水声发射换能器共形阵振速权值计算方法  

Calculation Method of the Velocity Weighting Vector for a Conformal Array of Underwater Acoustic Projecting Transducers

作　　者：何正耀[1] 马远良[1] 邹士新[1] 蒋伟[1] 

机构地区：[1]西北工业大学声学工程研究所,陕西西安710072

出　　处：《电声技术》2005年第6期4-8,共5页Audio Engineering

摘　　要：用边界元理论结合优化方法计算了水声发射换能器共形阵在期望辐射方向性下的振速加权向量,提出了振速的2种加权方式,并给出了计算实例。计算结果表明这两种加权方式都可以校正不考虑障板影响和阵元间相互作用时用平面波模型进行常规波束形成加权的指向性偏差,并且最小二范数加权可在确保声轴上某点声压一定的条件下使振速加权向量的二范数最小。The boundary element theory together with optimization method is used to calculate the vibration velocity weighting vector of a complicated conformal array of underwater acoustic projecting transducers for an expected beam pattern. The calculation results show that the two methods are both able to correct the directivity deviation of the conventional beamforming method in which the plane wave model is used and the acoustic mutual effect of the baffle and the transducers are not taking into account. Moreover, the least 2-norm method provides the least 2norm of the vibration velocity weighting vector of the array while producing the same amplitude of pressure in the axial direction.

关 键 词：发射换能器 共形阵 振速权值 边界元 优化 

分 类 号：TB56[交通运输工程—水声工程]