利用Delaunay三角化这种网格非结构化方法,通过编程实现了二维模型的非结构化三角形网格剖分,并编写了中心回线法瞬变电磁2.5维有限元正演程序.与前人计算结果对比,在取得相同计算精度的情况下,与结构化网格相比,非结构化网格所需网格和节点数量大大减少,计算效率更高.通过将非结构化网格法引入到瞬变电磁2.5维正演模拟中,实现了对复杂二维地电模型的有限元数值模拟,提高了现有有限元算法的应用范围.%In this paper, Delaunay triangulation method was used to realize unstructured triangular mesh generation of 2D model through programming, and the central loop transient electromagnetic method 2.5D finite element forward modeling program was completed. Compared with the previous results and under same accuracy condition, the number of grids and nodes of unstructured grid method is significantly reduced and computational efficient compared with the structured grid. By introducing the unstructured grid method to 2. 5-D transient electromagnetic forward modeling, we realized the finite element numerical simulation of complex 2D geo-electric model and improved the existing finite element method's range of applications.
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