计及层间水的水下双层圆柱壳声振特性研究  

Vibro-acoustic responses analysis of submerged double-walled cylindrical shells with interlayer water

作　　者：王献忠[1,2] 林鸿洲 江晨半 顾鑫 WANG Xianzhong;LIN Hongzhou;JIANG Chenban;GU Xin(Key Laboratory of High Performance Ship Technology,Ministry of Education,Wuhan University of Technology,Wuhan 430063,China;School of Transportation,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学高性能船舶技术教育部重点实验室,湖北武汉430063 [2]武汉理工大学交通学院,湖北武汉430063

出　　处：《华中科技大学学报（自然科学版）》2020年第8期109-114,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51779201);装备预研教育部联合基金资助项目(6141A02022139);湖北省自然科学基金资助项目(2018CFB607)。

摘　　要：建立了计及层间水的水下双层圆柱壳声振模型.基于精细积分法,获取内外壳的场传递矩阵,采用两种思路推导了环形板的点传递矩阵,分别提出了外流场和层间水的声压近似表达式,组装得到计及层间水的水下双层圆柱壳声振耦合方程,并考虑了内外壳两端弹性边界的影响,结合内外壳和外流场及层间水的声固耦合作用,实现计及层间水的水下双层圆柱壳振动和水下辐射声场解.将理论值与模型试验结果进行对比,验证了该双层圆柱壳声振模型的可靠性和有效性,并分析了四类约束刚度对水下双层圆壳声振特性的影响规律.结果表明:弹性约束位置对于高阶模态的固有频率影响比低阶模态大;水下双层圆柱壳约束边界的轴向刚度、周向刚度和径向刚度对水下辐射噪声均较大.A vibro-acoustic model of underwater double-walled cylindrical shells with interlayer water was established.The field transfer matrices of the shell and the point transfer matrices of the annular plate were derived. The approximate formulas were constructed for radiated noise of external flow field and interlayer water.The coupled vibro-acoustic equations were obtained by assembling the whole transfer matrices.The vibro-acoustic response of the double-walled cylindrical shell was solved by considering the elastic boundary conditions at both ends. The analytical solution and test results were compared to verify reliability of the vibro-acoustic model.And the effect of four kinds of boundary restraints stiffnesses on the natural frequency and sound pressure level was also analyzed.It can be concluded that the influence of the location of elastic constraint on the natural frequency of the high-order mode is more obvious than that of the low-order mode.The axial,circumferential and radial restraints stiffnesses of the double-walled cylindrical shell have great influence on the sound pressure level.

关 键 词：双层圆柱壳 任意边界 振动 声辐射 层间水 

分 类 号：TB53[理学—物理]