Hexahedral meshes were chosen as te cover system for 3-dimensional numerical manifold method(3D NMM).

• 该文采用长方体单元作为三维数值流形方法的数学覆盖 ；在此覆盖下物理覆盖和物体的交集是刚度矩阵的积分区域 ；采用的是Hammer积分法 .