Design of main frame of tunnel lining trestle with multivariate response model

The main frame of the key equipment trestle in the tunnel lining rapid construction complete set process is the research object. Taking the main frame structure optimization and light mass of the trestle as the research goal, the Central Composite Design test design method is used under the conditions of using the structural strength and stiffness. The primaries of the multi-structure size parameters are subjected to sensitivity analysis, and the sizes that have large influence on the structure mass, the maximum deformation, and the maximum equivalent stress are selected as the final design variables. The response surface model between the design variables and the optimization targets is established, and the global optimal solution of the design variables is solved by the MOGA algorithm. The analysis results show that the optimized structural section parameters meet the requirements of tunnel rapid lining construction, and the mass is reduced by 7.9%. (paper)