级间接触耦合的失谐叶盘模态局部化问题研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (9) : 46-49.

论文

级间接触耦合的失谐叶盘模态局部化问题研究

王艾伦1,2; 陈金波1,2

作者信息 +

Mode localization analysis of mistuned bladed disk coupled by interstage contact

Wang Ai-lun1,2; Chen Jin-bo1,2

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文章历史 +

摘要

基于有限元实体建模方法，建立了燃气轮机拉杆转子中两级叶盘系统有限元模型，分析比较了有无级间接触耦合作用下叶盘系统的模态特性，重点研究了轮盘级间接触耦合效应对叶盘系统频率转向特性的影响。研究表明，级间接触耦合作用下出现了叶盘耦合振动的复杂振动形式，振动能量不再局限于单级叶盘；级间耦合作用导致叶盘系统的频率转向特性发生改变，频率转向区内的模态不再高度密集，降低了叶盘系统对失谐的敏感度。建立了叶片刚度失谐的两级叶盘系统有限元模型并进行模态分析，结果显示失谐叶盘系统模态局部化程度较低。

Abstract

The finite element model of two-stage bladed disks in gas turbine rotor was established. The modal characteristics of multistage and single bladed disk were compared. The effect of interstage contact coupling on frequency veering characteristic of bladed disk was focused on. The results show that new modes of stage-coupled vibration appear due to interstage contact coupling. The frequency veering characteristic is modified that modes near frequency veering region are less dense, such modification leads to a low sensitivity to mistuning for bladed disk. The modal characteristic of mistuned two-stage bladed disks was analyzed. It is verified that mode localization degree of mistuned bladed disk is reduced greatly.

导出引用

王艾伦;陈金波;. 级间接触耦合的失谐叶盘模态局部化问题研究[J]. 振动与冲击, 2011, 30(9): 46-49

Wang Ai-lun;Chen Jin-bo;. Mode localization analysis of mistuned bladed disk coupled by interstage contact[J]. Journal of Vibration and Shock, 2011, 30(9): 46-49