Adaptive finite element GPR frequency domain forward modeling method
A finite element, self-adaptive technology, applied in special data processing applications, complex mathematical operations, instruments, etc., can solve the problems of cumbersome and high calculation costs, achieve good absorption effect, reduce the degree of freedom of nodes, and simplify the parameter optimization process Effect
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[0034] Such as figure 1 Shown is the method flow diagram of the method of the present invention: the adaptive finite element GPR frequency domain forward modeling method provided by the present invention includes the following steps:
[0035] S1. Set the parameters of the forward modeling method, including forward modeling frequency, model parameters and initial grid;
[0036] The initial mesh is Delaunay triangular mesh, and the mesh is divided to obtain the unstructured mesh division result;
[0037] S2. Calculate the numerical solution of the current grid according to the parameters set in step S1; specifically, use the following steps to calculate:
[0038] A. Use FEFD algorithm to calculate the numerical solution of the grid;
[0039] According to the theory of electromagnetic wave propagation (Taflove & Brodwin, 1975), the propagation of radar waves in lossy media follows Maxwell's equations, and the frequency domain representation of the two-dimensional TM wave is:
[0040]
[004...
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