基于波叠加方法的水下声源辐射声场预报及实验研究  

Prediction of underwater sound source radiation based on wave superposition method and relevant experiments

作　　者：孙超 何元安 商德江 尚大晶 刘月婵 张若愚 

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 [2]船舶系统工程部,北京100036 [3]北京神州普惠科技有限公司,北京100085

出　　处：《振动与冲击》2013年第10期130-135,140,共7页Journal of Vibration and Shock

基　　金：国防技术重点实验室基金资助(9140C2007021005)

摘　　要：根据基于波叠加方法的声全息技术研究了水下声源的辐射声场预报问题,通过水听器阵列测得的复声压预报三维空间声场的声特性。数值仿真分析了一有限长圆柱壳模型在不同频率力激励作用下的声场预报精度,发现测量阵列尺寸与结构尺寸相近即可准确预测声场。水池和湖上实验分别对柱形换能器声源和加肋双层圆柱壳受激辐射声场进行了预测并和实测值进行了对比,结果表明该方法是一种稳健有效的声场预报方法。不同频率下,二者误差一般在3 dB以内,能够满足工程需要。为实际水下大型结构的空间声场预报和降噪性能预估提供了工程参考。Wave superposition method was used for the prediction of sound radiation of underwater sound source. Through the complex sound pressure measured by hydrophone array, three-dimensional sound field characteristics were predicted. By numerical simulation, a finite long cylindrical shell model under different frequency force excitations was analyzed for inspecting the accuracy of sound prediction. It is found that the size of measurement array needs only to be close to that of the structure. The excited radiated sound fields of a cylindrical transducer and a double cylindrical shell with ribs were predicted and the results were compared with measured results. The results show that the method is robust and effective. The error is less then 3dB under different frequency excitations, which can satisfy the engineering requirement. The results give reference to the sound radiation prediction and noise reduction performance estimation of underwater large-scale structures.

关 键 词：辐射声场预报 波叠加法 模型实验 

分 类 号：TB535[理学—物理]