声学-结构设计灵敏度分析  

ACOUSTIC-STRUCTURAL DESIGN SENSITIVITY ANALYSIS

作　　者：白杨[1] 汪鸿振[1] 

机构地区：[1]上海交通大学振动,冲击,噪声国家重点实验室,上海200030

出　　处：《振动与冲击》2003年第3期43-45,共3页Journal of Vibration and Shock

摘　　要：声学 -结构设计灵敏度分析揭示了结构振动引起的辐射声压与结构设计变量之间的关系。分别用有限元法和边界元法计算结构设计灵敏度和声学灵敏度。将两个灵敏度结合得到最终的声学 -结构设计灵敏度。在边界元计算中 ,采用退化元处理奇异积分问题 ,对特征频率不唯一问题采用CHIEF方法处理。以脉动球和箱体为例 ,验证了算法的可行性和精确性。An algorithm for sensitivity analysis in acoustic-structural design is developed that can perform sensitivity analysis of rational sound pressure with respect to structural design variables.The structural design sensitivity and acoustic sensitivity are calculated using FEM and BEM respectively,and then these sensitivities are linked to obtain the acoustic-structural design sensitivity.During the BEM calculation,degenerative elements are used to overcome the singularity of integrals,and the CHIEF method is employed to solve the nonuniqueness problems.The validity and accuracy of the algorithm is demonstrated through the examples of pulsating sphere and radiating box.

关 键 词：声学-结构 设计灵敏度 结构振动 辐射声压 声学灵敏度 特征频率 边界元法 有限元法 辐射噪声 

分 类 号：TB53[理学—物理]