裂纹叶片分布对失谐叶盘结构振动特性的影响  

Effect of cracked blade distribution on vibration characteristics of a mistuned bladed disk

作　　者：王艾伦[1,2] 黄飞[1,2] 

机构地区：[1]中南大学现代复杂装备设计与极端制造教育部重点实验室,长沙410083 [2]中南大学机电工程学院,长沙410083

出　　处：《振动与冲击》2011年第4期26-28,94,共4页Journal of Vibration and Shock

基　　金：国家重点基础研究发展计划(973计划)分课题(2007CB707706)

摘　　要：基于有限元实体建模方法,建立了含穿透型裂纹的失谐叶盘结构有限元模型,揭示了两个裂纹叶片的分布情况对失谐叶盘结构振动特性的影响规律。研究表明,两个裂纹叶片的分布情况对失谐叶盘结构的基频以及模态局部化程度均有较大影响,并发现当两个裂纹叶片处于相邻位置时,失谐叶盘结构的基频最小,模态局部化程度最高,且该现象在弱耦合条件下尤为突出。而离心力(转速)对含两个裂纹叶片的失谐叶盘结构振动局部化有减弱作用。Based on the finite element modeling method,a finite element model of a mistuned bladed disk with through cracks was established.The distribution effect of two cracked blades on vibration characteristics of the mistuned bladed disk was revealed.Research results showed that the distribution of two cracked blades can greatly influence the fundamental frequency of the mistuned bladed disk and the level of modal localization;when two cracked blades locate in the adjacent positions,the fundamental frequency of the mistuned bladed disk is the minimum,and the level of modal localization is the highest;moreover,the phenomenon is particularly prominent under weak-coupling condition;but the centrifugal force due to rotational speed can weaken the vibration localization of the mistuned bladed disk with two cracked blades.

关 键 词：失谐叶盘结构 基频 裂纹叶片 振动局部化 

分 类 号：TH113.1[机械工程—机械设计及理论]