Based on ANSYS software,a finite element model of blisks with breathing cracks is created,and the breathing effect of cracks is simulated by creating contact pairs at the cracks.Then,the model analysis is carried out on the blisk and the blisk with breathing cracks,the natural frequencies and mode shapes are obtained,the va-lidity of the finite element model is verified by model tests on the intact blisk.Finally,the effects of cracks of dif-ferent lengths and positions on the static frequency,dynamic frequency,frequency steering and vibration mode transformation of the blisk are compared and analyzed,so as to provide a reference for avoiding resonance and mo-nitoring the crack failure of the blisk.
关键词
整体叶盘/呼吸裂纹/有限元分析/固有特性
Key words
blisk/breathing crack/finite element analysis/natural characteristics
维普
万方数据