电动商用车车架疲劳寿命模拟与优化

王源绍; 严斯; 张继元; 迟英姿; 乔克婷

doi:10.13433/j.cnki.1003-8728.20220031

电动商用车车架疲劳寿命模拟与优化

doi: 10.13433/j.cnki.1003-8728.20220031

王源绍^{1, 2,},
严斯¹,
张继元¹,
迟英姿¹,
乔克婷¹

1.
南京工业大学浦江学院汽车工程学院，南京　211134
2.
南京工业大学机械与动力工程学院，南京　211816

基金项目: 江苏省高等学校自然科学研究面上项目（19KJD580004）

详细信息

作者简介:
王源绍（1987−），讲师，博士研究生，研究方向为汽车NVH、车身轻量化，wangshuibai@126.com

中图分类号: TH-3
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- 文章访问数: 136
- HTML全文浏览量: 66
- PDF下载量: 34
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-25
- 网络出版日期: 2023-05-29
- 刊出日期: 2023-05-25

Simulation and Optimization of Fatigue Life for Electric Commercial Vehicle Frame

1.
Automotive Engineering College, Nanjing Tech University Pujiang Institute, Nanjing 211134, China
2.
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China

摘要

摘要: 为精确预测电动商用车车架疲劳寿命，通过建立车架有限元模型并进行强度仿真，确定疲劳失效危险位置。采集危险位置载荷谱，分析疲劳损伤值，采用Miner疲劳损伤理论和雨流计数法将应力谱时域信号转化成雨流矩阵，最终建立车架台架实验与道路试验疲劳寿命间的当量折算关系。设计实验方法并制作实验台架，对比道路试验与台架实验结果，验证了所建立当量折算关系的准确性。表明所建立的实验方法可提高车架疲劳寿命预测精度与可靠性，缩短道路疲劳试验周期。
- 车架 /
- 仿真 /
- 台架实验 /
- 方法验证 /
- 疲劳预测
Abstract: In order to accurately predict the fatigue life of the electric commercial vehicle frame, the finite element model for frame was established and the strength simulation was carried out to determine the dangerous position of fatigue failure. Collecting the load spectrum of the fatigue risk position of the frame, and analyzing the fatigue damage value. The time domain signal of stress spectrum was transformed into rain flow matrix by rain flow counting method and Miner theory. The equivalent conversion relationship between the bench test and the road test of the fatigue life of the frame was established. Designing the experimental bench and method, the comparison between the road fatigue test and the bench fatigue test results shows that the equivalent conversion relation is valid, and the test method can improve the accuracy and reliability of the fatigue life prediction of the frame, shorten the time of the road fatigue test.
- frame /
- simulation /
- bench test /
- methods validation /
- fatigue prediction

HTML全文

图 1 车架有限元模型

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图 2 仿真结果

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图 3 雨流计数法

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图 4 车架前测量点加速度谱案

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图 5 车架后测量点加速度谱案

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图 6 车架扭转角-时间曲线

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图 7 车架应变信号采集点

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图 8 采集点应力谱

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图 9 台架疲劳实验

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图 10 车架纵梁台架实验结果

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图 11 车架纵梁道路试验结果

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表 1 车架左侧纵梁损伤结果

编号实验工况单次损伤

1 −1°～1° 1.17×10⁻⁶
2 −2°～2° 1.89×10⁻⁶
3 −3°～3° 3.86×10⁻⁶
4 −4°～4° 9.77×10⁻⁶

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