Method for establishing geomembrane local deformation three-dimensional simulation model on random particle cushion layer

The invention discloses a method for establishing a geomembrane local deformation three-dimensional simulation model on a random particle cushion layer. The method comprises the following steps: step1, drawing a particle cushion layer region; step 2, determining the number of spherical particles with different particle sizes in the cushion layer area; step 3, randomly generating balls with the maximum particle size of d1; step 4, randomly generating spheres with the particle sizes of d2, d3,..., dn; step 5, generating a random particle cushion layer; 6, carrying out geomembrane generation; and 7, carrying out geomembrane local deformation calculation and damage judgment. According to the invention, the three-dimensional simulation model can be established at a high speed; the computing workload is small, the simulation effect of the random cushion layer particles is more realistic; the contact between the particle cushion layer and the geomembrane is closer to the real state, the local deformation calculation