Abstract: This paper takes the super large vacuum vessel gate with a diameter of 10m as the research object, the design and analysis of the super large vertical vacuum vessel gate are introduced. The strength and deformation of the gate under external pressure and lifting are simulated and analyzed by using the method of reliability design and simulation optimization, and the stiffener arrangement of the gate is optimized according to the analysis results. The research work shows that the problem of local stress overrun of the gate can be effectively reduced by setting a reinforcing plate between head and stiffener at the place where the curvature changes greatly. Reducing the number of head stiffeners to six can reduce the material consumption. In this case, the maximum stress increases to 97.37MPa and the maximum deformation increases to 4.1mm, which can still meet the material use requirements. When lifting, the whole gate bears the gravity load with the maximum deformation of 0.13mm and the maximum stress of 18.6MPa, which can meet the material use requirements.

Key words: vacuum vessel, gate optimization design, simulation analysis