Bituminous mixture discrete element model construction method based on intersection discrimination and convex optimization

The invention provides an asphalt mixture discrete element model construction method based on intersection discrimination and convex optimization, and the method specifically comprises the steps: 1, setting a designated region in Matlab, and putting aggregate in the designated region; 2, the aggregate contour information is imported into PFC2D, and a polygonal wall corresponding to the aggregate contour is established; step 3, constructing a designated area which is the same as the designated area in the step 1 in the PFC2D to serve as a designated area wall body; the polygonal wall body in the second step is arranged in the wall body of the designated area; then circular particles are generated in the wall body of the designated area and are arranged to be full of the whole wall body of the designated area; step 4, simulating aggregate formed by polygonal walls, and identifying small circular particles outside all the polygonal walls as asphalt mortar particles; and 5, establishing a two-dimensional asphalt