随机激励下结构振动声辐射的灵敏度分析和优化设计  

Sensitivity analysis and design optimization of acoustic radiation from random excited structures

作　　者：刘宝山[1,2] 赵国忠[2] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266555 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《振动工程学报》2011年第3期309-314,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金(11072049);辽宁省教育厅创新团队项目(LTZ010018);中央高校基本科研业务费专项资金(DUT10LK39)资助项目

摘　　要：基于有限元法、边界元法和虚拟激励法,对随机激励下结构振动声辐射灵敏度分析及优化设计问题进行研究。有限元法用于计算结构谐振响应,边界元法用于计算结构振动声辐射,虚拟激励法结合有限元和边界元计算随机激励下结构振动声辐射问题。提出随机激励下结构振动声辐射问题的优化模型及求解算法流程,重点推导了其灵敏度分析公式。数值算例验证了灵敏度分析的准确性及优化求解算法的有效性。Based on FEM,BEM and PEM（pseudo excitation method）,acoustic radiation sensitivity analysis and design optimization from random excited structures are investigated in this paper.FEM is used to calculate structural responses,and BEM is used to calculate structural acoustic radiation.PEM combined with FEM and BEM is used to solve the problem on random acoustic radiation.Design optimization model and optimization algorithm flow are presented,and the sensitivity analysis formula are derived on emphasis.Numerical examples show the accuracy of sensitivity and the effectiveness of solved algorithm.

关 键 词：有限元 边界元 虚拟激励法 声辐射 优化设计 

分 类 号：TB533[理学—物理] TB532[理学—声学]