基于无限元法研究阻尼对船舶结构水下声辐射特性影响  

Influence of damping on the underwater acoustic radiation characteristics of the ship structures based on IEM

作　　者：邱中辉 吕帅[1] 郑律[1] 丛刚[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《船舶》2013年第1期40-44,共5页Ship & Boat

摘　　要：船舶结构的水下声辐射问题,可利用无限元方法求解水下无界域声场,以只有4个节点的无限元映射网格代替流场网格,而无需建立流场单元。分析典型圆柱壳体结构的水下声辐射特性,既考虑了声固耦合的作用,又减小了模型的规模,大大提高计算效率;同时基于声学阻抗原理及声学无限元方法,研究阻尼对船舶结构水下声辐射特性影响,为船舶实际工程设计提供参考。Infinite element method （IEM） can be used to solve the infinite acoustic field of underwater acoustic radiation of ship structures. The fluid field elements do not need to be buih because it can be replaced by infinite element mapping with 4 nodes. This paper analyzes the underwater acoustic radiation characteristics of the typical cylindered shells,which taking the structural-acoustic coupling effect into account, reducing the model scale and improving computational efficiency. Based on acoustic impedance theory and acoustic IEM,the influence of damping on underwater acoustic radiation characteristics of ship structures is studied to provide references for practical ship design and construction.

关 键 词：声无限元法 声固耦合 圆柱壳 阻尼 声辐射 

分 类 号：U661[交通运输工程—船舶及航道工程]