应用于几何失谐叶盘振动分析的考虑预应力的模态综合法（英文）  

Application of Mode Synthesis Method for Vibration Analysis of Geometrically Mistuned Bladed Disk Considering the Prestress

作　　者：李若愚 刘佳雯 姚建尧 Ruo-yu Li;Jia-wen Liu;Jian-yao Yao

机构地区：[1]College of Aerospace Engineering, Chongqing University

出　　处：《风机技术》2019年第5期72-78,共7页Chinese Journal of Turbomachinery

基　　金：The National Natural Science Foundation of China(No.11502037);the Chongqing Research Program of Basic Research and Frontier Technology(No.cstc2018jcyj A3066);the Fundamental Research Funds for the Central Universities(No.2018CDGFHK0019)

摘　　要：The importance of mistuning analysis lies on understanding the vibration characteristics of the bladed disk.Previous works generally ignored the nonlinear effect of prestress,which increase the gap between the actual results and research results.In this paper,a unique way to address the reduced-order model is presented,where disk and each blade component is attached as individual substructures with free-interface component mode synthesis considering prestress.The influence of nonlinear inertial effect on mistuning characteristics of rotors is compared with linear inertial effect.Results show that ignoring nonlinearity of the rotational speed,the influence of speed on mode localization may be different from the true situation.The importance of mistuning analysis lies on understanding the vibration characteristics of the bladed disk. Previous works generally ignored the nonlinear effect of prestress, which increase the gap between the actual results and research results. In this paper, a unique way to address the reduced-order model is presented, where disk and each blade component is attached as individual substructures with free-interface component mode synthesis considering prestress. The influence of nonlinear inertial effect on mistuning characteristics of rotors is compared with linear inertial effect. Results show that ignoring nonlinearity of the rotational speed, the influence of speed on mode localization may be different from the true situation.

关 键 词：Mistuned Bladed DISK Pressed Component MODE Synthesis Free-interface MODE LOCALIZATION Nonlinear INERTIAL Effect 

分 类 号：R33[医药卫生—人体生理学]