FATIGUE LIFE ANALYSIS OF DIFFERENTIAL CASE OF ELECTRIC DRIVE ASSEMBLY BASED ON ACTUAL LOAD SPECTRUM (MT)

ZOU XiHong; GOU LinLin; XIONG Feng; WANG Chao; JIANG MingCong; LIN YuQiang; WANG WanYing

doi:10.16579/j.issn.1001.9669.2023.01.028

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FATIGUE LIFE ANALYSIS OF DIFFERENTIAL CASE OF ELECTRIC DRIVE ASSEMBLY BASED ON ACTUAL LOAD SPECTRUM (MT)

更新时间：2023-07-28

- FATIGUE LIFE ANALYSIS OF DIFFERENTIAL CASE OF ELECTRIC DRIVE ASSEMBLY BASED ON ACTUAL LOAD SPECTRUM (MT)
- Journal of Mechanical Strength Issue 1, Pages: 228-236(2023)
- 作者机构：
  
  1. 重庆理工大学汽车零部件先进制造技术教育部重点实验室
  2. 重庆长安汽车股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2023.01.028
  CLC：
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ZOU XiHong, GOU LinLin, XIONG Feng, et al. FATIGUE LIFE ANALYSIS OF DIFFERENTIAL CASE OF ELECTRIC DRIVE ASSEMBLY BASED ON ACTUAL LOAD SPECTRUM (MT). [J]. Journal of Mechanical Strength (1):228-236(2023)
DOI：

ZOU XiHong, GOU LinLin, XIONG Feng, et al. FATIGUE LIFE ANALYSIS OF DIFFERENTIAL CASE OF ELECTRIC DRIVE ASSEMBLY BASED ON ACTUAL LOAD SPECTRUM (MT). [J]. Journal of Mechanical Strength (1):228-236(2023) DOI： 10.16579/j.issn.1001.9669.2023.01.028.

摘要

提出了基于实测载荷谱的电驱动总成差速器壳体疲劳寿命分析方法。以某电动汽车电驱动总成差速器壳体为研究对象，建立了壳体有限元模型，进行了模态仿真分析，并进行了试验验证。在此基础上，以差速器壳体实测载荷谱作为载荷输入，以实车行驶工况为边界约束条件，对差速器壳体进行了动力学仿真分析。综合电驱动总成差速器壳体动力学有限元分析结果、名义应力法及壳体修正S-N曲线，对电驱动总成差速器壳体疲劳寿命进行了分析和研究。结果表明，差速器壳体疲劳失效位置与实际行驶时疲劳失效位置一致，基于实际行驶载荷谱能够准确分析差速器壳体实际行驶疲劳寿命情况。

Abstract

A method for the fatigue life analysis of the differential housing of the electric drive assembly based on the measured load spectrum is proposed. Taking the housing of an electric drive assembly differential of an electric vehicle as the research object, a finite element model of the housing is established, modal analysis is carried out, and modal test verification is carried out. On this basis, with the measured load spectrum of the differential housing as the load input, and the actual vehicle driving conditions as the boundary constraints, the dynamics simulation analysis of the differential housing is carried out. Based on the dynamic finite element analysis results of the differential housing of the electric drive assembly, the nominal stress method and the modified S-N curve of the housing, the fatigue life of the differential housing of the electric drive assembly is analyzed and researched. The results show that the fatigue failure position of the differential housing is consistent with the fatigue failure position during actual driving. Based on the actual driving load spectrum, the actual driving fatigue life of the differential housing can be accurately analyzed.

关键词

电驱动总成差速器壳体模态试验实测载荷谱动力学分析疲劳寿命

Keywords

Differential housing of electric drive assemblyModal testMeasured load spectrumDynamic analysisFatigue life

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