Simulation Analysis And Reseach Of The Impact Performance Of Pure Electric Vehicle

With the rapid development of the automotive industry and the transport industry,vehicle population increase rapidly,and traffic accidents are happening with increasing frequency.The traffic accident can brought serious disaster to people's life and the property.Researching on vehicle collision safety performances,improving its crashworthiness has become an important topic attended by various countries' automotive industry.In order to enhance vehicle's collision safety performance,developing the related design and simulation technologies are some problems to be promptly solved.First,simulation methods of vehicle passive safety are analyzed and the basic theory of the dynamic explicit finite element analysis is described in this paper.The basic theories of the dynamic explicit algorithm were introduced.Contact algorithms,hourglass control,time-step control and the initial penetration problem are discussed.The vehicle model was established by the shell elements,solid elements and beam elements.The component property and material type were defined,then the vehicle finite element model was developed which is universal to reflect the structural characteristics of vehicle parts.According to the CNCAP evaluation criteria,the vehicle body velocity and acceleration were analyzed.Comparison of simulation results with experimental results shows that the CAE model is accuracy.In order to analyze the dummy injure during the vehicle's collision,the FEA dummy model and constrain system were tried to combine with whole vehicle model.After getting the dummy injure critical value,the analysis results were compared with the experimental results obtained through CNCAP the front rigid barrier vehicle collision test.The results have verified the accuracy of the calculation model and the feasibility of such analysis methods.