bluuebunny/crossref_metadata_2025 huggingface dataset:
Thermo-Mechanical Analysis of Torpedo Car
Authors: Zhao Jing Yun , Zang Yong , Qin Qin , Wu Di Ping
Published: December 2010

When a new torpedo car is developed, its thermo-mechanical stress must be analyzed carefully in order to guarantee its strength condition. This paper describes an investigation into the thermo mechanical behavior of the torpedo car using ANSYS software. A three-dimensional, coupling model of torpedo car has been established successfully. The analysis produces outputs such as the temperature distribution and coupling stress of this car. The influence of swell gap and refractory lining thinning are also discussed. The results indicate that the swell gap and entire thinning of refractory lining can reduce the stress remarkably, but the local thinning will increase the stress of this local zone.
3-D Flow Field Simulation for Extruding Part of Mixing-Extruding Machine
Authors: Wang Chuan Sheng , Li Shan Hu , Fu Ping , Lü Chun Lei
Published: December 2010

The physical, mathematical and finite element model of the extruding part of mixing-extruding machine was established to carry on the finite element simulation of the extrusion part flow field. Results showed that the double cone screw have better mixing and feeding properties than single screw.
The Study of Forklift’s Overall Design System Based on Design Knowledge Reuse
Authors: Jiang Shao Fei , Li Ji Quan , Huang Jing Meng , Kong Ying
Published: December 2010

The forklift design is a creative activity based on the complexity of knowledge and experience. To fully use the successful experience and knowledge of forklift’s design which have been in using and shorten the period of forklift’s development, to enhance the rapid response ability of enterprises to the markets, we put forward the method of forklift’s design reuse based on CBR, at the same time; develop the overall design system of forklift----HCDesign. Furthermore, we analyze the functions, structures and the implementation module of the system to study some of the key technique, using the case to verify the system’s validity.
A New Numerical Approach for Adhesive Contacts of Real Engineering Surfaces
Authors: Zheng Yu Qi , Wang San Min
Published: December 2010

Microelectromechanical system (MEMS) and nanotechnology are important directions on the development of the science in twenty-first century. Some of the effects, such as viscous force, surface force, electrostatic force, friction etc., which can be usually ignored on the traditional scale, have become noticeable when the scale has turn to micro or nano scale. Nanotribology is one of the main areas of the indispensable researches on the basic theory and methodology of the effects. The micro/nano adhesive contact which is the foundation of nanotribology is studied in this paper. The earliest study on adhesive contact was done by Bradley. He presented an expression of adhesive force of two contacting rigid spheres. Derjaguin, Muller and Toprov (DMT) gave the relation of the contact area and the applied load of the adhesive contact of two spheres, but they did not consider the elastic deformation due to the adhesive force of the bodies. Johnson, Keudall and Roberts (JKR) provided a theory of the adhesive contact of two elastic spheres. Tabor gave a parameter (Tabor parameter) to interpret the ratio of the elastic deformation with the adhesive force of two contacting bodies. That is to say the DMT model corresponding to small Tabor parameter(<0.1) and the JKR model to large Tabor parameter(>5). Maguis gave a DMT-JKR transition using the Dugdale model in fracture mechanics (M-D model) in the intermediate region between the DMT model and the JKR model. A numerical algorithm of elastic adhesive contact based on the meshless method is presented in this paper. This make it possible to solve the adhesive contact with more complex surface topography and to consider more intricate factors, such as thermal stress, friction, elasto-plastic deformation etc. in the further studies on micro/nano scale adhesive contact problems. The meshless method seems to be a promising approach for contact analyses because of its flexibility in domain descritization and versatility in node arrangements. It can be used to solve a variety of complicated engineering problems. A numerical example of adhesive contact between a micro elastic cylinder and a rigid half-space is carried out to show the feasibility of the algorithm. In the simulation, an effective method of the M-D model is used to save the cost of computation. Compared with the existed solutions, the results solved by the presented algorithm are reasonable.
Trajectory Generation of Spray Painting Robot Using Point Cloud Slicing
Authors: Li Ming Zhu , Lu Zhang Ping , Sha Chun Fa , Huang Li Qing
Published: December 2010

In the trajectory planning process of spray painting robot, an approach to automatic trajectory generation of spray gun using point cloud slicing is presented. Firstly, the point cloud data is obtained by scanning the surface of the workpiece. After the uniform slicing of point cloud model, the spraying position is determined by the average sampling of cross-section contours. Then the normal vectors of the sampling points are estimated. Finally the trajectory of spray gun is generated by offsetting the sampling points along their normal vectors. Experimental results show that the method has good feasibility and effectiveness. The spraying trajectory, direction and distance of spray gun can be controlled accurately, thus the spraying quality and efficiency are improved.
Finite Element Simulation of Cyclic Channel Die Compression with Route A
Authors: Shi Feng Jian , Xu Tao , Lu Sheng , Wang Lei Gang
Published: December 2010

