基于波叠加方法的水下声源辐射声场预报及实验研究

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3dB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。

Prediction and experiment for underwater sound source radiation based on wave superposition method

Wave superposition method is used for solving the prediction problem of the sound radiation of underwater sound source. Through the complex sound pressure measured by the hydrophone array, three-dimensional sound field characteristics can be predicted. In the numerical simulation, a finite long cylindrical shell model with different frequency force excitations is analyzed for sound prediction accuracy, and found that the sizes of measurement array and structure can be similar. Experiments are performed by using the cylinder transducer and double cylindrical shell with ribs, and the predicted and measured results are compared. The results show that the method is robust and effective. The error is less then 3dB with different frequencies which can satisfy the engineering requirement, providing the project reference of underwater large-scale structures for sound radiation prediction and noise reduction performance estimation.