水下加筋圆柱壳声辐射特性分析的改进精细传递矩阵法  

An improved precise transfer matrix method for the analysis of acoustic radiation of ring-stiffened cylindrical shells

作　　者：庞福振[1,2] 吴闯 王献忠 姚熊亮 

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001 [2]海军装备研究院,北京100161 [3]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《振动与冲击》2017年第22期131-137,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51209052);黑龙江省青年科学基金资助项目(QC2011C013);上海交通大学海洋工程国家重点实验室基金(1307);国防预研项目(4010403010103);中央高校基本科研业务费资助项目(HEUCF40117);中国博士后基金(2014M552661)

摘　　要：基于Flügge壳体振动理论,将改进精细传递矩阵法应用于水下加筋柱壳声辐射问题的求解;通过应用加法定理和增量存储,改进非齐次项求解方法,构造了加筋圆柱壳的辐射噪声改进精细传递矩阵法。分析了边界条件、结构损耗因子、流体介质以及壳体厚度对加筋圆柱结构声辐射的影响。研究表明,当边界条件从自由、简支到刚固,结构对外辐射声压逐渐降低;随着结构损耗因子的增大,结构对外辐射声压大体上逐渐降低。Based on the Flügge shell theory,an improved precise transfer matrix method（ IPTMM） was applied to the solution of acoustic radiation for stiffened cylindrical shells. According to the techniques of addition theorem and increment storage,calculation of inhomogeneous was improved. Then,the improved precise transfer matrix method was obtained. The effects of different end boundary condition,structural damping,fluid medium and shell thickness were presented. The results show that when the boundary conditions from freedom supported and simply supported change to rigidly fixed, external radiation acoustic pressure of structure gradually reduces. With the increasing of structural damping,external radiation acoustic pressure of structure gradually reduces.

关 键 词：非齐次项 精细积分传递矩阵 加筋圆柱壳 振动 声辐射 

分 类 号：U661.44[交通运输工程—船舶及航道工程]