水下结构声主动控制压电传感器/作动器布置研究  

Study of piezoelectric sensor/actuator scheme for underwater structural acoustics active control

作　　者：孙超[1,2] 赵德有[1] 

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]北京航天微机电技术研究所,北京100094

出　　处：《大连理工大学学报》2010年第6期969-977,共9页Journal of Dalian University of Technology

摘　　要：研究了板水下声辐射主动控制时压电传感器/作动器的布置问题.基于声振耦合理论,在低于临界频率情况下对结构模态和声极子的相互关系做了深入的分析,建立了板波数和辐射声功率间的关系,并据此提出了模态抑制和模态重组方法相结合的压电片布置方案.结合有限元/边界元数值计算方法,对所提出的压电片布置方案进行了结构辐射声功率控制的定量计算.与应变理论和角落单极子理论相比,基于声振耦合理论的压电片布置方案在高频段给出了更好的辐射声功率控制效果,同时所需要的控制作动电压相对大幅下降.A theoretical and numerical investigation of piezoelectric sensor/actuator scheme for the active control of underwater structural acoustics radiation is performed.Based on structural-acoustic coupling theory,a detailed analysis of the relationship between structural modal and sound poles is presented below critical frequency.Qualitative relation between acoustic radiation power and wavenumber of plate is given.A piezoelectric patches scheme is introduced which combined modal suppression method with modal reconstruction method.Based on the numerical computation method of finite element method/boundary element method（FEM/BEM） ,quantitative analysis of the control of acoustic radiation power is done according to disposal scheme of piezoelectric patches.The disposal scheme of piezoelectric patches based on the theory of structural-acoustic coupling gives a better acoustic radiation power control result compared with the other two schemes based on strain theory and corner monopole theory at high frequency.Furthermore,a lower voltage is demanded when a better control result is gotten.

关 键 词：压电片 主动控制 声振耦合 声辐射 

分 类 号：TB535[理学—物理]