내압용기 연결부의 구조적 효과와 전체좌굴에 관한 연구

Abstract

Generally, pressure vessels for the deep-sea system consist of a cylinder in the middle, and two flat plates at both ends. The cylinder and the both ends are connected by welding or bolting, and the ultimate collapse points are usually near the connected part while initial plastic deformation occurs in the form of buckling in the cylindrical part. Therefore, in order to evaluate the structural safety of the pressure vessel, it is necessary to consider the failure of the connection part as an important factor, together with the cylindrical part in the middle and both ends, where the initial large deflection occurs. In this paper, local structural analysis for the pressure vessel considering the bolted part was carried out as well as global buckling analysis. Finally, the results were verified and investigated by pressure tests in the hyperbaric chamber of KRISO.