基于声固耦合法的双体船水下近场噪声特性研究

摘要

Based on acoustic-structure coupling method, underwater noise radiation prediction models of a twin-sphere structure and a twin-hull craft are established respectively. The underwater noise characteristics in the near fields of the two structures under single-side or double-side excitations are analyzed. Study shows that the behavior of underwater noise radiation of the twin-sphere structure and the twin-hull craft is quite different from the single hull ship. Due to the existence of twin hulls of the craft, the underwater sound radiation varies greatly especially in the near field. The sound changes severely when standing wave appears in the region between the twin hulls if the distance of bilateral hulls and sound wave length satisfies certain conditions at certain frequencies This phenomenon will cause the noise bright point and a remarkable difference of characteristics of underwater noise in near field between a catamaran and a single-hull craft.%基于声固耦合法,建立双球壳结构及双体船结构水下噪声数值预报模型,对双球壳结构及双体船结构在单侧及双侧潜体受激下的水下近场噪声特性进行分析.研究表明,潜体结构会对双体船水下近场噪声特性产生较大影响,在特定的潜体间距、声波频率之下,潜体之间区域会出现噪声亮点,从而使双体船水下近场噪声特性异于单体船舶.