In this paper, effective strain and load were simulated by rigid-plastic finite element method (FEM) during cyclic channel die compression (CCDC) with route A, and the optical microstructure was observed. The results show that large strain can be accumulated in the material by CCDC. The load variation includes two stages, slowly linear increase and rapid increase. At the end of the CCDC, the compression load rises rapidly. Apart from the edges of the specimen, the effective strain is higher in the central region and lower at the surrounding region. The effective strain gradient increases with the number of compression. Grain refinement at the central zone is faster due to the strain inhomogeneity. But the peripheral zone is also refined with the number of CCDC. This illustrates CCDC is a promising method for producing bulk ultra-fine grained materials.
Finite Element Analysis and the Topology Optimization of a Bracket-Cable
Authors: Ma Xun , Zhang Ji Wei
Published: December 2010

The bracket-cable is one of the important structures of transmission control system of Heavy Commercial Vehicle. By using the compliance (strain energy) as an object function and the volume as constrain, the topology optimization design for the bracket-cable is performed with Hyperworks10.0, which is made considering the characteristics of structure, constraints and forces etc. To meet the structural strength and stiffness requirements, 34.7% of the mass are decreased after the process. The generalization designing method of the structure of the bracket is also provided. The Structure analysis and the topology optimization based on the finite element method may help us get the best variation of the design during the developing phase. It has also significance to shorten the design process and to improve the product quality.
Design and Implementation of RF Front-End for GPS Receiver Utilizing Discrete Components
Authors: Ding Ji Cheng , Zhao Lin , Gao Shuai He , Xia Li Xiong , Zhang Jun Ling
Published: December 2010

A GPS radio frequency (RF) front-end based on discrete components is designed and implemented in this paper. Research on the structures of RF front-ends for GPS receivers, and an intermediate frequency (IF) digitalization front-end is expounded in details. Analyze the design considerations of filter bandwidth, sampling frequency, quantization bits, and automatic gain control, which would effect on the whole performance of RF front-end. Then, appropriate discrete components are selected, and a low IF RF front-end hardware platform with orthogonal structure is implemented. Test results indicate that the hardware platform combined with base-band module could effectively complete signals acquisition.
Design and Implementation of an Active Power Filter
Authors: Huang Jiao Ying , Gao Cheng , Yuan Hai Wen , Zou Hang
Published: December 2010

In order to compensate current harmonic in oil drilling power system, the design, development and experimental investigations of an APF were considered. Based on Fourier transform, a direct harmonic analysis algorithm was designed to identify and track harmonics. Compared with traditional FFT, the proposed algorithm was less dependent on hardware and could be used to for selective harmonic compensation. The laboratory prototype of the APF system was designed and implemented, which was tested in different operating conditions with nonlinear loads to demonstrate its effectiveness and capabilities for harmonic elimination. All experimental results are given and discussed in detail, which validate the proposed APF.
A Method to Improve Human-Computer Interaction for Shape Design, Based on Empirical Data
Authors: Wiegers Tjamme , Wang Chen Sheng , Vergeest Joris S.M.
Published: December 2010

Human-computer interaction is often mainly based on the requirements of the software. However, for optimal communication between computer software and its users, the interaction should also fit to the way people work best. To be able to improve interaction with shape modeling software, a study was performed to investigate how people describe shape. The goal is to use the results of the study to adapt the interaction of shape modeling software in such a way that it better connects to the way people think and speak about shape. The study investigates which terms people use to describe shapes and shape operations. Furthermore, it investigates the differences and similarities among subjects who name shapes and shape operations. The study was done among Chinese bachelor students. For this research, a list was composed, containing descriptions of shapes and shape operations. All items in the list were then presented in pictures. The subjects had to name the shapes and shape operations that were depicted by the pictures. The paper describes the research method and shows how the results are analyzed. Furthermore, some first results are shown. Finally, possible implications for future human-computer interaction are discussed.
Dynamic Characteristics Research of Self-Swinging Control System with Valve-Controlled Cylinder Device for Liquamatic Fire Water Monitor
Authors: Hu Guo Liang , Gao Zhi Gang
Published: December 2010

In order to satisfy the flexibility requirements of the fire fighting in some particular circumstances, a self-swinging control system with valve-controlled cylinder of the liquamatic fire water monitor was designed. The self-swinging control system was composed of water hydraulic cylinder, water hydraulic valve, water channel connection plate and mechanical feedback device. This controlled system was driven by the pressure water from the monitor body. The water hydraulic cylinder drives the monitor head to swing side by side, consequently, the cover areas of the jet water from the monitor head was increased. At the same time, the modeling and simulation analysis was carried out for the self-swinging control system using the AMESim software, the simulation results show that the self-swinging control system can self-swing in a particular frequency, and the frequency is increasing with the water pressure increasing.
Study on the Drawing and Trimming Springback Characteristics of Cylinder Shallow Shell of Tailor Welded Blanks
Authors: Jiang Yin Fang , Li Zhi Fei , Tang Zhen Zhou , Fang Lei
Published: December 2010

