摘要
目的将多轴耐久转化为单轴耐久分析产品耐久性,大幅度降低开发成本和周期。方法采用时域信号转化疲劳损伤谱,进一步转化功率谱密度,通过最大冲击响应谱控制路谱频域下极大值的方法生成台架试验条件。由于文中结合排气管开发进行认证,因此加入旋转构件造成的激励振源和阶次分析方法,并且形成了发动机激励和路面激励合成的台架试验谱。结果该排气管振动耐久试验结果合格,市场及试验场并无开裂现象。结论实现了加速试验效果,缩短了试验周期,降低了验证成本。
The work aims to transform the multiaxial durability into uniaxial durability and analyze the product durability to greatly reduce the development cost and cycle.The fatigue damage spectrum was transformed by the time domain signal and then the power spectrum density was further transformed.The bench test conditions were generated by controlling the maximum value of the road spectrum in frequency domain by the maximum shock response spectrum.In view of the development and certification of exhaust pipe,the analysis method for excitation source and order caused by rotating components was added,and the bench test spectrum of engine excitation and road excitation was formed.The vibration durability test results of the exhaust pipe were qualified,and there was no crack in the market and test site.The accelerated test effect is realized,the test cycle is shortened and the verification cost is reduced.
作者
段凯欣
胡玉倩
刘瑜瑾
张凯
DUAN Kai-xin;HU Yu-qian;LIU Yu-jin;ZHANG Kai(Beijing Foton Daimler Automobile Co.,Ltd,Beijing 101400,China)
出处
《装备环境工程》
CAS
2020年第10期88-93,共6页
Equipment Environmental Engineering
基金
福田戴姆勒技项目管理计字[2018]第184号。
关键词
道路模拟试验
疲劳耐久
雨流计数
杜哈梅积分
疲劳损伤谱
冲击响应谱
危险截面
Colormap
road simulation test
fatigue and durability
rain-flow counting
Duhamel’s integral
fatigue damage spectrum(FDS)
shock response spectrum(SRS)
critical plane
Colormap
