流体机械2024，Vol.52Issue(6)：99-104,6.DOI:10.3969/j.issn.1005-0329.2024.06.013
裂纹对叶片固有频率影响的研究分析
Analysis of the effect of crack on the inherent frequency of blades
弓锋利 1尚飞虎 1韩卫 1张俊悦 1解江涛 1孙垚垚1
作者信息
- 1. 西安陕鼓动力股份有限公司,西安 710611
- 折叠
摘要
Abstract
In order to study the effect of cracks on blade natural frequency,a finite element geometric model of blade was established,and the effects of crack location and crack depth on blade natural frequency were analyzed.The results show that:when the crack is in different positions of the blade,the decrease rate of natural frequency of the blade is 4.06%(transition arc)>1.08%(middle blade)>0.04%(near the tip of the blade).When the crack is in different depths,the decrease rate of blade natural frequency is 13.25%(40 mm)>8.12%(30 mm)>4.06%(20 mm)>1.35%(10 mm).In order to verify the validity of the simulation results,the experimental analysis was carried out,and the experimental results were basically consistent with the simulation results:the influence of cracks on the natural frequency at different positions of the blade was as follows:the transition arc>the middle of the blade shape>near the tip of the blade,and the natural frequency at the transition arc of the blade decreased with the increase of the crack depth.The research results can provide some reference for the prediction and detection of early cracks in blades.关键词
叶片/固有频率/裂纹/位置/深度Key words
blade/inherent frequency/crack/location/depth分类
机械制造引用本文复制引用
弓锋利,尚飞虎,韩卫,张俊悦,解江涛,孙垚垚..裂纹对叶片固有频率影响的研究分析[J].流体机械,2024,52(6):99-104,6.
