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本文给出了关于高磁化率(K>1SI)物体的静磁场问题的数值解方法。给出该问题的面积分方程。对两种不同的几何形体:其界面近似于与坐标系平面一致的矩形面的三度体以及边界的横断面近于任意方位线段的2(1/2)度体(译者注:似二度体),通过子区间法用数值解积分方程。研究了一定数量的实例。这些实例表明:如果模型的磁化率高于1SI 单位时,退磁系数法就不能用于静磁异常的计算。给出了磁化率在0.1-900SI,单位范围内轴比为1:1:2的立方体和棱柱体的退磁系数。表明这些模型当磁化率很小(不超过0.1SI 单位)时,其主轴方向的退磁系数分量之和近似等于1;当磁化率等于900SI 单位,其和减小到0.85。
In this paper, we give a numerical solution of the problem of the static magnetic field of high magnetic susceptibility (K> 1SI) objects. The area integral equation of the problem is given. For two different geometries: the third-degree body whose interface approximates the rectangular one that coincides with the plane of the coordinate system and the second-half body that has a cross-section of the boundary that is close to any azimuth line segment. Degrees), using numerical sub-interval method to solve the integral equation. A number of examples have been studied. These examples show that the demagnetization factor method can not be used for the calculation of magnetostatic anomalies if the susceptibility of the model is higher than 1 SI units. The demagnetization coefficients of cube and prism with the magnetic susceptibility in the range of 0.1-900 SI and the axial ratio of 1: 1: 2 in the unit range are given. These models show that the sum of the demagnetization coefficient components in the major axis direction is nearly equal to 1 when the susceptibility is small (up to 0.1 SI units), and decreases to 0.85 when the susceptibility is equal to 900 SI units.