In this study, the springback law of generatrix direction, circumferential direction of tailor welded blanks (TWBs) cylinder shallow shell impact from blank holder force, punch profile radius and sheet thickness was researched by finite element analysis, which was compared with non-welded blanks. The results show that: in the circumferential direction, with the increase of blank holder force, the trimming springback of the tailor welded blank of the thickness combination of 1.2mm and 0.8mm (TWB1208) is decreased firstly and then increased, which is larger than that of the non-welded blanks of 0.8mm and 1.2mm. With the increase of punch profile radius, the drawing and the trimming springback of TWB1208 are both increased, and after trimming, the both springback are greater than that of the non-welded blanks. With the increase of the quadratic difference of thickness, TWB1208, TWB1612 and TWB1608, the drawing springback is decreased, and the trimming springback is gradually increased. In the generatrix direction, when blank holder force is less, the distortion deformation of TWBs is serious, and after the trimming, it is decreased according to the increasing blank holder force. With the increase of punch profile radius, the distortion deformation is larger. The greater the difference of thickness is, the more serious the distortion deformation is.
A New Formal Method of Anticorrosion Design
Authors: Zhao Peng Fei , Zhang Yi , Li Zong Bin , Yuan Xiao Yang
Published: December 2010

To solve the problem of anticorrosion design in early stage of manufacture, a formal method of anticorrosion design was proposed, and a formal model of conceptual design of anticorrosive materials was established by using hierarchical structure, individual color sets and unified color sets. Basing on the reasoning matrices which were established by using polychromatic sets theory, a formal reasoning method was proposed to realize the formal reasoning from the functional requirements to the selection of final scheme. This formal method of conceptual design for anticorrosion based on the polychromatic sets can make the design process of anticorrosion standardized, and facilitate the formal description of the reasoning process and its expression and operation in computer. The method made some useful explorationfor the CAPP integration design of anticorrosion.
Multi-Lookup Table Based Regenerative Braking Strategy of Plug-in Hybrid Electric Vehicle
Authors: Shi Qing Sheng , Zhang Xiao Ping , Chen Fuan
Published: December 2010

. In order to improve the energy efficiency of plug-in hybrid electric vehicles, it is important to design a suitable regenerative braking strategy. There are many control strategies that have been developed and presented for plug-in hybrid electric vehicles. Most of them are aimed to energy flow management, and seldom involves regenerative braking control. In this paper, a regenerative braking strategy based on multi-lookup table method is proposed for plug-in hybrid electric vehicles. Decelerations are introduced as the index of Table Selector, so braking force distribution coefficients can be flexibly adjusted using the proposed strategy. Finally, the simulation results show the validity of the novel strategy.
Multi-Objective Optimization Design of the Helical Gear Transmission Based on Coalition Cooperative Game Theory
Authors: Meng Rui , Xie Neng Gang , Han Xiao Jing
Published: December 2010

Considering helical gear transmission's economic performance and drive reliability, construct multi-objective optimization model of the helical gear transmission with taking normal module, teeth number of small helical gear, helix angle and the gear width coefficient as design variables and taking the volume of small and large helical gear and opposite number of overlap ratio as objective functions. Propose multi-objective optimization design method based on coalition cooperative game theory where the two design goals are seen as two game players. By calculating the impact factor of design variables to objective functions and fuzzy clustering, the design variables are divided into strategy space of game players. Each game player takes its own revenue function as target and does single objective optimization in its own strategy space in order to get its own best strategy. The best strategies of all players form a combination of one round game and the optimal solution can be obtained through several game rounds. Example results show the effectiveness of game method.
Application of Dual-Mode Switching Threshold Controller to Autonomous Carrier Robot
Authors: Wang Chao Hui , Zhang Xiang , Zhang Liang , Zhang Fei , Zhang Qun Ming
Published: December 2010

Cleaning the insulation coverings of high voltage power transmission is effective to prevent the flashover accident. This paper designed a climbing robot as carrier platform which composed of spiral wheel and covering. The control system consists of Single Chip Microcomputer (SCM), stepping motor and ultrasonic distance-measuring sensors. Based on switching threshold theories, a compound fuzzy-PID controller was studied. Then the mathematical model of automatic system was simulated by Simulink Toolbox of Matlab. Finally, data of carrier experiments based on closed loop control validated the effectiveness of the controller.
Analysis of Crankshaft Fatigue Strength Based on Integrated Finite Element Model
Authors: Chen Xiao Ping , Hu Ru Fu , Zheng Shu Hua
Published: December 2010

Aiming at the complex mechanical systems for the prediction of the fatigue limit load requirements, this paper examines the relationship among finite element analysis model and the performance models. And a finite element modeling method for fatigue analysis is proposed. The finite element model can support static, modal, fatigue, and multi-body dynamic response analysis in parallel and collaboration. This method helps improve the fatigue limit load analysis.
Error Compensation Based on Differential Operators and Electro-Optical Collimation
Authors: Hong Lin , Liang Yan Shu , Cong Meng
Published: December 2010

