WB法分析圆柱壳与声耦合问题  

Wave Based Method for Coupled Structural-acoustic Systems with Cylindrical Shell Components

作　　者：李志江[1] 彭伟才[1] 李鹏[1] 何锃[1] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074

出　　处：《武汉理工大学学报》2009年第14期57-59,共3页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(10872075)

摘　　要：描叙了圆柱壳与声耦合系统建模技术的基本概念。根据WB法(Wave based method,简称WB法)的基本原理,将结构场变量和声压展开成波函数和特解函数的叠加。应用加权余量法将结构和声学边界条件以及结构与声耦合界面上的连续性条件转换成近似积分,推导出一组由代数方程表示的耦合模型。通过分析二维的算例表明这种预报技术计算量小且精度高,因此可应用到中频的分析。This paper describes the basic concept of the technique for the modeling of the coupled vibro-acoustic system with cylindrical shell components. According to the principle of wave based （WB） method, the structural field variable distributions and acoustic domains are approximated in terms of wave functions and particular solutions. The acoustical and structural boundary conditions, the continuity of the normal fluid and structural displacements along the coupling interface, are transformed into a weighted residual formulation; the results in a set of algebraic equations are represented by the wave model. It is illustrated through a two-dimensional validation example that the new prediction technique yields a high accuracy with a substantially smaller computational effort, so that the new prediction technique can be applied to mid-frequency analysis.

关 键 词：中频响应 结构与声耦合 Trefftz法 数值预报技术 

分 类 号：O42[理学—声学] O327[理学—物理]