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

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Abstract 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.

Key words： battery bracket multi-body dynamics virtual iteration durability analysis

Received: 27 November 2018 Published: 28 April 2020

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	Articles by authors
	GE Wentao
	HUANG Hui
	DUAN Longyang
	LIU Zhou
	QIU Xing
	BI Pengfei
	CHEN Weihuan

Cite this article:

GE Wentao,HUANG Hui,DUAN Longyang, et al. Dynamic load simulation and fatigue analysis of a pure electric light truck battery bracket based on measured road load spectrum [J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(9): 267-273.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I9/267

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