车辆开闭件疲劳性能分析与验证

doi:10.19562/j.chinasae.qcgc.2024.08.019

Abstract

Abstract:

A study is conducted on the fatigue failure problem caused by the opening and closing of a car door. Firstly， the transient impact load under the door closing condition is discretized， and the vibration acceleration response signal and frequency response function are collected through the whole vehicle and bench tests respectively. Thus， the transfer path analysis （TPA） method is used to calculate the discretized transient impact load. Secondly， the obtained transient impact load is input into the finite element model of the door， and then the stress-time history response cloud diagram under the door closing condition is obtained， and the fatigue life under the door opening and closing condition is further calculated based on the fatigue damage theory. Finally， the fatigue analysis results based on load identification， the fatigue analysis results based on explicit dynamics and the fatigue test results under the door closed condition are compared and verified with each other. The conclusion shows that the three results are consistent， which has verified the rationality of the method.

Key words: vehicle door, transient response, fatigue durability, finite element method

Zhe Liu,Hui Li,Dawei Gao,Yunkai Gao. Analysis and Verification of Fatigue Performance of Vehicle Closures[J].Automotive Engineering, 2024, 46(8): 1529-1536.

Figures/Tables 18

References 22

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材料	弹性模量/MPa	UTS/MPa
DC01	210 000	220
DC04	210 000	240
DC06	210 000	269
ST52	210 000	490
Q235	210 000	431

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Analysis and Verification of Fatigue Performance of Vehicle Closures

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