by computer program.Conclusions are drawn as follows by analysis of needle bearing load distribution in different misalignment,different load,different clearance,different speed,different crown drop of needle:work of bearing would be influenced if misalignment so big,the influence of misalignment must be considered when the engineer determine the clearance of beearing, it’s rotational speed has small influence on the load distribution of bearing ,reasonable choise of crowning of needle could be enhanced the lifetime of needle bearings.
New Approach for Spatial Mechanism Synthesis with the C-S Binary Crank by Adaptive Saddle-Fitting
Authors: Shi Zu Guang , Wang Shu Fen , Li Yu Guang
Published: November 2012

The new approach for approximately synthetically spatial C-S Binary with adapt saddle-fitting is presented, given the definition of adapt saddle-fitting cylinder surface and approximate cylinder surface point, constructed unified mathematical model of adapt saddle-fitting cylinder surface fitting of spatial curve and unified error standard . It is solved by saddle-point programming. The example shows optimization methods are effective and global convergent.
Propellant Filling Equipment Simulation for Virtual Assembly
Authors: Chen Jia Zhao , Zhang Yu Xiang , Ning Chao
Published: November 2012

3D models of propellant filling equipment were constructed by using Autodesk Inventor, and assembly relation model was established by using connection graph method. Movement attribute was set and the models were romanced in Multigen Creator. A virtual scene of propellant filling equipment was set up, and assembly process demonstration and interactive operation simulation were achieved by using Vega Prime. Maintenance personnel training in the virtual assembly environment gets a good result.
Design of a Hybrid Magnetic Bearing Based on Equivalent Magnetic Circuit Method
Authors: Liu Yu
Published: November 2012

The structure and working principle of a new hybrid magnetic bearing is introduced in this paper. To overcome the drawbacks of finite element method(FEM) in parameter design of hybrid magnetic bearing, a method based on the equivalent magnetic circuit method is proposed. The calculating equation and procedure for all parameters of the hybrid magnetic bearing are deduced in detail. The feasibility of the proposed method is verified through an example and the influence of the air gap length on other parameters is studied. The distribution of magnetic flux in the air gaps calculated by ANSYS is in good agreement with the design goal, which validates the proposed method.
Similarity Assessment for Assembly Model Based on Component Attributed Relational Graph Matching
Authors: Tao Song Qiao , He Wei
Published: November 2012

3D CAD model retrieval has received a lot of attentions in the academic community. Most existent methods for 3D model similarity assessment focus on component models instead of assembly models. In this paper, an assembly model similarity assessment method is presented in order to find the similar assemblies model for design reuse. First, assembly model is described as component attributed relational graph. Then, the compatibility matrix between two assemblies is calculated, which serves as the measure of their similarity. Finally, the optimal matching under the measures is calculated using Hungarian Method. Experimental results show that this method is able to support the assembly similarity evaluation.
Optimization Design and Numerical Simulation for Aerodynamics Shape of an Aircraft
Authors: Tang Hong , Chen Guo Guang , He Hui Zhu
Published: November 2012

Considering safety and reliability of interface between aircraft and artillery, aircraft need of increasing space of shell bands, but its range decreased by flight experimental results. It is enough to numerically simulate and calculate to aerodynamics of two projects (namely aircraft increased spacing bands vs. archetype aircraft) model in this paper. The simulation results show that big space of shell bands affect aircraft body’s coefficient of drag, and keep to flight experimental results. In keeping to big spacing bands at the same time, it is put forward optimization scheme that aircraft can reach to design range by adjusted tails shrink angle. When the tails shrink angle reached to six degrees, the big spacing bands aircraft’s coefficient of drag decreased obviously and pressure coefficient little increased to avail of improving aircraft’s range by a large of numerical simulations.
Aerodynamic Optimization of Variable Pitch Wind Turbine Blade Based on Adaptive Genetic Algorithm
Authors: Tian De , Chen Guang Hua , Li Qi
Published: November 2012

