基于有限元-边界元的声学构形灵敏度分析  

Acoustic configuration sensitivity analysis based on FEM and BEM

作　　者：陈剑[1,2] 程昊[1,2] 高煜[1,2] 张永斌[1,2] 毕传兴[1,2] 

机构地区：[1]合肥工业大学噪声振动工程研究所,安徽合肥230009 [2]安徽省汽车NVH工程技术研究中心,安徽合肥230009

出　　处：《振动工程学报》2009年第2期213-217,共5页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50575063);国家863计划重大专项资助项目(2006AA110101)

摘　　要：通过灵敏度分析可以对由结构修改而引起的局部或全部结构状态特性的变化做出估计,为设计指明方向。对结构-声学优化设计中的构形灵敏度进行研究,利用有限元、边界元数值计算方法获得辐射声压关于组合结构各构件旋转角度的半解析声学构形灵敏度公式,扩大了声学灵敏度的范畴。该声学灵敏度公式可以用来预测结构组合方式的改变而导致的空间声学量的改变。对该灵敏度公式进行数值计算,与传统有限差分法对比,证明了本文方法的正确性。Design sensitivity information provides a quantitative estimate of desirable design change. A configuration design is applicable to build-up structures with design components as truss, plate, shell etc. Based on FEM and BEM, the expressions of acoustic configuration sensitivity are presented. It provides the direction and amount of the rotation of a component in the global coordinate changes to improve the objective function. The validation and availability of the present method which compared with finite difference method are proved by the results from numerical simulations.

关 键 词：声学构形灵敏度 有限元 边界元 声辐射 

分 类 号：TB532[理学—物理]