Numerical simulation of vibration control of a submerged stiffened cylindrical structure with active vibration isolators is presented. Vibration transmission from vibrating machinery to the cylindrical structure through the active vibration isolators is analyzed by a numerical model synthesized from frequency response functions (FRFs) and impedances. The coupled finite element/boundary element (FE/BE) method is employed to study the vibro-acoustic behavior of the fluid-loaded cylindrical structure. Sound pressure in the far-field is calculated in terms of the pressure and normal acceleration of the outer surface of the cylindrical shell. An adaptive multichannel control based on the filtered-x least mean squares (FxLMS) algorithm is used in the active vibration isolation. Simulation results have demonstrated that suppression of vibration of the four elastic foundations attached to the cylindrical shell will reduce the spatial-average mean-square velocity and the instantaneous radiated power of the cylindrical shell. As a result, suppression of vibration of the foundations leads to attenuation of sound radiation in the far-field induced by the radial displacement dominant mode of the shell. Moreover, vibration suppression is greatly influenced by the strong couplings among control channels. According to these results, it can be concluded that the proposed method is effective in the analysis of underwater sound radiation control of cylindrical structures.
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e-mail: xchhuang@sjtu.edu.cn
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February 2012
Research Papers
Multi-channel Active Vibration Isolation for the Control of Underwater Sound Radiation From A Stiffened Cylindrical Structure: A Numerical Study
Huang Xiuchang,
Huang Xiuchang
State Key Laboratory of Mechanical System and Vibration,
e-mail: xchhuang@sjtu.edu.cn
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Zhang Zhiyi,
Zhang Zhiyi
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Zhang Zhenhua,
Zhang Zhenhua
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Hua Hongxing
Hua Hongxing
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
Search for other works by this author on:
Huang Xiuchang
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
e-mail: xchhuang@sjtu.edu.cn
Zhang Zhiyi
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
Zhang Zhenhua
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
Hua Hongxing
State Key Laboratory of Mechanical System and Vibration,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
J. Vib. Acoust. Feb 2012, 134(1): 011012 (12 pages)
Published Online: December 28, 2011
Article history
Received:
July 9, 2010
Revised:
May 24, 2011
Accepted:
June 1, 2011
Online:
December 28, 2011
Published:
December 28, 2011
Citation
Xiuchang, H., Zhiyi, Z., Zhenhua, Z., and Hongxing, H. (December 28, 2011). "Multi-channel Active Vibration Isolation for the Control of Underwater Sound Radiation From A Stiffened Cylindrical Structure: A Numerical Study." ASME. J. Vib. Acoust. February 2012; 134(1): 011012. https://doi.org/10.1115/1.4004684
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