Theoretical analysis and experiment study on the pose error compensations of parallel mechanisms have been presented. A method for error compensations by means of differential operators and electro-optical collimation system is discussed. Compensation quantities oriented to main error sources from position coordinates of joints on the movable platform can be obtained through mathematic models. Compensation quantities provided by driving legs can be realized precisely by linear calibration techniques. Orientation angles can be measured by means of electro-optical collimation system and a three-dimension turning table, which is centrally positioned and can complete multi-direction inverse adjusting. Numerical example relevant to Stewart platform has been given. Simulation and experiment results indicate the feasibility of the method.
Intelligent Charger Design of Electric Bicycle Based on SCM
Authors: Wang Wen Cheng
Published: December 2010

In order to avoid the disadvantages of electric bicycle chargers and extend battery’s life, this paper proposed a design plan of intelligent charger based on SCM. It introduced the principle, the hardware circuit components and software flowchart in detail. According to the rechargeable battery sampling voltage and the electric current condition information, the SCM produces the appropriate PWM signal, achieves precise charge controlling of different stages, and it has the function of data displaying and overheating protection. Practice has proved that the charger can improve the charging efficiency and extend battery’s life effectively.
Discussion on the Vacuum Pre-Cooling Rate of Vegetables
Authors: Yu Kuang Cheng , Chang Hung Sheng , Lai Shyi Ming
Published: December 2010

The cold chain in low temperature logistics is closely related to modern life. Temperature control is required when vegetables and fruits are collected, and pre-cooling is the first step of the cold chain, so it is very important. Vacuum pre-cooling decreases the temperature of vegetables and fruits rapidly and uniformly as the water on the vegetable and fruit surfaces evaporates and takes away a large amount of heat. This experiment used vacuum to cool vegetables, kept the vacuum at 5.5~7 Torr, and examined the vegetables with humidification and without humidification before cooling to study their weight loss rate and cooling rate.
Numerical Calculation Analysis of Structural Parameters of Water-Lubricated Thrust Bearing
Authors: Zheng Lin Liu , Wu Zhu Xin
Published: December 2010

The affect of the thrust pad inclination and ratio of length to breadth (L/B) on the lubricity of a water-lubricated thrust bearing is studied in numerical method. The research results indicate that when the elastic deformation is considered, the distribution of both water film thickness and pressure presents to be paraboloid. With the increase of thrust pad inclination, both maximum water-film pressure and the friction coefficient increase, and the minimum water-film thickness decreases first and then increases; when the L/B increases in the range of 1~2, both maximum water-film pressure and the friction coefficient increase, but the minimum water-film thickness decreases.
Modeling and Simulation for Dual-Drive Transmission System of TBM Based on Bond Graph
Authors: Lin Chao , Su Xin Hong , Qin Da Tong , Yu Song Song
Published: December 2010

The dual-drive system to be used in the tunnel boring machine (TBM) is a new kind of high-power planetary transmission system. On the basis of the system’s transmission theory and the bond graph principle, the bond graph model of the dual drive transmission system is established and then the state equations are deduced. Based on this model, dynamic performance of the system is simulated by means of MATLAB/Simulink and the dynamic response curves of the speed and torques are acquired. The simulation response illustrates that the bond graph model of dual drive transmission systems is accurate. In addition this system is suitable for three types of TBM and can satisfy the requirements of dramatic changes of load in the running of TBM.
Analysis on the Design and Application of Prestressed Concrete Supporting Piles
Authors: Yu Dong Ming , Liu Zhi Qin , Chen Feng Guang
Published: December 2010

The supporting piles of deep foundation pits are usually made in reinforced concrete materials and rarely in prestressed concrete materials. But prestressed concrete materials have higher stiffness and less deformation and are suitable for controlling displacements or settlements. So, in this paper a practical engineering project as an example, the prestressed concrete supporting piles of the deep foundation pit are calculated and designed. Then, the settlement and inclination of the building adjacent the foundation pit with the prestressed concrete piles are calculated in the numerical software, FLAC. The results calculated in FLAC are compared with the actual settlement and inclination of the adjacent building during the foundation pit is excavated. The comparison confirms the feasibility of the supporting structure. This is a useful trial on the design of the prestressed concrete supporting piles.
Design of Status Monitor System for the Locomotive Bearings Based on WSN
Authors: Shen Fang , Lou Hai Bin , Wang Kuan , Wang Zhao
Published: December 2010

The rolling bearing is one of the key parts of the locomotive running components, because it’s running status is directly related to the performance and safety of locomotive. In this paper, ZigBee Wireless Sensor Network (WSN) technology is introduced. The framework，hardware circuit and software layer of the sensor node was researched in detail. The characters of chips and the realization of Zigbee protocol stack also described．Then, the status monitoring system for the locomotive bearings based on WSN is designed. It can monitor the work status of the rolling bearing and realize to alarm for instant fault. This system can also be improved for the other vehicle.
The Research on the Driver Steering Behavior under Emergency
Authors: Chen Xue Mei , Wei Zhong Hua , Gao Li , Wang Xi
Published: December 2010

