Research On Structural Analysis And Optimization Design For 450T Bais-rail Gantry Crane

450T bais-rail gantry crane for high speed railway is taken as the study object in the dissertation, and structural design, intensity analysis and optimization design are studied. The main research contents are as follows:(1)By studying the structure and working situations of the bais-rail girder and according to the design method of Crane Design Manual, the various design parameters of the main girders and legs are ascertained.(2)The model of bais-rail gantry crane is established by using finite element software ANSYS, and static structure intensity analysis and stability analysis are carried out. The static intensity and stability of metal structure are verified and meet the design requirements. Then the modal analysis of gantry crane is made in this paper, the first five natural frequencies and additional vibration mode graphs are gained. These results provide the basis for optimization design.(3)According to the results of finite analysis and mechanical characteristics of girder, the weight of main girders is set as the objective function. Genetic algorithm is used, and the optimal dimensions of the main section are finally obtained by making use of the genetic algorithm toolbox in MATLAB software. The weight of main girders is reduced by 11.8 percent after optimization.(4)A new model is established and calculated again in ANSYS software after rounding the dimensions which are optimized. Comparing the results of optimization with the ones of the original design, it shows that the optimization proposal is reasonable and reliable.The results of the study provide the technical support for the research and development of the gantry crane and reference for the design and optimization for the similar products.