Three-dimensional grid model tetrahedralization method

The invention discloses a kind of three-dimensional grid model tetrahedralization method, comprise the following steps: (1), model initial position pretreatment；(2), body-centered cubic structure is built；(3) node symbol and the point of contact on the contrary tetrahedron limit of two ends node symbol, are calculated；(4), point of contact is moved；(5), border weight tetrahedralization.Threedimensional model tetrahedralization method disclosed by the invention, based on body-centred cubic grid tetrahedralization algorithm, add the pretreatment of threedimensional model principal component analysis, the move mode steering model characteristic point improving model boundary point of contact moves, and final tetrahedral grid employs density energy error function to optimize the position of node.After threedimensional model uses principal component analysis, improve the quality of initial tetrahedral unit；Improve point of contact to move to model characteristic point and ensure that the local feature of model after tetrahedralization；Density energy error function optimizes the quality of final tetrahedral grid.