Take maximum power output of blade element as design target, establish a optimization model of variable pitch wind turbine blade. Using the adaptive genetic algorithm to search for to overcome the shortcomings of early maturity and poor stability, it can reach more close to the global optimum than the classical genetic algorithm. Use this method to design a 3MW variable pitch wind turbine blade, the results show that this optimization model is correct and the method is practical.
Design of the Lower Extremity Rehabilitation Robot Communication System
Authors: Guo Qing , Jiang Dan
Published: November 2012

According to this analysis, we designed a scenario on lower extremity rehabilitation robot communication system based on CAN bus and efficiently solved the problems of low signal processing, computing power and data transfer rate ability for the traditional means of communication of RS232 and RS485.The research deals with the characteristics of communication systems and topological structure, and specifically, with CAN bus protocol design and hardware and software implementation aspects of Communication System designing for some robot sensor.
A Multiply Function Device for Self Protection (Especially for Females)
Authors: Zhai Yue , Zhang Yu , Tang Jin
Published: November 2012

The design for multi-function self defense device can strengthen the protection for females, also provide automatic alarm and trace the location of the device (user).Traditional defense devices can not combine defense function with automatic alarm at the same time. GPS system, infrared communication and single chip microcomputer were used .The device can be used when people go out alone. It can spray pungent water, emit strong light, call the user’s relatives as well as send out current location massage in a secret way. The implement of the device demonstrate that the device could be employed satisfactorily when the users need effective help in emergency.
Simulation Study of Kinematic Characteristic for Torsion-Beam Rear Suspension of Automobile
Authors: Gao Jia , Xie Jin Fa
Published: November 2012

The simulation model was established by ADAMS/CAR to study the torsion-beam rear suspension’s kinematical performance. The changes of automobile handling stability characteristic parameters were analyzed in driving condition. The simulation results show that the suspension kinematic analysis data can be applied to the relevant design and development work to provide a basis for study of automobile handling stability and ride performance.
Application of Ergonomics Principles in the Packaging Machinery Design
Authors: Yang Ning Bin
Published: November 2012

Ergonomically sound packaging machinery offers several efficiency-enhancing benefits, including reduced operating costs by avoiding work-related injury. This article discusses the common ergonomic injuries in packaging line, the risk factors for ergonomic hazards, and the ergonomic principles applied to the design of packaging machinery.
Optimum Design of Planar Four-Bar Linkage for Scheduled Tracks
Authors: Liu Tian Xiang , Wang Chun
Published: November 2012

The mathematical model was established, the pragram was made to optimize the lengths and angles of each link by means of inner point penalty function method. Involving 12 scheduled points, the track of a certain point on the coupler of a planar four-bar linkage was realized and previewed using Matlab. The optimum program presented here could enhance the design efficiency and insure the design accuracy markedly. By this method the coupler-curve involving more than or less than 12 points could be realized, and more complex multi-linkage could be designed.
The Improved Research of the Defrosting of an Automobile Windshield
Authors: Huang Tai Ming , An Wei Ke , Tan Jing Yin , Zhou Yong
Published: November 2012

The defrosting is very important in vehicle. In the paper, some improved proposals to the lack performance of the vehicle windshield defrosting would be discussed by using computational fluid dynamic (CFD) numerical simulation analysis and experiment to validate the improved proposal. The improved proposal including change the angle of the grill of wind outlet, and add grill on the left and right side. The discrepancy of the two methods is in 5%, which is acceptable. By the improved proposal that the windshield defrosting area is increased and also the requirements is satisfied.
Optimization Design on Vibration and Noise Reduction of Damping Sandwich Circular Saw
Authors: Wang Ting , Yao Tao , Duan Guo Lin
Published: November 2012

