考虑声振耦合的散射声场优化研究  

Optimization of Scattered Sound Considering Acoustic Vibration Coupling

作　　者：李宗吉[1] 王旭东[2] 傅泽锟 王德石[1] LI Zongji;WANG Xudong;FU Zekun;WANG Deshi(School ofWeaponry Engineering,Naval University of Engineering,Wuhan 430033,China;Weaponry Department,Naval Petty Officer Academy,Bengbu 233012,Anhui,China)

机构地区：[1]海军工程大学兵器工程学院,武汉430033 [2]海军士官学校兵器系,安徽蚌埠233012

出　　处：《噪声与振动控制》2025年第1期1-6,共6页Noise and Vibration Control

基　　金：国家自然科学基金青年基金资助项目(12104510)。

摘　　要：针对表面铺设柔性层的声振耦合结构散射声压最小化问题,发展一种无限/半无限空间中散射声压优化算法。考虑声介质与弹性结构的耦合作用,推导耦合系统散射声压方程;随后采用直接微分法推导出散射声压对阻尼层单元的灵敏度公式;最后以指定参考点在单一频率或频率带内的散射声压幅值最小化为目标函数,考察无阻尼/有阻尼柔性层在不同激振频率下的材料分布。结果表明:优化算法可实现柔性层材料的合理分布,有效降低激励频率处的散射声压。An optimization algorithm was developed to minimize the scattering sound pressure of acoustic vibration coupled structures with flexible layers attached to the surface of the structure.Considering the coupling effect between the acoustic medium and the elastic structure,the scattering sound pressure equation of the coupling system was deduced.Then the sensitivity of the scattering sound pressure to the damping layer was derived by using the direct differential method.Finally,the material distribution of undamped/damped flexible layers at different excitation frequencies was investigated with the objective function of minimizing the scattering sound pressure of the specified reference point at a single frequency or in a frequency band.The results show that the optimization algorithm can realize the reasonable distribution of the flexible layer materials and effectively reduce the scattering sound pressure at the driving frequency.

关 键 词：声学 声振耦合 阻尼层 声散射 声压灵敏度 拓扑优化 

分 类 号：TB535[理学—物理]