车载耦合工况下波纹管加速寿命载荷谱编制  

Load spectrum compilation of accelerated life of bellows exposed to onboard coupled excitation

作　　者：孙伟 卢剑伟 过慧敏 SUN Wei;LU Jianwei;GUO Huimin(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,Anhui,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,安徽合肥230009

出　　处：《农业装备与车辆工程》2024年第3期40-44,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：以某商用车排气系统波纹管为研究对象,通过样车道路试验对其多维耦合随机载荷激励进行测试,并对其解耦算法进行了探讨。对波纹管结构多轴疲劳寿命进行预测,进而采用时域损伤保留法对波纹管加速寿命载荷谱编辑方法进行了探讨,将加速寿命载荷谱缩短至原始谱的17.86%,为波纹管加速寿命试验设计提供了依据。The bellows of a certain commercial vehicle exhaust system were employed as the research object.The multi-dimensional stochastic excitation of the bellows was sampled by vehicle road test,and its decoupling algorithm was discussed.The multi-axial fatigue life of the bellows was evaluated,and its accelerated life load spectrum compilation based on time domain damage retention method was investigated.The accelerated life load spectrum was reduced to 17.86%of the original spectrum,which provides the basis for design of accelerated life test of the bellows.

关 键 词：波纹管 多轴疲劳 解耦 加速寿命 载荷谱编制 

分 类 号：U467[机械工程—车辆工程]