有限单元法中笛卡尔坐标系下六面体单元刚度阵-finite element method Cartesian coordinate system hexahedral element stiffness matrix

处理六面体，四面体，四边形和三角网格。拉格朗日，层次，以及单项有限元。接口PETSc解，自适应网格加密，和极端portablility -Handling hexahedral, tetrahedral, quadrilateral and triangular meshes. Lagrange, level, and the individual finite element. PETSc solution interfaces, adaptive mesh refinement, and e

重力计算方法直立六面体正演程序，很好用的。编写的不好大家多多指教-Gravity method upright hexahedral forward process, well used. All the exhibitions prepared by the bad

多种单元网格划分，包括8节点、20节点六面体单元、三角单元-Multiple unit mesh, including an 8-node, 20-node hexahedral elements, triangular units, etc.