Optimization simulation method for structural analysis of semi-submersible platform

The invention discloses an optimization simulation method for structural analysis of a semi-submersible platform. The optimization simulation method for structural analysis of the semi-submersible platform comprises the following steps: S1, calculating section attributes of a buoyancy tank and a stand column of a ship body according to the section of the ship body; s2, simplifying a buoyancy tank and a stand column of the ship body into a square cross-section beam unit with a uniform cross-section attribute; s3, calculating the rigidity of a ship system mooring line and a suspension stand pipe; s4, corresponding constraint is simplified into constraint on the corresponding position of the ship body by a spring; s5, the connecting parts of the ship body stand columns and the upper modules are simplified into combinations of plate units and beam units; and S6, combining the simplified ship body model, the simplified connecting part model and the upper module model constructed by the rod system units, so as to o