声呐导流罩内声场特性研究  

Research on inner sound field characteristics of sonar dome

作　　者：张洋波[1] 

机构地区：[1]中国船舶重工集团公司第七一〇研究所,湖北宜昌443003

出　　处：《声学技术》2014年第5期422-426,共5页Technical Acoustics

摘　　要：为研究机械激励下声呐导流罩壳内噪声预报问题,采用数值计算(有限元法-边界元法)结合实验的方法对一导流罩模型的壳内声场进行研究。首先依据实际导流罩模型建模,并加载机械激励进行数值计算,得到壳内声场的均方声压,然后进行湖内实验测量,最后对比了数值计算和实验的结果。研究表明:有限元法加间接边界元法是分析导流罩内声场这种封闭结构流-固-声耦合问题的有效方法;导流罩壳内声场的数值计算结果与实验测量结果吻合较好;声场均方声压与结构均方振速之比反映了罩壳结构内平均声场特性,可用来对比分析数值计算和实验的结果。In order to study the problem of interior noise prediction of sonar dome under mechanical excitation, the method combining numerical method （FEM-BEM） with experimental method is used to study the interior sound field of the sonar dome. Firstly, the sonar dome model is built based on the actual model. Then the numerical calculation is carried out with the mechanical excitation applied on the model and the mean square sound pressure of interior sound field can be obtained, and then the experiment is made in a lake. Finally, the numerical calculation results and experi-mental results are compared. The research shows： the method of FEM ＋ IBEM is valid for studying the coupling problems of structure and sound for a close system, for example, the inner sound field of a sonar dome. The experimental results are in accord with simulation results;the ratio of mean square sound pressure to mean square vibration velocity represents the inner average sound field characteristic of a dome shell structure and can be used to compare and analyze the results of numerical calculation and experiment.

关 键 词：导流罩 有限元 边界元 结构声耦合 内声场 

分 类 号：TB56[交通运输工程—水声工程]