Method for determining ply angle direction and thickness of laminated board composite material

The invention relates to a method for determining the ply angle direction and thickness of a laminated board composite material. The method comprises the following steps of: (1) establishing a laminated board composite material design model, converting discrete variable in the model into continuous variable, adding corresponding restraints and generating a plurality of particles according to a specific initialization scheme, wherein the coordinate value of each particle is a design scheme; (2) recording the initial coordinate value of each particle as an individual optimal scheme to further obtain a global optimal design scheme; (3) updating positions of the particles first by using a particle swarm design method, and carrying out different maximum-iterations mathematical programming designs according to different types of the particles; (4) obtaining a new potential design scheme of the laminated board composite material and updating the individual and global optimal design schemes; (5) judging whether convergence conditions are met, and if not, turning to the step (3); and (6) taking the ply thickness in the global optimal design scheme and the ply direction of the rounded laminated board composite material as a final design scheme of the laminated composite material.