Dynamic characteristics of vibration response transmissibility and its application in operational modal analysis

被引：0

作者：

Li X. ^{[1
,2
]}

Dong X. ^{[2
]}

Yue X. ^{[1
]}

Huang W. ^{[1
]}

Peng Z. ^{[2
]}

机构：

[1] Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang

[2] State Key Lab of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 09期

关键词：

False mode; Operational modal analysis; Vibration transmissibility; Zeros and poles of system;

D O I：

10.13465/j.cnki.jvs.2019.09.009

中图分类号：

学科分类号：

摘要：

Vibration response transmissibility describes relations among responses of various DOFs in a multi-DOF system. It is widely applied in many fields and achieves remarkable application results, especially, in the field of operational modal analysis. But, there is a lack of complete and systematic analysis for dynamic characteristics of vibration response transmissibility. Here, starting from the fundamental definition of vibration response transmissibility, under different inputs, features of vibration response transmissibility at zeros and poles of a vibration system and its dependence upon the system input were deduced and analyzed analytically. Then, numerical examples were taken to simulate and verify vibration response transmissibility's these characteristics. Finally, the vibration response transmissibility was applied to identify operational modes of a beam structure under non-white noise excitations. The results showed that the operational modal analysis method based on the vibration response transmissibility can avoid influences of false modes on its recognition results. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：62 / 70

页数：8

共 17 条

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