阻振质量块对板结构振动与声辐射的影响

本文借助通用软件Msc/Nastran，Sysnoise对阻振质量块-板结构的振动与声辐射进行近似计算，结构振动采用有限元近似；声场和结构表面采用Helmholtz方程的边界元近似，探讨了阻振质量块结构参数对振动和声辐射的影响规律，从而初步探讨了实现板结构良好隔振特性的途径，为舰船的减振降噪设计提供了参考。

Vibration-isolating Mass-block Effect and Acoustic Radiation of a Plate Structure

In the paper,using the universal software Msc/Nastran and Sysnoise,the vibration and the acoustic radiation of a plate containing a mass-block is approximatively calculated.With the vibration of the object simulated by FEM and the noise field and the surface of the object approximated by BEM of Helmholtz equation,the law that parameters of the mass-block affect the vibration and the acoustic radiation is discussed.Mecnwhile,the favourable way of vibration isolation is probed into,which can provide reference for reducing vibration and lessening noise of the marine ship.