Finite element mesh rapid automatic generation method for parallelepiped target plate

The invention discloses a method for quickly and automatically generating a finite element mesh of a parallelepiped target plate, which comprises the following steps of: firstly, determining geometric parameters of the parallelepiped target plate, including thickness, height, width, orientation, offset distance and inclination angle, dividing the parallelepiped target plate into hexahedrons with specific shapes, the method comprises the following steps: firstly, selecting a parallelepiped target plate, then determining the number of grids of edges of each hexahedron in a specific shape and determining corresponding node coordinates, then performing mirror image supplement on the node coordinates, then expanding to node coordinates of the parallelepiped target plate, outputting a structured finite element grid, and finally sorting the node coordinates of the structured grid to obtain a structured finite element grid. And the output is the unstructured finite element mesh for calculation such as penetration, lo