声全息测量架对近场时空频特性影响规律分析  

Analysis of the Influence of Acoustic Holographic Measurement Frame on Near-field Spacetime Frequency Characteristics

作　　者：柯慧程 彭子龙 胡宇安 宋昊 朱军超 KE Huicheng;PENG Zilong;HU Yuan;SONG Hao;ZHU Junchao(School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;Systems Engineering Research Institute,China Ship Group Co.,Ltd.,Beijing 100094,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212003 [2]中国船舶集团有限公司系统工程研究院,北京100094

出　　处：《噪声与振动控制》2024年第4期29-36,共8页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52201397);装备综合保障技术重点实验室稳定支持资助项目(WDZC20235250311)。

摘　　要：在开展水下声全息测量时,常常忽略测量支架及其他辅助设备引起的测量误差。基于有限元法分析在Benchmark模型周围上加装声全息测量架后对近场声散射测量精度的影响。通过对共形圆环阵测量架提取多路测点的声场数据,分析入射波频率、角度以及测量架材料对近场声全息声场测量误差的影响。研究发现:在散射效应较弱的入射角度区间内加装声全息测量架,测量的散射声压变化较为敏感;分布在靠近声全息测量架处测点接收到的声学数据误差较大,出现较多峰值;材料特性阻抗较大的测量架引起的误差高于特性阻抗较低的测量架。In underwater acoustic holography measurements,the measurement errors caused by measurement frames and other auxiliary equipment are often neglected.In this paper,the effect of adding an acoustic holographic measurement frame around the benchmark model on the accuracy of near-field acoustic scattering measurements is analyzed by means of the finite element method.The effect of incident wave frequency,incident angle and measurement frame material on the measurement error of the near-field acoustic holographic sound field is analyzed by extracting the sound field data from multiple measurement points on the measurement frame of the conformal circular array.It is found that the scattered sound pressure variation measured by adding an acoustic holographic measurement frame in the incident angle interval,where the scattering effect is weaker,is more sensitive;the acoustic data received at the measurement points near the acoustic holographic measurement frame has higher errors and more peaks;the errors caused by measurement frames with higher material characteristic impedance are larger than those caused by frames with lower characteristic impedance.

关 键 词：声学 声全息 测量架 声散射 测量误差 

分 类 号：TH113[机械工程—机械设计及理论] TH113.1TH133.3