中文摘要：

论文较为详细地研究了双体船结构水下中低频辐射噪声特性。基于声固耦合法,建立了双体船水下中低频声辐射数值预报模型,分析了单侧片体激励、双侧片体激励等典型激励下的双体船结构水下中低频辐射声场分布,讨论了双体船水下辐射噪声的计算方法。研究表明,双体船水下声辐射与单体船相比存在一定差异,片体结构会对双体船结构水下声辐射产生影响,使其辐射声场发生改变,特别是对其近场声辐射而言,当片体间距与声波波长满足一定关系时,片体之间区域会产生驻波效应,从而使双体船水下声辐射分布发生改变;而当片体间区域不产生驻波效应时,双体船水下辐射噪声大致满足线性叠加原理。

英文摘要：

This paper examines the characteristics of low and middle frequency underwater noise from a catamaran. Based on acoustic-structure coupling method, a noise radiation prediction model for a twin-hull craft is established. Underwater noise excited by mono-hull and double-hull is studied respectively. It is shown that the behavior of underwater noise radiation from a catamaran is quite different from a single hull ship. The sound directivity changes severely when standing wave appears in the region between twin hulls. However, if the standing wave effects do not occur between twin hulls, the principle of linear superposition is approximately satisfied.