一种基于波数积分方法的线源声场计算方法
发布时间：2018-10-05 15:34
【摘要】：提出了在Pekeris波导条件下,一种基于波数积分方法的线源声场中的稳定数值计算方法。通过对深度格林函数中上行波与下行波的归一化,得到稳定的系数矩阵,从而求得格林函数的解析解。对深度格林函数进行模式展开,验证了该方法得到的深度格林函数解析解的准确性。结合仿真实例,将该方法得到的波数积分模型与传统简正波模型KRAKENC的结果进行比较,结果显示,当某号简正波的波数与海底波数接近时,KRAKENC计算不出该号简正波,会导致KARKENC的计算结果不准确,而波数积分方法可以很好地解决该问题。因此,提出的方法可以作为Pekeris波导中线源激发声场的标准模型。
[Abstract]:In this paper, a numerical method based on wavenumber integral method is proposed to calculate the stability of acoustic field in linear source under the condition of Pekeris waveguide. By normalizing the up-going and downgoing waves in the depth Green's function, a stable coefficient matrix is obtained, and the analytic solution of the Green's function is obtained. The analytical solution of the depth Green's function obtained by this method is verified by the model expansion of the depth Green's function. Combined with a simulation example, the results obtained by this method are compared with that of the traditional normal wave model (KRAKENC). The results show that when the wavenumber of a normal wave is close to that of the sea floor, the KRAKENC can not calculate the normal wave. The results of KARKENC's calculation will be inaccurate, and the wavenumber integral method can solve the problem well. Therefore, the proposed method can be used as a standard model for the excitation of sound field by a line source in a Pekeris waveguide.
【作者单位】： 中国科学院声学研究所声场声信息国家重点实验室;中国科学院大学;中国科学院声学研究所东海研究站;
【基金】：国家自然科学基金资助项目11434012;41561144006
【分类号】：P733.2
，
本文编号：2253924
[Abstract]:In this paper, a numerical method based on wavenumber integral method is proposed to calculate the stability of acoustic field in linear source under the condition of Pekeris waveguide. By normalizing the up-going and downgoing waves in the depth Green's function, a stable coefficient matrix is obtained, and the analytic solution of the Green's function is obtained. The analytical solution of the depth Green's function obtained by this method is verified by the model expansion of the depth Green's function. Combined with a simulation example, the results obtained by this method are compared with that of the traditional normal wave model (KRAKENC). The results show that when the wavenumber of a normal wave is close to that of the sea floor, the KRAKENC can not calculate the normal wave. The results of KARKENC's calculation will be inaccurate, and the wavenumber integral method can solve the problem well. Therefore, the proposed method can be used as a standard model for the excitation of sound field by a line source in a Pekeris waveguide.
【作者单位】： 中国科学院声学研究所声场声信息国家重点实验室;中国科学院大学;中国科学院声学研究所东海研究站;
【基金】：国家自然科学基金资助项目11434012;41561144006
【分类号】：P733.2
，
本文编号：2253924
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