Nonlinear Buckling Characteristics of Ring-stiffened Circular Cylinders under Uniform External Pressure

균일한 외압을 받는 원환보강 원통구조의 비선형 좌굴 특성

  • Received : 2012.03.02
  • Accepted : 2012.04.19
  • Published : 2012.04.30


This study aimed to analyze the nonlinear buckling of ring-stiffened circular cylinders under uniform external pressure, e.g. hydrostatic pressure, considering material nonlinearity and initial imperfection. In the present study, we analyzed the collapse pressure of pressure vessels using ANSYS Workbench, which is a framework of finite element methods. First, linear buckling analysis is performed to find collapse modes of the model. Second, scaling the first mode shape with small factor, geometric model is pre-deformed. And then, by analyzing the nonlinear buckling of the pre-deformed shape, the collapse pressure is estimated. To verify the validity of the analyses, we compared the results with Ross' experimental results. Finally, we applied it to ring-stiffened circular cylindrical shell of the pressure hull of a small submarine.


Ring-stiffened circular cylinder;Nonlinear buckling analysis;Pressure vessel;Shell yielding;Shell buckling;Overall buckling


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