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J. Ocean Eng. Technol. > Volume 26(2); 2012 > Article
J. Ocean Eng. Technol. 2012;26(2):79-84.    
DOI: https://doi.org/10.5574/KSOE.2012.26.2.079   

Nonlinear Buckling Characteristics of Ring-stiffened Circular Cylinders under Uniform External Pressure
Ahn Dang,Kim Soo-Young,Shin Sung-Chul,Chung Bo-Young,Koo Youn-Hoe
Samsung Heavy Industries Co. Ltd.,Department of Naval Architecture & Ocean Engineering Pusan National University,Department of Naval Architecture & Ocean Engineering Pusan National University,Department of Naval Architecture & Ocean Engineering Pusan N
균일한 외압을 받는 원환보강 원통구조의 비선형 좌굴 특성
안당,김수영,신성철,정보영,구윤회
삼성중공업,부산대학교 조선해양공학과,부산대학교 조선해양공학과,부산대학교 조선해양공학과,(주)에이스브이
Copyright © 2012 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: Ring-stiffened circular cylinder, Nonlinear buckling analysis, Pressure vessel, Shell yielding, Shell buckling, Overall buckling
핵심용어: 원환보강 원통구조, 비선형 좌굴 해석, 압력용기, 외판 항복, 외판 좌굴, 전체 좌굴
Abstract
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.


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