, Volume 10, Issue 1, pp 63-69
Date: 02 Apr 2011

Study on the impediment to vibration wave propagation from rigid vibration isolation mass

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Abstract

Based on the principle of impedance mismatching, the performance of rigid vibration isolation mass in impeding vibration wave propagation was discussed from the perspective of wave approach. Based on FEM, the influence of its weight as well as the cross-section shape parameters on the isolation performance of rigid vibration isolation mass was studied through numerical simulation. The results show that rigid vibration isolation mass can effectively impede the propagation of the medium and high frequency vibration waves, and the heavier the vibration isolation mass, the better the isolation performance. For low frequency waves, the vibration isolation effect is not so obvious; for a rectangular vibration isolation mass, the isolation performance could be effectively improved by increasing the cross-section height and reducing the cross-section width. A useful reference was provided for the application of rigid vibration isolation masses to the vibration isolation and noise reduction of ship structure.

Foundation item: Supported by the Shipbuilding Industry of National Defense Science and Technology Research Projects in Advance under Grant No.153010110031.
Qiangyong Wang was born in 1986. He is a master graduate student at College of Shipbuilding Engineering, Harbin Engineering University, majoring in ship vibration and noise control.
Xiongliang Yao was born in 1963. He is a professor at Harbin Engineering University. He received his PhD degree from Harbin Engineering University in 1992. His current research interests include structural dynamics, vibration and noise control, hydrodynamics, etc.