电池布局对微型电动汽车车架力学性能的影响分析

摘要

To improve the mechanical performance of a mini electric vehicle frame,the battery layout is introduced into the design of the frame structure.The initial finite element model of frame structure to meet the assembly layout and the actual driving requirements is established with ANSYS/Workbench software,based on the structure of the mini electrical vehicle frame and the mechanical characteristics.Multiple battery layout is chosen with sensitivity analysis.The total deformation and the equivalent stress in a variety of typical operating conditions and natural frequency and vibration type in multiple pre-stress modes are analyzed and compared According to the analysis results,the loads in the position 6 and the position 7 have more sensitive effect on the total deformation and the equivalent stress proportional to the loads,so the batteries are arranged in the position 5 and the position 8.Scheme 2 is the best solution in three selected schemes through comparative analyses.And all these provide reference and theoretical basis forthe assembly layout of amini electrical vehicle developed by Tangshan Key Laboratory of electric vehicle.%为了提高车架的力学性能,将电池布局引入到电动汽车车架的结构设计中.针对电动汽车车架的结构及受力特点,基于ANSYS/Workbench有限元分析软件,建立满足各总成布置和实际行驶要求的车架有限元模型,应用灵敏度分析选取多种电池布局,对比分析典型工况下车架变形、应力分布和预应力模态下车架固有频率、振型.结果表明:位置6、位置7载荷对车架变形、等效应力的改变敏感程度更高,与之呈线性正比关系,故将电池布置在位置5、位置8;对比分析选取的三种方案,得出方案2为电池布局最佳方案,为唐山电动汽车重点实验室研究微型电动汽车总成布置提供了参考和理论依据.