In view of the study of topology optimization design method on vibration and noise reduction of damping sandwich circular saw, the optimal thickness and layout of damping material were obtained. The optimization model of circular saw was established by using the coupling method, the optimum thickness of damping layer was found. By using ESO method, deleting elements method and modal loss factor sensitivity calculation method were obtained. Making use of modal loss factor sensitivity, ineffective elements were deleted by judging the whole structure damping effect on each damping material element, optimal configuration of damping sandwich circular saw structure under the stiffness condition was obtained, which reduced the vibration and noise and reached a certain stiffness requirements. By contrasting the damping loss factor of three different circular saw models, the results show that optimized circular saw structure has the best damping effect.
Research on Sprayer Innovative Design Based on Ergonomics and Rapid Prototyping
Authors: Zhang Shang You , Zhang Tian Hui , Gu Li Chun , Guo Lin , Tan Ya Qing , Xu Ren Ping
Published: November 2012

Innovation is the only approach to obtain competitive products. Companies will maintain their invincible position in the fast-changing market by accelerating products innovation speed and improving quick-response ability. The research focuses on the design of innovative sprayer based on ergonomics and rapid prototyping. In terms of the size, shape and colour of sprayer design, it was taken into account from anatomy, physiology and psychology of human characteristics. Thus the operators can work healthily, comfortable and effectively. In the every stages of design, various prototypes provided by rapid prototyping were used to evaluate, test and modify of 3D models, along with test on function and assembly. Then time of design can be shortened significantly, the speed of sprayer innovative design can be increased, the development costs and investment risk can be decreased, and the enterprise competitiveness can be promoted.
The Effects of Background upon Engineering Design Expertise – A Sino Occidental Comparison
Authors: Newing Amanda , Waal Sarah van der , Steele Clint
Published: November 2012

To date the majority of research into engineering design expertise has been done within an occidental context. With an increase in multinational design firms engineers are now more likely to work with engineers of different backgrounds. The authors’ experience in countries other than their own suggested that background can affect design engineers’ thinking and working, and the nature of expertise. This prompted a study (via interviews) into design teams with mixed (by nationality) members. This investigation into occidental and Sino backgrounds and engineering design expertise showed that a Sino background encouraged low risk reliable designs and detailed thinking while an occidental background promoted unique ideas, systemic thinking and the use of objective knowledge. However, individual change and improvement is possible.
The Application of the Expansion Lever Method
Authors: Cheng Qi Qiang , Li Jiang Jiang
Published: November 2012

The explanded Lever method was used to designe and analyze the 8-speed AT .The studying results proved the correctness of the explanded Lever method, and a transmission scheme of 8-speed AT was designed and researched through it.
Gravity Torque Balancing Device’s Optimization Design of Prosthesis’s Shoulder Based on Nonlinear Programming Genetic Algorithm
Authors: Fan Bing Hui , Yuan Cheng Zhi , Min Feng
Published: November 2012

Robot prosthesis has 6 degrees of freedom, including outward swinging and forward and backward swinging, which are droved by servo motors. In order to reduce the servo motors’ driving torque, a gas spring was added on shoulder to balance the gravity torque. In this paper, the difference between gravity torque and balanced torque was created and taken as optimized object firstly, and then a mathematical model was created and Matlab program on the base of nonlinear programming genetic algorithm were made for obtaining the optimum, lastly the simulation model and optimizing process diagrams were outputted.
Users’ Requirements and Preferences in the Success of a New Product: A Case Study of Automotive Design
Authors: Taha Zahari , Alli Hassan , Abdul Rashid Salwa Hanim
Published: November 2012

There is a significant amount of research and empirical investigations indicating that consideration of users’ requirements and preferences has become an important issue in product design. They are also important as a valuable source of facilitating the product designer in establishing the characteristics of a new product. The aim of this study is to establish the influence of users’ requirements and preferences that has resulted in the success of an automotive. A survey was conducted to identify the key characteristics factors for success of an automotive. Based on these findings, several recommendations are proposed for a product designer to develop the specifications for a new automotive.
The Modeling Design of Health Bedding
Authors: Zhang Hong Xia , He Qiong Duo , Fan Li Xia , Shi Xia Li
Published: November 2012

