Self-gravity simulation method based on distance control grid encryption

The invention belongs to the technical field of space gravitational wave detection, and particularly relates to a self-gravity simulation method based on distance control grid encryption. The method comprises the following steps: acquiring position, size and volume density data of a cubic TM to be researched; analyzing the grid file of the external quality source to obtain the vertex number and the coordinate of an initial grid unit; carrying out local grid encryption processing on the initial grid unit by using distance information between an external quality source and the TM and adopting a grid encryption method based on distance control; and calculating the gravitational force and gravitational gradient of the grid units subjected to local grid encryption processing on the TM so as to complete self-gravitational force simulation. According to the method, the total unit number of mass bodies around the test mass is effectively reduced, the calculation efficiency is improved, the generated grids have the ch