摘要
介绍了几种常见的宽带随机振动疲劳寿命频域估算方法,包括P.H.Wirsching窄带假设法,Dirlik法,Bi-modal法和简化的Bi-modal法等。并专门设计若干组具有明显双模态响应的悬臂梁随机振动疲劳试验,通过采集到的应变数据获得应力数据,采用上面介绍的各种频域估算方法估算试件的振动疲劳寿命,并与试验寿命比较,以此验证各种频域估算方法的适用性和估算精度。
To estimate the fatigue life for a wideband random vibration fatigue problem, several frequency domain analysis methods are introduced and studied in this paper, which are presented by P. H. Wirsching, Dirlik, T.T. Fu and the authors. The vibration fatigue tests of several groups of cantilever beams with significant bimodal re sponse are proposed, then their fatigue lives are estimated with these frequencydomain analysis methods using test ed strain data, and the test life results and estimated life results are compared to verify the accuracy and application range of the mentioned frequencydomain analysis methods.
出处
《机械科学与技术》
CSCD
北大核心
2013年第6期839-844,共6页
Mechanical Science and Technology for Aerospace Engineering
关键词
宽带随机振动
疲劳寿命估算
频域分析
振动疲劳试验
wide-band random vibration
fatigue life estimation
frequency domain analysis
vibration fatigue test