Drivers are used to steering when they meet obstacles in order to protecting the measure and lives. Freecod-data collector, dynamics GPS and the sensors of steering degree was utilized to study the rule of driver steering velocities, the relationships between maximum steering velocities and distance, and as well as maximum steering velocities and driving velocities were eastablished. The results show that drivers steering operation includes five periods and also indicates that driver maximum steering velocities is changing with distance in nagitive and driver maximum steering velocities is changing with distance in positive-linear. The regressive formulas were also given. This research help us to comprehend driver behavior under emergency.
Fault Signature Analysis Based on Transient Current for Induction Motors
Authors: Lv Feng , Sun Hao , Du Wen Xia , Li Shue
Published: December 2010

The characteristics of broken rotor bars in induction motors are reflected in the abnormal harmonic of the stator current. At present, fast Fourier transform( ) and time-varying frequency spectrum analysis method are used in such fault diagnosis, but non-stationary motors operation can bring a certain difficulties to the monitoring and diagnosis. This paper studies the basic characteristics of wavelet transform, adopting the wavelet analysis technologies of signal processing and selecting mother wavelet, the paper makes the multi-scale transformation to the motor starting current, excavates the harmonic informations on non-stationary condition, realizes fault diagnosis of motor broken rotor bars effectively, The consistent diagnostic results prove the effectiveness of the method.
Gapping Factor Analysis of Heavy Hydraulic Press with Whole Pre-Tightening Assembled Frame
Authors: Duan Zhi Dong , Wu Jian Jun
Published: December 2010

Whole pre-tightening assembled frame with multi tension bolts, the main form of heavy hydraulic press, will gap at the junctions of upper beam and columns when it is subjected to allowable loads, which has great influence on stability of assembled frame and processing quality of forgeable piece. A model of assembled frame with 10 tension bolts was built to research the effect of residual pretension coefficient, relative stiffness coefficient and distribution of tension bolts on gapping by means of numerical simulation. Relative gapping coefficient and relative potential gapping coefficient were introduced to measure the extent of gapping. Our studies indicated that residual pretension coefficient was the most important influence factor, while distribution of tension bolts had little influence on extent of gap.
Global Radiation for Solar Architecture Design of Taiwan
Authors: Ou W.S. , Huang K.T. , Liao Chi Chang
Published: December 2010

Solar radiation data is an important consideration factor in building environment planning. This study focused on the regional characteristics of global solar radiation of Taiwan. The research utilized the raw meteorological data meseaursed by the Central Weather Bureau to establish reliable solar radiation data of weather stations by means of statistic analysis. A total of weather station’s data are used where their geographical location are evenly distributed from northern to southern Taiwan. The results of this study will presented the diagrams of annual and monthly averaged solar radiation in Taiwan. Geographical distribution of inter-annual trend of global solar radiation during this period was also presented in this paper. It can be used for further study of the climate zoning comparing with other climate conditions. Furthermore, researchers of solar cell design, building energy, shading design, site planning, etc. can utilize the distribution diagram to fetch reliable solar radiation values to carry on reasonable quantitative analysis.
Risk Study on Subway Construction Based on Reliability Theory
Authors: Zhao Ping , Hao Feng Tian
Published: December 2010

This paper described the present risks existing in subway construction and proposed the idea that reliability theory can be applied in the field of subway construction. Based on this, a parallel-series model of risk control system was established. According to the required target of system reliability, combining with the reliability distribution theory, the reliabilities of each subsystem that constituted the parallel-series model can be determined. Aiming at the basic events that constituted the subsystem, average allocation method was taken to solve the basic events reliabilities and an example was given. This studies showed that reliability theory can be successfully applied in the field of subway construction and can fulfill the optimization of construction safety under a given security target.
Analysis on Cogging Torque of Permanent Magnet Synchronous Motor for NC Machine Tool Servo-System
Authors: Yu Shen Bo , Dong Hui , Feng Xin , Yuan Jing
Published: December 2010

This paper presents a procedure of calculating cogging torque of Permanent Magnet Synchronous Motor (PMSM) for NC machine tool servo-system based on finite element method (FEM). Simulation models of PMSM are established to complete coupled calculation between magnetic fields and mechanical dynamics. Furthermore, the distributions of magnetic flux and electromagnetic force densities are also gained. Finally, the cogging torque of the motor in operating process is suppressed by changing slot opening configuration. The references for the optimization design on NC machine tool servo-system are provided by the simulation model.
Research on the Half-Real Simulating Experimental System of the Automotive Power System
Authors: Li Hong Bin , Yu Jing Nuo
Published: December 2010

In order to test the performance of the Automated Mechanical Transmission (AMT) system with low cost, a half-real simulating experimental system of the automotive power system is developed. In which, the gearbox is real part, a small inertia flywheel is used to simulate the inertia of the real automotive. So a low power motor whose torque is controlled by a transducer is adopted to simulate the engine, a low power magnetic powder brake is used to replace the high-priced dynamometer. The control software is programmed using visual basic language. Experimental results show that the performance of the AMT system could be validated effectively by this system
Design and Optimization of a Piezoelectric Thrust-Measuring Platform for Attitude-Control Rocket Engines
Authors: Xing Qin , Zhang Jun , Qian Min , Jia Zhen Yuan , Sun Bao Yuan
Published: December 2010

