Portal bridge crane box girder parametric modeling and optimization design method

The invention discloses a gantry crane box girder parametric modeling and optimization design method, which belongs to the technical field of mechanical design, and comprises the following steps: realizing parametric geometric modeling of a crane girder in three-dimensional modeling software; automatically importing a geometric model output by the three-dimensional design software into finite element pretreatment software, and carrying out modeling pretreatment on the geometric model to establish a parameterized finite element simulation model of the crane girder; performing pretreatment and solution calculation on finite element simulation analysis of the girder structure of the parameterized finite element simulation model; based on DOE analysis of finite elements, an approximate proxy model of the parameterized finite element simulation model is established; and on the basis of the parameterized finite element simulation model by using an optimization algorithm, aiming at the approximate proxy model, perfo