环肋旋转壳声振特性分析的半数值方法  

A semi-numerical method for predicting the vib-acoustic problem of stiffened shells of revolution

作　　者：王献忠[1,2] 

机构地区：[1]武汉理工大学高性能舰船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船舶海洋与结构工程系,湖北武汉430063

出　　处：《振动工程学报》2015年第5期793-799,共7页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51409200);中央高校基础科研业务费专项资金资助项目(2014-Ⅳ-022)

摘　　要：采用精细传递矩阵法结合改进波叠加法建立了加筋旋转壳水下声辐射的数学模型,推导了旋转壳的场传递矩阵和环肋的点传递矩阵,运用精细算法克服了传统传递矩阵法的数值不稳定问题,利用改进波叠加法考虑了旋转壳上声压激励的作用,考虑流固耦合边界处的连续条件,求解了加筋旋转壳的水下辐射声。分别以摆动球、脉动球、加筋圆柱壳和球壳为例,将计算的脉动球和摆动球表面声压值和相应解析解对比;还将加肋圆柱壳的水下辐射声压周向分布和文献值及实验结果进行对比;最后将球壳的振动和水下声辐射和文献值对比,验证此方法的有效性。A coupled precise transfer matrix and modified wave superposition method is presented for predicting the structural and acoustic radiation responses of shells of revolution.Considering the effect of the ring-stiffeners,the field transfer matrixes of shells of revolution are obtained accurately by precise transfer matrix method which overcomes the numerical instability problem of traditional transfer matrix method.The sound pressure in fluid is described by modified wave superposition method which is employed to satisfy the fluid-solid coupling boundary condition.Then the structural and acoustic responses of shells of revolution are obtained finally.The structural and acoustic radiation responses of the pulsating sphere,swing ball,submerged cylindrical shell and spherical shell are compared with FEM results and test results,and they are quite close to each other.

关 键 词：声辐射 旋转壳 精细传递矩阵法 波叠加法 

分 类 号：O422.6[理学—声学] TB53[理学—物理]