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4081.汽车覆盖件成型的数字模拟技术应用研究
[汽车制造业] [2014-03-25]
This study explored the numerical simulation technique and its application range.By using numerical simulation technology,the automobile achieves mold design and optimization in the software,determines a more reasonable technological parameters and provids a useful reference to the mold design and the process of program development.The test shows that with the help of dynaform software to realize the design and optimization of the mould and make a simulation and analysis of its forming processes,through the simulation,the optimized blank is got,the numerical simulation of the cover to some degree has a guiding significance in the actual production.
关键词：汽车；数值模拟；模具设计；同轴开关
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4082.消声器结构尺寸与声学性能影响研究
[汽车制造业] [2014-03-25]
Based on software GAMBIT,GT-POWER,SYSNOISE,through comprehensively using finite element and boundary element method,simulating and analyzing the acoustic performance for the basic noise reduction unit,establishing the finite element model,comparing the frequency and noise reduction of different volume ratio of cavity and throat tube.Simulation analysis and experimental results show that the resonant structure parameters have a direct effect on its resonant frequency and noise reduction amount,the relationship characteristic between them is that the ratio more bigger,the requency and noise reduction amount more bigger,too.And draw the two relation formulas through calculation.
关键词：汽车；消声器；声学性能分析；建模与仿真
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4083.不锈钢管冷轧工艺过程的有限元仿真分析
[黑色金属冶炼和压延加工业] [2014-03-25]
关键词：钢铁；不锈钢；冷轧；FEM
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4084.基于GPS和GMS的智能跟踪辅助系统设计
[汽车制造业] [2014-03-25]
With GSM (Global System for Mobile Communications) and the QT cross-platform development tool,we design an intelligent tracking and assistance system.The system consists of the user and the terminals.The user can track the old,while the terminal can send alarm messages to the user when the old press the alarm button.We design and implement the display,alarm,help and query functions.Also,the system has good portability and scalability.
关键词：汽车；智能跟踪；GPS；GMS
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4085.单肋式箱形截面钢弓弦拱桥面内和面外的不稳定耦合分析
[建筑业,黑色金属冶炼和压延加工业] [2014-03-25]
Steel single rib box section arch bridge is established on the basis of secondary development using parametric language of large-scale finite element software ANSYS.On the premise of same sectional area A of arch rib,height breadth ratio h/b is changed,and both the spatial instability mode under the condition of arch bridge's dead weight and the stability safety coefficient under the condition of the first step instability mode is calculated.With the aim to optimize distribution of stiffness and stability of single rib arch bridge,the target is to find out a height breadth ratio h/b which can make in-plane and out-plane instability mode coupling,that is to say,equivalent stiffness of in-plane and out-plane of the mode.
关键词：钢箱单肋拱桥；不稳定模式；安全系数；ANSYS；抗弯刚度
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4086.对850℃时效处理下2205双相不锈钢金属间相的定量分析
[黑色金属冶炼和压延加工业] [2014-03-25]
The precipitates in 850℃ aging 2205 Duplex stainless steel were extracted by the method of carbon extraction replicas.The method makes precipitates disperse uniformly and the contrast between precipitates and matrix distinct.TEM(Transmission Electron Microscope),EDS(Energy Dispersive Spectrometer) and SEM (Scanning Electron Microscope) were applied for the observation ofmicrostructure.The SEM micrographs were used for intermetallic size statistic,which revealed that the sizes of intermetallic increased with aging time.
关键词：钢铁；2205双相不锈钢；850℃时效处理；金属间化合物；碳萃取
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4087.模糊控制系统下主动悬置引擎控制线路的应用
[汽车制造业] [2014-03-25]
An automobile power-train active mount system with a piezoelectric stack actuator is introduced.The influence caused by power-train to the body of the car is analyzed by means of parameter self-tuning fuzzy PID control,on which the simulating results are based.It turns out that this control scheme can restrain the influence better caused by power-train to the body of the car.
关键词：汽车；主动悬置；PID；模糊控制
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4088.AISI1005钢在气体保护金属极电弧焊中计算模型的结构演化
[黑色金属冶炼和压延加工业] [2014-03-25]
A fully coupled (two-way), transient, thermal-mechanical finite-element procedure is developed to model conventional gas metal arc welding (GMAW) butt-joining process. Two-way thermal-mechanical coupling is achieved by making the mechanical material model of the workpiece and the weld temperaturedependent and by allowing the potential work of plastic deformation resulting from large thermal gradients to be dissipated in theform of heat.
关键词：钢铁；AISI1005；有限元模型；气体保护金属极弧焊；对接焊接；结构演化
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4089.基于CATIA环境的虚拟装配车门的人因分析
[汽车制造业] [2014-03-24]
Based on CATIA software to create a virtual car assembly line,the virtual assembly technology briefly analyzed state development,pointed out the role of actual production used virtual assembly technology,combined an instance of the car door assembly works with lots of human factors analysis.Through assembly modeling,simulation,analysis and optimization,aimed to reduce labor intensity,decline action fatigues,acquire the best assembly path to improve the productivity and quality of assembly of the car assembly quality.
关键词：汽车；虚拟装配；汽车装配；CATIA；人因分析
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4090.基于遗传算法的汽车动力传动系统多目标优化研究
[汽车制造业] [2014-03-24]
Simulation model of automobile power train has been built using ADVISOR,on the basis of Genetic Algorithm Tool Box,the paper takes a mini car as example to carry out performance simulation calculation and power train parametric optimization design.The result show that automobile power performance and fuel economy and emission performance have been greatly improved. It is an important approach to optimize its matching parameters on reducing the fuel wastage,improving dynamical performance and decreasing the emission of waste gas. It is a better approach to cope with automobile power train match optimization by integrating ADVISOR's accurate simulation with Genetic Algorithtn's searching optimization with high efficiency.
关键词：汽车；汽车动力传动系统；ADVISOR；多目标优化
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