Abstract
Based on wave theory, blocking mass impeding propagation of flexural waves was analyzed with force excitation applied on a ship pedestal. The analysis model of a complex structure was developed by combining statistical energy analysis and the finite element method. Based on the hybrid FE-SEA method, the vibro-acoustic response of a complex structure was solved. Then, the sound radiation of a cylindrical shell model influenced by blocking mass was calculated in mid/high frequency. The result shows that blocking mass has an obvious effect on impeding propagation. The study provides a theoretical and experimental basis for application of the blocking mass to structure-borne sound propagation control.
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Foundation item: Supported by the Shipbuilding Industry of National Defense Science and Technology Research Projects in Advance (1530****0031).
Xianzhong Wang was born in 1986. He is a PhD candidate at the College of Shipbuilding Engineering, Harbin Engineering University, majoring in the vibro-acoustic response of structure.
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, and hydrodynamics.
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Wang, X., Yao, X., Wang, Q. et al. Numerical analysis of a blocking mass attenuating wave propagation. J. Marine. Sci. Appl. 10, 490–494 (2011). https://doi.org/10.1007/s11804-011-1096-8
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DOI: https://doi.org/10.1007/s11804-011-1096-8