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。
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.
作者
王源绍
严斯
张继元
迟英姿
乔克婷
WANG Yuanshao;YAN Si;ZHANG Jiyuan;CHI Yingzi;QIAO Keting(Automotive Engineering College,Nanjing Tech University Pujiang Institute,Nanjing 211134,China;School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《机械科学与技术》
CSCD
北大核心
2023年第5期673-678,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
江苏省高等学校自然科学研究面上项目(19KJD580004)。
关键词
车架
仿真
台架实验
方法验证
疲劳预测
frame
simulation
bench test
methods validation
fatigue prediction
