Abstract Due to the fields in the near-field area of an electric dipole source which is sharply and rapidly varying with distance, a novel approach to introduce an underwater low-frequency excited source is proposed in this paper. The approach is built up to combine the theoretical solution for an electric dipole in a conductive medium with the total-field scattered-field boundary to reduce the error in modeling the source. The spatial distributions of the magnetic field amplitude at a distance of 1 km above the sea surface are discussed. The numerical results verified the accuracy and validity of the approach by comparing with the results of the Sommerfeld numerical integration method.

中文翻译：

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使用 TSS-FDTD 精确模拟水下电偶极子源的方法

摘要 针对电偶极源近场区域的场随距离急剧快速变化的特点，本文提出了一种引入水下低频激励源的新方法。该方法旨在将导电介质中电偶极子的理论解与全场散射场边界相结合，以减少对源建模的误差。讨论了离海面 1 公里处磁场幅度的空间分布。数值结果与Sommerfeld数值积分方法的结果进行对比，验证了该方法的准确性和有效性。