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清华大学学报(自然科学版)  2018, Vol. 58 Issue (2): 212-216    DOI: 10.16511/j.cnki.qhdxxb.2018.26.004
  汽车工程 本期目录 | 过刊浏览 | 高级检索 |
微型客车后驱动桥多轴耦合疲劳试验仿真
董智超1, 王霄锋1, 楼位鹏1, 黄元毅2, 钟明2
1. 清华大学 汽车工程系, 北京 100084;
2. 上汽通用五菱汽车股份有限公司, 柳州 545007
Simulation of a multi-axial loading fatigue test of the rear drive axle of a minivan
DONG Zhichao1, WANG Xiaofeng1, LOU Weipeng1, HUANG Yuanyi2, ZHONG Ming2
1. Department of Automotive Engineering, Tsinghua University, Beijing 100084, China;
2. SAIC GM Wuling Automobile Co., Ltd., Liuzhou 545007, China
全文: PDF(2083 KB)  
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摘要 汽车行驶时悬架系统承受着来自路面的载荷冲击,保证其耐久性是汽车设计中非常重要且急需解决的关键问题之一,多轴向加载的室内道路模拟疲劳试验被广泛采用。为了进一步缩短汽车研发周期,降低研发成本以提高市场竞争力,该文建立了后驱动桥的动态有限元模型,依照实验室道路模拟疲劳试验的基本原理,通过编制MATLAB程序实现了系统频响函数识别、根据目标信号和频响函数反求动态载荷、计算动态响应与目标信号的误差等功能。仿真结果表明:后驱动桥目标信号测点的应力应变时间历程复现综合误差均在5%以内,并预测出该悬架系统的疲劳强度危险点位于截面尺寸突变的区域。
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董智超
王霄锋
楼位鹏
黄元毅
钟明
关键词 有限元多轴向加载道路模拟系统识别应力应变时间历程疲劳强度危险区域    
Abstract:When a vehicle is running, its suspension is heavily loaded due to the motion. The durability is then one of the key problems in vehicle design. Multi-axial loading laboratory fatigue tests are widely used to shorten the development process, reduce costs and enhance market competitiveness. This paper presents a practical method for simulating multi-axial fatigue tests of a rear axle using a dynamic finite element model of the rear axle and data processing in MATLAB. The simulation of the laboratory fatigue tests includes system identification, calculation of the input dynamic loads for the finite-element model and calculation of the stress-strain response reproduced and compared with the measured stress-strain response. With the errors of less than 5% with the critical fatigue areas in the rear axle located where the section sizes change.
Key wordsfinite element    multi-axial loading    road simulation    system identification    stress-strain response    critical fatigue areas
收稿日期: 2017-06-02      出版日期: 2018-02-15
ZTFLH:  O242.21  
通讯作者: 王霄锋,副教授,E-mail:wangxf60@tsinghua.edu.cn     E-mail: wangxf60@tsinghua.edu.cn
引用本文:   
董智超, 王霄锋, 楼位鹏, 黄元毅, 钟明. 微型客车后驱动桥多轴耦合疲劳试验仿真[J]. 清华大学学报(自然科学版), 2018, 58(2): 212-216.
DONG Zhichao, WANG Xiaofeng, LOU Weipeng, HUANG Yuanyi, ZHONG Ming. Simulation of a multi-axial loading fatigue test of the rear drive axle of a minivan. Journal of Tsinghua University(Science and Technology), 2018, 58(2): 212-216.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2018.26.004  或          http://jst.tsinghuajournals.com/CN/Y2018/V58/I2/212
  图1 后驱动桥的有限元模型
  表1 后驱动桥有限元模型参数