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由地形线上的磁场垂直分量Z计算水平分量H,对山区磁测资料的解释是很有意义的.鉴于目前有限单元法在各工程领域得到广泛应用,成为一种高效、通用的计算方法,本文提出二维磁场Z、H分量互相换算的有限单元法. 基本原理首先阐明由Z求H的基本原理. 在无源空间Ω,磁场水平分量H满足拉普拉斯方程??~2H=0,如果已知H的第二类边界条件??=f,其中n为区域Ω的边界??的外法向,f为已知函数,则求解Ω和??上的H,就等于解下列边值
It is very meaningful to calculate the horizontal component H from the vertical component Z of the magnetic field on the terrain line to explain the magnetic data in the mountain area.As the finite element method is widely used in various engineering fields at present, it becomes an efficient and universal calculation method, In this paper, we present a finite element method for the mutual conversion of Z and H components in a two-dimensional magnetic field. The basic principle first expounds the basic principle of finding the value of H in Z. In the passive space Ω, the horizontal component H of the magnetic field satisfies Laplace’s equation , If we know the second type of boundary conditions of H = f, where n is the outer normal of the boundary of the area Ω and f is a known function, solving for Ω and H on is equal to solving the following Edge value