Due to recent increasing life standards and the development of social civilization, the demands for bedding’s modeling, aesthetic and comfort are greatly improved. At the same time, health is considered as an important factor in the design concept of modern bedding, and also health consumption become one of the main characters in modern bedding consumption. With the study on the principle of bedding-related human engineering, some quantitative theoretical data are summarized, to make the bedding modeling design more scientific. Also, a novel design of bedding series (focused on the bolster and back cushion) which makes the bedding more extensive and depth in application is adopted in this paper.
Resource Configuration for the Collaborative Development of Product
Authors: Zeng Fu Hong , Zhou Lan Hua
Published: November 2012

In order to meet the reasonable matching of resource for collaborative development of products in manufacturing enterprises including involvement of suppliers on a large scale, a Generalized Design Resource Pool (GDRP) and It’s Resource Particles (RP) are defined, a multi-project collaborative planning and resource particles constraint-matching model with realization algorithm is presented. Finally, a case of developing mobile phone to an enterprise is presented to verify the effectiveness and feasibility of the presented approach.
Research of Product Form Design Based on Comprehensive Product Processes
Authors: Cao Mei Li Cao , Yang Ning Bin
Published: November 2012

Based on the theory of PLC, a new method of form design is draw up to be “PLC analysis - Progress choose - Morphological characteristics –Product form design”, by considering the multiple relevant processes in all stages of PLC, to achieve the full unity of the form and processes, which varied from the traditional thinking mode of product design concentrating on product manufacturing process only. Then the design of motor oil container was done with the implement of new method.
Study on Mix-Variable Collaborative Design Optimization
Authors: Gao Li , Wang Rong Rong
Published: November 2012

In order to deal with complex product design optimization problems with both discrete and continuous variables, mix-variable collaborative design optimization algorithm is put forward based on collaborative optimization, which is an efficient way to solve mix-variable design optimization problems. On the rule of “divide and rule”, the algorithm decouples the problem into some relatively simple subsystems. Then by using collaborative mechanism, the optimal solution is obtained. Finally, the result of a case shows the feasibility and effectiveness of the new algorithm.
Pedigree Based Product Conceptual Design
Authors: Yao Kong , Yang Bong , Wang Xing Zu , Gao Chang Qing
Published: November 2012

By applying pedigree into product conceptual structure design, an evolutionary conceptual design approach is set forth to make full use of creative and innovative intelligence of living systems for design automation. According to the evolutional logic of quantities to quality, the relationship between different conceptual structures is deduced and ordered，then is expressed as product pedigree. The classification description model of product pedigree is established, which can be used as unified functionally isomorphic model during the intelligent conceptual design process. On the other hand, according to the evolutional logic of quality to quantities, pedigree based product evolutionary design strategy are given. Based on the relation network among pedigree units, multiple variation designing schemes can be obtained, which is a strong backbone to the innovative design process. Finally, design examples are used to demonstrate the successful application of the proposed pedigree based evolutionary method in the multi-scheme conceptual design of product.
Prototyping in the Product Interface Design
Authors: Li Zheng Sheng , He Can Qun
Published: November 2012

As a critical tool in the interface design, prototyping can improve the effectiveness and efficiency of the interface and can help developers and manufactures decrease the cost of products development by testing products’ usability before they enter into the market. The paper introduced the importance of prototyping in product interface design and its developing trend in the present and in the future by discussing the background of prototyping techniques, the advantages and disadvantages of different types of prototypes, how to prototype in the product interface design and how to evaluate prototypes.
Research on Multi-Objective Decision-Making of Materials Selection for Green Manufacturing
Authors: Xi Jun Jie , Liu Hong Yu , Liu Jun Qing
Published: November 2012

