, Volume 10, Issue 1, pp 25-32
Date: 02 Apr 2011

The influence of blocking mass parameters on the vibration isolation performance of a power cabin

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Abstract

Rigid blocking masses are located in the typical base structure of a power cabin based on the impedance mismatch principle. By combining the acoustic-structural coupling method and statistical energy analysis, the full-band vibration and sound radiation reduction effect of vibration isolation masses located in a base structure was researched. The influence of the blocking mass’ cross-section size and shape parameters and the layout location of the base isolation performance was discussed. Furthermore, the effectiveness of rigid vibration isolation design of the base structure was validated. The results show that the medium and high frequency vibration and sound radiation of a power cabin are effectively reduced by a blocking mass. Concerning weight increment and section requirement, suitably increasing the blocking mass size and section height and reducing section width can result in an efficiency-cost ratio.

Foundation item: Supported by the International Cooperation Program under Grant No.2007DFR80340 and the National Natural Science Foundation of China under Grant No.50779007.
Fang Ji was born in 1984. Now he is a postgraduate student at the Shipbuilding Engineering College of Harbin Engineering University. His research interest includes structural vibration and sound radiation.
Xiongliang Yao was born in 1963. Now he is a professor at the Shipbuilding Department, Harbin Engineering University, China. His research interest includes shipbuilding, vibration control, flow induced vibration, structural analysis of ships and many others. He has won many awards at national level.
Xi Ye was born in 1987. Now he is a postgraduate student at the Shipbuilding Engineering College of Harbin Engineering University. His research interest includes structural vibration and sound radiation.