三维浮体声弹性问题的一些研究(英文)  

Three-Dimensional Sono-elasticity Analysis of Floating Bodies

作　　者：邹明松[1] 吴有生[1] 叶永林[1] 孙建刚[1] 祁立波[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2013年第3期298-305,共8页Journal of Ship Mechanics

摘　　要：在经典的三维水弹性力学理论的基础上,考虑水介质的可压缩性,形成通常所说的水中声弹性理论。提出带航速和考虑自由液面影响的,承受机械和波浪等多种载荷激励下的浮体流固耦合振动及水下辐射噪声计算方法;并介绍了一种消除简单源数值算法中非规则频率现象的方法。针对无限大流体中的弹性球壳结构声辐射模型进行一系列数值计算,通过与解析结果的比较,验证了计算方法的正确性。在此基础上,计算了一机械激励下双层加筋圆柱壳的水下辐射噪声,并根据数值结果,对近、远场声特性进行了讨论。Sono-elasticity theory in water based on the classic three dimensional hydroelasticity considering compressibility of the water medium is formed. Put forward a method that calculates the acoustic responses of a floating body induced by the machinery and wave excitations, with forward speed and free surface. At the same time, a method for eliminating the irregular frequencies in the numerical analysis is proposed. The acoustic radiation of an elastic spherical shell in infinite fluid is predicted and compared with analytical solution for validation. The acoustic radiations of a submerged ring-stiffened cylindrical hull is also calculated, and according to the numerical results the near field and far filed acoustic characteristics are discussed.

关 键 词：水弹性 声弹性 自由液面 非规则频率 声辐射 球壳 

分 类 号：TV131.2[水利工程—水力学及河流动力学]