周期性阻振质量船体板振动带隙特性研究

Vibration band gap characteristics of ship plates with periodic vibration blocking masses

基于固体晶格能带理论,研究了周期性阻振质量船体板结构中振动波传播特性.采用有限元法结合布洛赫周期性边界条件,计算了周期性阻振质量船体板原胞模型的频散关系、本征位移场以及有限周期阻振质量船体板结构的频率响应函数.研究结果表明,周期性阻振质量船体板结构中存在振动带隙,阻振质量对船体板结构振动波衰减和阻隔特性主要是由振动带隙引起.

In this paper, the propagation and attenuation characteristics of vibration waves inship plates with periodic vibration blocking massesaretheoreticallyinvestigated.The dispersion relations, the power transmission spectra, and the displacement fields of the eigenmodes are calculated by using the finite element method combination with theBlochtheorem. Results show that the proposed ship plates with periodic vibration blocking masses can yield vibration band gaps. The vibration isolation mechanism ofvibration blocking masses is mainly attributed to vibration band gaps.