A piezoelectric thrust-measuring platform with high natural frequency is developed for measuring the pulsed thrust generated by attitude-control rocket engines. It consists of two shear mode piezoelectric quartz crystal sensors and an integral shell. The sensors are inserted into the grooves of the elastic rings with an interference fit. Shell stiffness is calculated by energy method (EM) and finite element method (FEM). The shell is optimized for obtaining a good compromise between the sensitivity and frequency response. The stiffness and natural frequency after optimization are verified by experiments. The results show that the stiffness calculated by FEM is more accurate than that calculated by EM. The sensitivity of the thrust-measuring platform is increased by 13.6% compared with before optimization. The natural frequency of the thrust measurement system is 1245 Hz.
The Numerical Simulation of 2D Sloshing Tank
Authors: Gao Song Qiang , Feng Da Kui , Hu Jing , Zhang Zhi Guo , Xiang Gong
Published: December 2010

In this study, a two-dimensional numerical method based on the volume of fluid method is used to solve for water sloshing. The 2D equations of fluid motion are derived in a moving coordinate system. For modeling impact pressure induced by large amplitude sloshing, an emphasis is given to the numerical treatment of the free surface, which is sensitive to the simulation. Liquid sloshing inside a rectangular tank is simulated. The time histories of the free surface shape and the dynamic pressure inside the tank are obtained. The results are compared with an experimental data. These comparisons show that this method can be used to simulate the sloshing induced impact loads. Then series of violent sloshing phenomenon is given and compared.
A Method Research of Intention Expression Based on Design State
Authors: Yu Ming Jiu , Yu Sui Huai , Lu Chang De
Published: December 2010

Computer aided design system has provided effective help in alleviating the designer with heavy manual labor and raising efficiency and quality, but not in the field of industrial design for designer with professional support, mainly because the present software couldn’t remain synchronization with designer’s intention. In this paper, response to the requirements of providing dynamic design resources, expression is researched from the view of design state, and by the demand and analysis traces the design process history information, design intentions expression method is researched on the basis of design state, at last design intention expression model is built.
Evaluating the Effectiveness of Applying Phenolic Resin as Thermal Barrier in Buildings during Summer and Winter
Authors: Chen Ting Yu , Sung Wen Pei , Shih Ming Hsiang , Zhao Yu Kuang
Published: December 2010

Taiwan is limited in space with dense population, and is located in sub-tropical region with high ambient temperature and humidity. In this research, the phenolic resin is proposed as building materials to use its thermal insulation property for developing a comfortable living and working indoor environment. The phenolic resin is an environmental friendly material, and an excellent thermal barrier. The literature also points out that using phenolic resin plates in buildings will decrease or increase the indoor room temperatures by 1°C during summer and winter, respectively, with 10% savings of energy consumption. In this research, the effectiveness of applying phenolic resin as building materials is evaluated for both winter and summer conditions. The results show that the daytime indoor temperature is 5-8°C lower than outside temperature in summer whereas the indoor temperature can be maintained at 20-22°C in winter..
Scheme Selection of Product Energy-Saving Design Based on Data Envelopment Analysis
Authors: Dou Run Liang , Li Ting
Published: December 2010

A scheme selection method on the base of super efficiency DEA (DEA, data envelopment analysis) is put forward in order to design an energy-saving product. Firstly, a fishbone figure from the point of view of life cycle is established for the sake of analyzing energy-consumption factors systematically. Secondly, as the restriction of basic DEA model, super efficiency model of DEA is referred to choose the potentially energy-saving project. In view of the high difficulty in acquiring energy-consumption factors, this paper takes all the factors into account to select the scheme of energy-saving design. Finally an example of a blade at the stage of manufacture is introduced to illustrating this model. The achievements above solve the problem of the selection of energy-saving scheme, which provide significant references for product energy-saving design.
Study on Energy Spectrum Analysion of Three Kinds of Traits of Haematitum
Authors: Xiong Nan Yan , Jiang Yan , Wang Yong Yan , Zhou Ji Hong , Wei Cui Ling
Published: December 2010

Object: Three kinds of traits of haematitum including the crude and processed drugs are analyzed and compared in this paper. Methods: By SEM/EDS method, experiments are conducted on phase, morphology, grain size and surface trace. Results: The comparison table of trace elements and the scanning electron micrographs of the six samples are achieved in this paper. Conclusion: It shows that there are different among the haematite of three different properties whether the crude or processed drugs. It needs further study whether all these Haematitum can be used as one mineral medicine.
Treatment of Steel Rolling Oily Wastewater: Performance of a CTAB Modified Resin Fixed Column
Authors: Ma Song Jiang , Jia Hai Wu , Li Fang Wen , Fu Mei Ling , Wu Xiang Jiang
Published: December 2010

The effect of operating conditions on the performance of a CTAB modified resin column used for the treatment of steel rolling oily wastewater was investigated. The influence of flow rate, influent oil concentration, fixed column height and influent pH was studied. Experimental results showed that several processes were involved in oil removal from rolling oily wastewater, i.e. emulsion breakdown, coalescence and adsorption. More than 95% of oil content in the influent stream was removed by the modified resin column and it increased by 15% compared with the unmodified resin column.
Preparation and Characterization of Nano-Strontium Titanate Based on Glass Fiber Filter and its Application in Adsorption of Heavy Metals
Authors: Zhang Dong
Published: December 2010

