基于相对疲劳损伤谱的整车疲劳耐久试验加速方法研究

摘要

The authors propose a durability test acceleration method based on relative fatigue damage spectrum (RDS). Taking a vehicle as the research object, they acquire the spindle acceleration signal and shock-absorber displacement signal. They take the RDS of structural durability test procedures as a target to optimize the test proce-dure through optimizing algorithm. And under the premise of guaranteeing the RDS consistent, they try to shorten the test cycle as possible.%提出一种基于相对疲劳损伤谱的疲劳耐久试验加速方法。以某轿车为研究对象，在试验场采集轴头加速度信号和减振器位移信号，以结构耐久性试验程序的相对疲劳损伤谱为目标，通过优化算法对试验程序进行优化，在保证相对疲劳损伤谱一致前提下，最大限度地缩短试验周期。