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机械设计,基于有限元的新型电动汽车一体化电动桥疲劳寿命分析

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基于有限元的新型电动汽车一体化电动桥疲劳寿命分析

Fatigue Life Analysis of a New Electric Vehicle Integrated Driving Axle Based on FEM

自费出版哪里可靠

摘要:自费出版提出一种新型的电动汽车一体化电驱动后桥,并进行桥壳疲劳寿命和模态有限元分析。基于ANSYS Workbench协同仿真平台建立一体化后桥有限元模型,在最大载荷工况下对桥壳进行静力学分析,得到桥壳应力和位移分布规律;进而对桥壳进行疲劳寿命和模态分析,得到桥壳各部分疲劳寿命和安全系数以及1-6阶固有振动频率;有限元分析结果表明,电驱动后桥具有足够的静强度和刚度,疲劳寿命达到国家标准,不会产生共振破坏。
关键词: 电动汽车;电驱动后桥;模态分析;疲劳寿命
LI Congbo*, ZHAO Laijie, LI Yue, CHEN Wenqian
(  State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030;  )
Abstract: A new type of integrated electric drive rear axle for electric vehicle is presented. The fatigue life and modal of the rear axle is analyses. The finite element model of the integrated rear axle is established based on collaborative simulation platform ANSYS Workbench. The distributions of stress and displacement are obtained. And then, the 1st to 6st natural frequencies, fatigue life and safety factor of the drive axle housing are determined through the analysis of the fatigue life and modal. The result of the FEA shows that the electric drive rear axle has adequate strength and stiffness. Also the electric drive rear axle’s fatigue life meets the requirement of national standard and the resonance failure cannot emerge.
Keywords: electrical vehicle; electric drive rear axle; modal analysis; fatigue life

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