采用积分方程仿真粗糙地面下方金属和介质管线的电磁散射.由于地下的土壤是分层的,根据面等效原理、边界条件以及目标在分界面上方还是下方,分别列出相应的积分方程,采用矩量法求解积分方程.粗糙地面的建模采用谱快速傅里叶变换(FFT)方法和高斯谱,仿真了粗糙地面下方圆截面和矩形截面的管线.仿真结果表明,本文的分析方法能够计算地下管线的电磁散射.%Electromagnetic scattering of the metal and dielectric pipeline beneath the rough ground is simulated by using integral equation. Because the soil underground is hierarchical, the integral equations are listed separately according to the surface equivalence principle and boundary conditions, above or below the target in the interface. These integral equations are solved by using the moment method. Utilizing Fast Fourier Transform(FFT) spectral method and Gaussian spectrum to model the rough ground, the simulation of the pipelines with a circular cross section and a rectangular cross section under the rough terrain is performed. The simulation results indicate, the analysis method in this paper is able to calculate the electromagnetic scattering of underground pipelines.
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