基于实测道路谱的纯电动轻卡电池包支架动态载荷仿真及疲劳分析  

Dynamic load simulation and fatigue analysis of a pure electric light truck battery bracket based on measured road load spectrum

作　　者：葛文韬 黄晖[1] 段龙杨 刘洲[1] 邱星[1] 毕朋飞 陈为欢[1] GE Wentao;HUANG Hui;DUAN Longyang;LIU Zhou;QIU Xing;BI Pengfei;CHEN Weihuan(Product Development&Technical Center,Jiangling Motors Co.,Ltd.,Nanchang 330000,China)

机构地区：[1]江铃汽车股份有限公司产品开发中心,南昌330000

出　　处：《振动与冲击》2020年第9期267-273,共7页Journal of Vibration and Shock

摘　　要：为保证纯电动轻卡电池包支架的疲劳寿命分析与实车试验场道路耐久试验的关联性,提出了一种将多体动力学、疲劳寿命分析及试验场实测道路谱数据相结合的分析方法。采用ADAMS软件建立了由七通道虚拟试验台、电池包支架及整个车架组成的刚柔耦合多体动力学模型,以试验场采集的电池包支架加速度为目标响应信号,采用Femfat.lab软件使用虚拟迭代方法,反求得到了电池包支架疲劳分析的载荷边界条件。采用Miner线性疲劳损伤理论在疲劳仿真软件nCode中分析了电池包支架的疲劳寿命,分析结果显示其寿命能够满足疲劳性能要求,并最终通过了实车试验场道路耐久试验的验证,验证了此方法的工程实用性。所提出的分析方法对于研究电动汽车电池包支架的疲劳性能具有重要的参考价值。In order to keep the relevance between the analytical durability analysis of a pure electric light truck battery bracket and its durability test on proving ground,an analysis methodology combining the multi-body dynamics,durability analysis and road spectrum measurement on proving ground was proposed.A rigid-flexible coupled multi-body dynamics model composed of seven channels virtual test-rigs,the battery bracket and the whole frame was built by using ADAMS software.By applying virtual iteration technique and Femfat.lab software,and taking the measured battery bracket acceleration signal on proving ground as a target response signal,the load boundary used for the fatigue analysis of battery bracket was back-calculated.The fatigue life of the battery bracket was analysed by using the fatigue simulation software nCode with the Miner Counting Algorithm.The analysis results show that the fatigue life can satisfy the requirement,and meantime,the battery bracket has ultimately passed the durability validation of proving ground,which verifies the engineering practicability of this methodology.The methodology has important reference value to the fatigue property analysis of electric vehicle battery brackets.

关 键 词：电池包支架 多体动力学 虚拟迭代 疲劳寿命分析 

分 类 号：TH113[机械工程—机械设计及理论]