Finite Element Analysis for a Two-Layered Spherical High-Pressure Vessel

Stress analysis is of importance for security assessment of pressure vessels in the design and manufacture processes. This paper presents a stress analysis for a two-layered spherical high-pressure vessel of special steel. Firstly, the finite element model was built by the software ANSYS. In order to get an acceptable analysis precision, the proper mesh density distribution was obtained by the adaptive meshing technique. Then the stress distribution analysis was performed and the potential weak zones and the explosion pressure were found. Furthermore, several redesign schemes were analyzed. The results provide a good suggestion for its redesign.