Materials selection for green manufacturing is a complicated system engineering. Materials selection for green manufacturing is a sort of fire-new idea compared with traditional materials selection. The influence of materials to outer environment was studied. The method of materials selection for green manufacturing, integration of technical, economic and environmental principle was put forward. Its supporting technologies were researched that include database and knowledge base of green materials and environmental influence evaluation system based on green materials life cycle. The constraint conditions, model and process of multi-objective decision-making of materials selection for green manufacturing were built so as to provide theoretic and technical support for materials selection.
An Integrated Reverse Modeling Approach Based on Reconstruction of Features and Constraints
Authors: Kang Lan , Li Ya , Chen Zheng Ming
Published: November 2012

Reverse engineering is an important tool to generate CAD models. This paper describes an integrated approach for modeling parts from point cloud to surfaces or solids based on features and constraints. The approach allows designers to integrate reverse engineering and feature-based CAD system in the reconstruction of parts. This approach has two advantages over current practice and the reconstructed models produced by this method are feature-based and constraints satisfaction, which provides a higher level description of part geometry rather than the tedious low-level editing of geometric descriptions as in reverse engineering. This method also facilitates modification and innovative design to the reconstructed parts, which would be extremely difficult or impossible to accomplish if current reverse engineering method is applied. In addition, it is a more convenient and practical way for designers. To illustrate the validation of this integrated modeling approach, a more complicated example is illustrated based on the approach.
Study on Surface Refactoring Based on Reverse Engineering Software - Imageware
Authors: Chen Le Yang , Li Yang , Jian Wu
Published: November 2012

In this article, based on the research of point cloud acquisition, data preprocessing and surface refactoring of reverse engineering, we analyzed the function and process of the reversing software—IMAGEWARE so as to provide reverse engineering design methods to reversing style design of curved surface refactoring and re-design of products.
Modeling and Numerical Control Machining of the Mould of a Rearview Mirror of a Motorcycle Based on the Reverse Engineering Technology
Authors: Gao Yong Xiang
Published: November 2012

The Reverse Engineering Technology (RET) is extensively employed in the realm of product designing. In this paper, a Three-coordinate Measuring Machine is utilized first to measure the data points of the rearview mirror of a motorcycle, then under UG modeling environment, surface reconstruction is conducted, and lastly procedures like mold splitting and mold core machining are finished upon exercising the Moldwizard Module of UG software. In short, the application of the RET greatly shortened the period of product designing and manufacturing.
Multi-Degree Reduction of DP Curves with Constraints of Endpoints Continuity
Authors: Cai Hua Hui , Cheng Yan , Zhu Yong Hong
Published: November 2012

In this paper, we presented a constrained multi-degree reduction algorithm of DP curves based on the transformation between the DP and Bézier curves. We first correct the conversion formula between Bernstein basis and DP basis. And then, we deal with multi-degree reduction of NP curves by degree reduction of Bézier curve.
Pre-Reinforcement Technology in Broken Roof Side Condition
Authors: Shen Yu San , Zeng Li Jun
Published: November 2012

The roof side broken brings serious security risks in the construction in coal mine. The geological structure of faults and folds that encountered in coal mine and the affect of abutment pressure in the goaf creat roof side broken. If in the way of reinforced support to control the surrounding rock, it is difficult to achieve the expected security. Especially if the roof side broken appears in the mining gateway, controlling the surrounding rock by the way of reinforced support causes waste of materials and the supporting effect is limited. So, combined with the distribution of abutment pressure of the surrounding rock in broken roadway, starting from the nature change of the surrounding rock, through injection of Malisan to change the broken condition of surrounding rock, the broken roadway is effectively.under control.
Simple Nonlinear Static Analysis Using Truss Models for Modeling Snap-through of Thin Shallow Arches
Authors: Xenidis Haris , Morfidis Konstantinos , Papadopoulos Panagis G.
Published: November 2012

