Pekeris波导环境中的水下运动声场仿真研究

对Pekeris波导环境中水下运动声源的声场进行了研究。将Pekeris波导中数值稳定的波数积分解和一维近似的波数积分方法运用于求解运动声源的声场。推导了运动声源声场的二维波数积分表达式,给出一维近似解,并在计算深度格林函数时引入数值稳定的计算方法。在仿真实验中,首先在自由空间条件下验证了一维近似的波数积分方法的准确性;再结合Pekeris波导中数值稳定的波数积分方法来分析运动声源的声场特性。通过改变波导和声源、接收器条件仿真研究Pekeris波导中运动声源声场的频率展宽和频移特性。

Sound field simulation study of an underwater moving source in the Pekeris waveguide

The sound field of an underwater moving source in the Pekeris waveguide environment is studied in this paper. A numerically stable wavenumber integration solution and the one-dimensional approximate wavenumber integration method are applied to solving the sound field of a moving source in the Pekeris waveguide. The twodimensional wavenumber integral expression of the moving source is deduced, and the one-dimensional approximate solution is given. A numerically stable calculation method is introduced in the calculation of the depth Green''s function. In the simulation experiment, the accurateness of the one-dimensional approximate wavenumber integration method is first verified under free space conditions. Combined with the numerically stable wavenumber integration method in the Pekeris waveguide, the sound field characteristics of a moving point source are simulated and analyzed.The frequency broadening and frequency shifting characteristics of the sound field of the moving source in the Pekeris waveguide are investigated by changing the waveguide and the source and receiver conditions.