求解水中加肋板声辐射特性的虚拟声源法  

The virtual source method for computing the sound radiation power of submerged stiffened plate

作　　者：李宗吉[1] 孙玉臣[1] 刘宝[1] LI Zongji;SUN Yuchen;LIU Bao(Naval Engineering University,Wuhan 430033,China)

机构地区：[1]海军工程大学,武汉430033

出　　处：《应用声学》2018年第4期551-558,共8页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(11372350)

摘　　要：该文提出了一种利用虚拟声源离散声场的方法求解加肋板在水中的声振耦合问题。由波叠加原理和单元体积速度匹配的原则,根据离散的结构单元满足的动力方程和结构与介质的交界相容性条件,确定虚拟声源强度,计算结构的声辐射功率。该文以简支矩形加肋板为例,在不获得结构表面振速和声压的情况下,计算了结构在水中的声辐射功率,并与解析方法计算的结果进行了比较,表明了该方法具有较好的计算精度。An method with the use of virtual sound sources to disperse sound field is developed to solve the vibro-acoustic problem of a stiffened plate in water.Based on wave superposition principle and the principle of volume velocity matching,through structure vibration equation and boundary compatibility conditions satisfied by the structural units,the strength of virtual sound sources can be determined and the sound radiation power can be obtained.Without computing structural surface velocity and sound pressure,the paper gives an example of a rectangular stiffened baffled plate with simply supported boundary to calculate its sound radiation power.Through compared with the analytic results,it is shown that the mentioned method can ensure high precision.

关 键 词：虚拟声源 波叠加 声振耦合 声辐射 

分 类 号：TB532[理学—物理] TB533[理学—声学]