In this paper, a truss model is used for the geometrically nonlinear static analysis of a thin shallow arch subject to snap-through. Thanks to the very simple geometry of a truss, the equilibrium conditions can be easily written and the global stiffness matrix can be easily updated with respect to the deformed structure, within each step of the analysis. A very coarse discretization is applied. For the geometrically nonlinear static analysis, a short computer program has been developed by displacement control of a plane truss model of a structure. This very short, fully documented computer program is applied on the geometrically nonlinear static analysis of a specific thin shallow arch subject to snap-through.
Fatigue Analysis and Simulation on Engine Case
Authors: Meng Fan Wu
Published: November 2012

In this paper, a model of an engine case is designed in Pro/Engineer for fatigue simulation. The meshing is created by the way of Abaqus. According to the working conditions, the boundary restriction of the simulation is defined. By the simulation, the heat distribution of the engine case is given, the causes of relatively high temperature areas are discussed, and the heat-stress distribution is drawn too. The high stress area in the engine case is discovered. The simulation result shows that the steady working stress is about 60MPa, the transient stress is between 90MPa to 120MPa, and the maximal stress is 136MPa. Based on the heat stress the fatigue life of the engine case is analyzed. The research result is a reference of the engine case safe working.
Finite Element Analysis of Drive Axle Housing with ANSYS Workbench
Authors: Bai Ning Shan , Jiao An Yuan , Liu Shi Ming
Published: November 2012

UG software was used to build the entity model for light truck driving axle housing, imported the model to ANSYS Workbench collaborative simulation software, and analyzed the stress after meshing and loading. It can be seen that the maximum equivalent stress of the drive axle housing under various conditions was less than the allowable stress value, and the evaluation index of vertical bending static strength experiment is Kn> 6, meeting the strength requirement; In the condition of full loads, the maximum deformation of the per-meter center distance is: 0.1 mm/m < 1.5 mm/m, also meeting the rigidity requirement; The experimental study is used to verify the analysis results referring the relative articles, shows that analysis results are reliable. This process provides reference for other driving axle housing and similar structure finite element analysis.
The Research for the Piezoelectricity Rain-Removing System of Rearview Mirror
Authors: Liu Jia Jun , Jiao Xiao Yang , Yang Zhi Gang , Liu Jian Fang
Published: November 2012

In order to solve the problem of blurry sight made by rain drop on the rearview mirror on rainy day, a rain-removing device making use of piezoelectric vibrator is put forward. Design the structure of the rain-removing device, build its finite element model and modal analysis for the piezoelectric vibrator is done. Piezoelectric rain-removing device prototype is manufactured and amplitude of the mirror is tested with different voltages and frequency. At last rain-removing effect for the rear mirror is measured with varies of angle at which piezoelectric vibrator is installed. The proportion of the removed rain drop is 80% when piezoelectric vibrator angle is 60° and the voltage and frequency on the piezoelectric vibrator is100V and 800Hz respectively.
Simulation-Based Reliability Analysis for Kinematic Accuracy of Retracting Mechanism of Landing Gear
Authors: Zhang Jun , Zhang Bing , Yu Rong Gang
Published: November 2012

A simulation-based reliability analysis approach for kinematics accuracy of retracting mechanism is presented. The parametric variable model with linkage dimension error and joint clearance of retracting mechanism is modeled in ADAMS, adopting the Monte Carlo simulation method to analysis the influence of kinematic accuracy. The flowchart of the approach has been presented. Finally, the retracting mechanism is taken as an example to validate the proposed method. The results show that it is more accurate than the traditional methods.
The Finite Element Analysis of Derrick of Coal-Bed Methane Rigs
Authors: Zhi Liu , Wu Di , Sun Bao Shan
Published: November 2012

Using the finite element analysis software ANSYS established derrick model of CBM drilling rig car and calculated its static strength and model analysis. The maximum Mises stress and the weakest position of derrick was determined and given its four bands of natural frequencies and corresponding vibration model. The conclusion can be gotten from calculation results that the structure of derrick meet the requirements of design.