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Study on the Impediment to vibration Wave Propagation from rigid vibration isolation mass

Journal of Marine Science and Application 2011年第1期10卷 63-69页

作者：王强勇卢友敏王献忠姚熊亮 Wuhan Second Ship Design and Research Institute College of Shipbuilding Engineering Harbin Engineering University

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 *** 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 *** 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 *** 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.

关键词： rigid vibration isolation mass principle of impedance mismatching vibration wave propagationcharacteristics vibration isolation and noise reduction

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Optimization Design of vibration Characteristics of Ship Composite Brace with rigid vibration isolation mass

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Journal of Marine Science and Application 2011年第2期10卷 215-219页

作者：王强勇姚熊亮于丹竹庞福振 Wuhan Second Ship Design and Research Institute College of Shipbuilding Engineering Harbin Engineering University

In considering the theory of structural dynamic optimization design, a design method of the structural style of ship composite brace with rigid vibration isolation mass was studied. Two kinds of structural dynamic optimization formulations minimizing the vibration acceleration of the non-pressure hull on the restraining condition of the gross weight of the ship cabin were established: 1) dynamic optimization of the sectional dimensions of the rigid vibration isolation mass in the composite brace; 2) dynamic optimization of the arranging position of the rigid vibration isolation mass. Through the optimization results, sectional dimensions and the arranging position of the rigid vibration isolation mass with better performance in reducing vibration were gained, and some reference was provided for practical engineering designs as well as enrichment of the design method of a novel ship vibration-isolation brace.

关键词： rigid vibration isolation mass composite brace impedance mismatch optimization design vibration and noise reduction

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