Journal
JOURNAL OF VIBRATION AND CONTROL
Volume 28, Issue 23-24, Pages 3859-3874Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/10775463211039903
Keywords
Vibration source identification; force localization; energy density; vibration energy
Categories
Funding
- Hong Kong Polytechnic University
Ask authors/readers for more resources
In this research, it is proven that the high-order cross-modal energy densities of a linear dynamic structure are highly correlated to the location of the external exciting force. Based on this finding, a new force localization method is proposed and tested on vibrating beam structures. The proposed force localization method works well according to numerical tests and experiments.
The localization of shaking forces acting on an operating machine is an important step to identify vibration and noise sources. The forced vibration response of a linearly vibrating structure is assumed to be linear. However, the energy distribution of a linearly vibrating structure contains coupled terms in the modal decomposition of the vibration energy density function. These coupled energy terms represent the cross-modal energy density associated with the exciting force of a dynamic structure under forced vibration. In this research, it is proved analytically that the high-order cross-modal energy densities of a linear dynamic structure are highly correlated to the location of the external exciting force. Using this finding, a new force localization index based on the high-order cross-modal energy densities of a dynamic structure is proposed and tested. Numerical tests on uniform and step beam structures under force excitation with different frequencies and locations have been carried out to test the effectiveness of the proposed force localization method. It is found that the proposed force localization method works well on vibrating beam structures. Experiments are carried out to verify the proposed force localization method.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available