机械科学与技术2017，Vol.36Issue(12)：1838-1842,5.DOI:10.13433/j.cnki.1003-8728.2017.1207
点焊结构在随机振动环境下的疲劳寿命研究
Studying Fatigue Life of Spot Welded Structure Under Random Vibration Environment
黄军 1王瑞杰 1毛志亮1
作者信息
- 1. 昆明理工大学机电工程学院,昆明650093
- 折叠
摘要
Abstract
Based on the Dirlik method for vibration fatigue life study in the frequency domain,the finite element model is established and modified according to the model test,and the finite element method is used to predict the fatigue life of the spot welded structure.The effects of different PSD spectral types on the fatigue life under the random vibration environment are analyzed.The analysis results show that with increasing PSD amplitude under the same vibration level in the first natural frequency domain,the fatigue life under random vibration decreases.Under the influence of white noise acceleration power spectrum and when the PSD amplitude was kept unchanged;with increasing bandwidth,the fatigue life under the random vibration environment decreases.The influence of random vibration on the fatigue life in the region of non-resonance frequency between the first and second modal frequencies should not be neglected.关键词
Dirlik方法/点焊/有限元法/随机振动疲劳寿命/PSD谱型Key words
dirlik method/spot welded structure/finite element method/random vibration/fatigue life/PSD spectral type分类
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黄军,王瑞杰,毛志亮..点焊结构在随机振动环境下的疲劳寿命研究[J].机械科学与技术,2017,36(12):1838-1842,5.