Nano-strontium titanate based on glass fiber filter (GFST) was successfully prepared by sol-gel method and characterized using XRD and SEM. The adsorptive potential of GFST for heavy metal ions, such as lead, cadmium, zinc and nickel, was investigated. The results showed that the nano-strontium titanate could crystal based on glass fiber, gaining a new block adsorbent like a leaf. The lead, cadmium, zinc and nickel ions were quantitatively retained at pH 6-9; their adsorption capacities of GFST for lead, cadmium, zinc and nickel ions were 153.21 mg•g-1, 8.32 mg•g-1, 21.36 mg•g-1 and 4.80 mg•g-1, respectively. The adsorbent can be regenerated completely by elution with 0.5 mol•L-1 HNO3. The adsorbent has a promising prospect in removal or enriching of lead, cadmium, zinc and nickel ions in water.
Dynamic Scheduling Method for Steelmaking-Continuous Casting
Authors: He Dong Feng , Xu Ai Jun , Yu Gang , Tian Nai Yuan
Published: December 2010

A method of dynamic scheduling of steelmaking-continuous casting is proposed, which includes static scheduling based on genetic algorithm and dynamic scheduling based on scheduling rules, mathematical model and complete rescheduling utilizing genetic algorithm. The simulation with eight hours’ production data in S steel plant showed that the method could draw quickly a high quality and performable dynamic scheduling plan according to random production disturbance. The average utilization rate of converter could reach 95% and the generation period of initial scheduling is less than 3 minutes. The max dynamic scheduling adjustment period did not exceed 1 minute.
Study on the Synthesis of Lithium Titanate Compound as Anode Material for Lithium Ion Battery
Authors: Ruan Yan Li , Cheng Bo Wen
Published: December 2010

Lithium titanate compound, Li4Ti5O12 was prepared by a solid state reaction. The raw material, the calcination time, the atmosphere of the reaction and other conditions were investigated. The crystal structure and the electrochemical performance of the synthesized materials were characterized by X-ray powder diffraction (XRD), laser particle-size distribution measurement (LSD), and electrochemical performance testing. The XRD patterns showed peaks attributable to Li4Ti5O12 phase for the sample prepared by LiOH•H2O, while there was impurity peak in the pattern of the sample prepared by Li2CO3. The precursor was sintered at various times of 12h and 24h at 800 °C. The galvanostatically charge and discharge tests show that the capacity and the cycle performance of the latter is obviously more excellent. The atmosphere of the reaction hasn't exerted a great influence on the performance of the material.
Effect of Different Crushing Methods on Gradation and Particle Shape of Recycled Aggregate
Authors: Xu Yi Dong , Xu Rui Ping
Published: December 2010

Based on the current production line of artificial aggregate, the waste concrete derived from the same source was crushed by different crushing machine, jaw crusher and impact crusher. This paper focuses on the effect of different crushing machine on gradation and particle shape of recycled aggregate. As is shown by the results, recycled aggregate produced by two crushing methods can satisfy the requirements of specifications. Compared with the recycled aggregate produced by impact crusher, the coarse recycled aggregate produced by jaw crusher have less length/breadth ratio and higher thickness/breadth ratio; particle shape can come closer to round.
Preparation and Characterization of Polyacrylonitrile-Polyaniline Blend Nanofibers
Authors: Pan Wei , He Xiao Wei , Chen Yan
Published: December 2010

Composite nanofibers of polyaniline doped with dodecylbenzene sulfonic acid (PANI-DBSA) and polyacrylonitrile (PAN) were prepared via an electrospinning process. The surface morphology of PANI-DBSA/PAN nanoﬁbers was characterized using scanning electron microscopy (SEM). Differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) were used to investigate the hydrogen bonding and miscibility behavior of the blend. It was found that the average fiber diameter of composites nanofiber was increased with the increase of PANI-DBSA content. The formation of the hydrogen bonding between PAN and PANI-DBSA was identified by the FTIR spectra
The Development of High Strength Hull Steel Plate FH40
Authors: Gao Xiu Hua , Du Lin Xiu , Qiu Chun Lin , Yang Yong Da
Published: December 2010

High strength hull structural steel plate FH40 has been successfully developed by a 3500mm plate production line. Low-carbon micro-alloying niobium elements and TMCP (thermo-mechanical controlled processing) were employed to refine the grains and improve mechanical properties. This paper investigated the effects of TMCP process on the microstructure and mechanical properties of the rolled FH40 plate. Results indicate that the treatment could significantly improve the mechanical strength and impact toughness of the steel and the impact ductility was further enhanced after strain aging. The properties of plates remarkably satisfied with the requirements of the national standard of china and rules requirements by shipping classification associations.
Study on Thin Extended Octagonal Ring Elastomer
Authors: Cao Qing Hua
Published: December 2010

