基于矢量阵测量的振速重构近场声全息技术  

Near-field Acoustical Holography with Particle Velocity Based on Measurement of Vector Hydrophone Array

作　　者：胡博 杨德森 孙玉 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001

出　　处：《机械工程学报》2010年第22期16-23,共8页Journal of Mechanical Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCFR1013)

摘　　要：近场声全息技术是一种声源识别和声场可视化技术,它通过在辐射体的近场测量声压数据可以重建和预测出整个三维空间声场的声学量。针对水中声源的振速重构问题,采用质点振速测量来进行声全息重构,推导基于振速重构的平面近场声全息技术的重建公式。利用所编制的程序进行仿真验证,采用矢量水听器进行水中全息试验,验证矢量阵应用于水中近场全息测量的可行性和准确性。试验结果表明,该技术在水中声源辐射声场的噪声源识别和定位中有着明显的优势。Near-field acoustical holography is a powerful tool for identifying sound sources and visualizing sound field.By recording the acoustic pressures in the near-field,the acoustic quantities in the whole 3D field can be reconstructed and predicted.For using this method to identify the noise source in underwater sources,the principle of near-field acoustical holography based on measurement of particle velocity is presented.The numerical simulation is conducted.The feasibility and accuracy of vector hydrophone array applied in underwater near-field holographic measurement are verified through tests.The test results show the merits of the underwater NAH with particle velocity in the reconstruction of sound field,identification and localization of the noise sources.

关 键 词：近场声全息 声压 质点振速 矢量阵 

分 类 号：TB535[理学—物理]