有限长加筋圆柱壳水下声辐射的精细传递矩阵法

基于传递矩阵法,结合非齐次项的精细积分方法,提出了一种求解加筋圆柱壳动响应的精细传递矩阵方法。该方法基于圆柱壳结构的一阶振动微分方程,得到加筋圆柱壳的场传递矩阵和点传递矩阵,结合非其次项的精细积分方法和增维存储的办法考虑广义声压激励的作用。利用流固耦合交界面处的连续条件,实现声压系数的求解。开展了模态收敛性分析,并将数值计算结果与试验结果进行对比,验证方法的有效性。同时分析了边界条件及环肋数目等对声辐射的影响。

Acoustic radiation of submerged ring-stiffened cylindrical shells with Precise Transfer Matrix Method

Based on transfer matrix method, combined with precise integration method (PIM) of non-ho-mogenous term, a Precise Transfer Matrix Method is developed for vibro-acoustic analysis of stiffened cylin-drical shell. The field transfer matrixes and point transfer matrixes can be obtained from a set of the first-order differential equations. The effects of generalized sound pressure can be considered by the techniques of increment storage and addition theorem. Then, the vibro-acoustic responses under point force excitation and sound pressure excitation can be solved by using continuous conditions on fluid solid interface. In ad-dition, the convergence test of modes order is investigated. Results of the present method are also compared with model test results. The influences of ring ribs and boundary conditions on the vibro-acoustic respons-es are analyzed.