基于模态叠加法的车体疲劳寿命分析

doi:10.16731/j.cnki.1671-3133.2017.10.009

现代制造工程 ›› 2017, Vol. 445 ›› Issue (10): 47-53.doi: 10.16731/j.cnki.1671-3133.2017.10.009

基于模态叠加法的车体疲劳寿命分析

朱海燕^1,2, 邬平波¹, 池茂儒¹, 吴兴文¹, 卢耀辉³

1 西南交通大学牵引动力国家重点实验室,成都 610031;
2 华东交通大学机电与车辆工程学院,南昌 330013;
3 西南交通大学机械工程学院,成都 610031

收稿日期:2015-08-25 出版日期:2017-10-20 发布日期:2018-01-08
作者简介:朱海燕,副教授,博士,研究方向为车辆系统动力学与强度。 E-mail:zhupetrelcao@163.com
基金资助:
国家自然科学基金项目(51665015);国家重点研发计划资助项目(2016YFB1200500);西南交通大学牵引动力国家重点实验室开放基金项目(TPL1611)

Fatigue strength analysis of carbody based on the mode

Zhu Haiyan^1,2, Wu Pingbo¹, Chi Maoru¹, Wu Xingwen¹, Lu Yaohui³

1 Traction Power State Key Laboratory,Southwest JiaoTong University,Chengdu 610031,China;
2 School of Mechanotronics & Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China;
3 College of Mechanic Engineering,Southwest JiaoTong University,Chengdu 610031,China

Received:2015-08-25 Online:2017-10-20 Published:2018-01-08

摘要/Abstract

摘要： 基于模态应力恢复法,以模态叠加法获得的车体各模态位移响应为输入,得到车体有限元各节点模态应力载荷历程;使用Miner线性累积疲劳损伤理论对车体进行疲劳损伤评估。通过对不同模态的叠加得到对车体疲劳寿命影响较大的模态,结果表明:车体疲劳寿命主要受车体前10阶低频模态影响较大,高频模态对车体疲劳寿命影响较小。单独分析各阶模态对车体疲劳寿命影响,车体第1阶垂弯模态对车体各部位疲劳寿命具有较深的影响。

关键词: 刚柔耦合动力学, 模态叠加法, 模态应力恢复法, 车体疲劳

Abstract: Based on the modal displacement response the time history of modal stress of car body is determined by the method of modal stress recovery theory.Then the fatigue life of carbody is evaluated by the Miner accumulated fatigue damage theory.According to the analysis of influence of mode of vehicle on the fatigue life,the first ten modes of carbody with low frequency has the great influence on the fatigue life of car body,but the modes with high frequency has little effect on the fatigue life.Meanwhile by the analysis of influence of single mode on the fatigue life of the various parts of carbody,the first order vertical bending mode of carbody has the bigger impact on the fatigue life of carbody.

Key words: rigid-flexible coupling dynamic, modal superposition method, modal stress recovery method, carbody fatigue

中图分类号:

U270.1

朱海燕, 邬平波, 池茂儒, 吴兴文, 卢耀辉. 基于模态叠加法的车体疲劳寿命分析[J]. 现代制造工程, 2017, 445(10): 47-53.

Zhu Haiyan, Wu Pingbo, Chi Maoru, Wu Xingwen, Lu Yaohui. Fatigue strength analysis of carbody based on the mode[J]. Modern Manufacturing Engineering, 2017, 445(10): 47-53.

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基于模态叠加法的车体疲劳寿命分析

Fatigue strength analysis of carbody based on the mode

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