유공판의 좌굴강도에 관한 연구

• Published in: 大韓造船學會 論文集 Vol. 47; no. 2; pp. 210 - 224
• Main Authors: 김을년(Ul Nyeon Kim), 최익흥(Ick Heung Choe), 권진칠(Jin Chil Kwon), 백점기(Jeom Kee Paik)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2010
• Subjects: 조선공학; Perforated plate(유공판); Buckling strength(좌굴강도); Design formula(설계식); Ship structure(선체); Perforated stiffened panel(유공보강판)
• ISSN: 1225-1143; 2287-7355

The aim of the present study is to investigate the buckling strength of plates and stiffened panels with opening under transverse thrust and shear actions. It is observed that the existing design formulation for critical-buckling strength of plates are not valid for perforated plates, because the current design formulation trends can significantly overestimate or underestimate the load-carrying capacity of plates when plates have large opening and/or are thick. A series of eigen value and elastic.plastic large deflection finite element analyses are carried out with varying the aspect ratio of plate, the opening size and location on plate until and after the ultimate strength is reached. Based on the results obtained from the present study, closed-form design formulations for the elastic buckling strength of plates and stiffened panels with opening are derived. The derived design formulations are considered plasticity correction of the material and verified by experimental tests and results of nonlinear finite element computations.