In order to optimize octagonal ring elastomer, the structure and work principle of thin extended octagonal ring elastomer is briefly presented, the corresponding model is established by material mechanics, the analysis of stress and strain is discussed by finite element and the critical parameters is found. It is practical for octagonal ring elastomer improving the performance .
Study on Stress-Strain Constitutive Relations of Longitidinal Compressing Elm Wood
Authors: Song Kui Yan , Liu Xue Shen , Li Jian
Published: December 2010

Through longtitudinal compressing juvenil and mature elm wood after hydrothemal-microwave treatment, stress-strain constitutive relations were established, the results show that at the beginning of compressing, namely, in the elastic region, the curves of stress and strain coincide with Hooke law, in the elastic-plastic region, it also satisfies a linear mechanic relationship. And this paper also analysed the causes of great gap between juvenil and mature elm wood after longtitudinal compressed were due to the different ratio of cell wall to cavity and thickness. A scanning electron microscopy was used to observe the folds of wood cell wall before and after longtitudinal compressed, then the varial law of elasticity and elastoplasticity after compressed were found, also the mechanism of wood longtitudinal compressed was revealed.
The Fiberboard of Hot Pressing Process Optimization and Combination Performance Characterization
Authors: Guo Ming Hui , Hu Jian Peng
Published: December 2010

To pack a certain quality ratio ammonium lignosulfonate / urea as a filler into the natural wood fiber, Using flat pressure process fiberboard materials, Optimize the hot pressing technique that the filler is 20% (The quality ratio of lignosulfonate/ urea is 5: 3), slab moisture content is 13%, hot-pressing temperature is 190°C; hot-pressing time is 7 minutes, hot-pressing pressure is 2MPa and 1% paraffin emulsion. Verifying test results show that mechanical performance is stable and reliable process. Analyze the reactivity of fiberboard packing, fiber gathered, the microstructure of interface properties with the application of FTIR, XRD and ESEM and other modern instrument analysis technology.
Solid State Synthesis and Characterization of Spintronics Material Cd0.55 Hg0.45 Te
Authors: Asghar H.M.Noor Ul Huda Khan , Asghar M. , Awan M.S.
Published: December 2010

Polycrystalline spintronic material (Cd0.55Hg0.45Te) was synthesized by conventional solid state reaction. The samples ( = 5 mm and T = 1.5 mm) were prepared by uni-axial pressing. Samples were melted at 800°C for 3-2 hours. For chemical analyses, surface morphology and structural analyses, scanning electron microscopy (SEM) equipped with EDX system and X-ray diffraction studies were performed. XRD confirmed the cubic crystal structure. The Lattice constant of (Cd0.55Hg0.45Te) as determined by XRD was 0.6464 nm. The Miller indices (hkl) have been found by using crystallography method. The observed planes were (200), (210) and (331). The EDX analyses showed the typically compositions: Te 24.8% Cd 14.8% Al 5% and O2 46.4 % & C 9% (3 hours treatment) and Te 28.1% Cd 16% Al 4.1% and O2 39.3 %, Si 0.360% & C 12.1% (2 hours treatment) however we could not find any representative peak for Hg in all of the EDX analyses.
The Effects of Young’s Modulus of Materials on the Rolling Resistance Characteristics of Ball Bearing
Authors: Hu Rui , Liu Zuo Min , Xu Chun Xia
Published: December 2010

The effects of Young’s modulus of materials on the rolling resistance characteristics of ball bearing have been investigated by experimental,analytical and numerical method. Results show that the Young’s modulus of ball bearing greatly affects its rolling resistance characteristics and the characteristic values of the rolling resistance characteristics will decrease with the increase of the Young’s modulus of ball bearing, for example, the elastic power consumption of the ZrO2 bearing is about 80 percent of the GCr15 bearing, and that the effects mainly reflects on three aspects: the elastic hysteresis of the material, the contact stress and deformation in the contact region.Results are helpful to the design of materials compatibility of ball bearing.
Effect of Different Clamping Modes on Dimples of Sheet Metal Parts in Multi-Point Stretch Forming
Authors: Chen Xue , Li Ming Zhe , Cai Zhong Yi , Fu Wen Zhi
Published: December 2010

Dimples are a typical defect in multi-point stretch forming (MPSF) of sheet metal. Comparison on the numerical simulation of the spherical parts in MPSF with traditional and flexible clamping modes were done, the effects of transition zone length and elastic cushion on the dimples of the spherical parts were studied. The results show that thickness strain of the forming parts using traditional clamping mode is greater than that using flexible clamping mode under the same forming conditions, so the dimpling depth of the former is relatively deeper than that of the latter. With the increasing transition zone length, dimpling gradually becomes shallow. Dimples of the parts are reduced and forming quality of the parts is improved using flexible clamping mode compared with traditional clamping mode under the same transition zone length. The technique of elastic cushion is a method to restrain dimples, and no-dimpling limits of the parts was obtained, the dimples defect can be eliminated using the relatively thinner elastic cushion with flexible clamping mode than that with traditional clamping mode, so the shape error of the parts can be decreased.