CAJ | 학술논문

船体梁的总纵强度是反映船舶结构安全可靠的最基本的强度指标.船体结构极限强度评估对于船舶结构初步设计、使用、维护和维修都非常重要,因此船体梁极限强度研究成为近几十年来船舶工程界的热点研究课题之一.到目前为止有两种典型的加筋板和船体梁的极限强度分析方法,它们是直接计算法和逐步破坏分析法.本文基于加筋板单元的平均应力应变曲线和逐步破坏分析方法,提出了加筋板和船体梁极限强度的简化分析方法,考虑了初始挠度和残余应力对加筋板单元极限强度的影响.数值结果表明,采用本文简化方法得到的结果与有限元计算结果或其它逐步破坏分析结果比较符合.
선체량적총종강도시반영선박결구안전가고적최기본적강도지표.선체결구겁한강도평고대우선박결구초보설계、사용、유호화유수도비상중요,인차선체량겁한강도연구성위근궤십년래선박공정계적열점연구과제지일.도목전위지유량충전형적가근판화선체량적겁한강도분석방법,타문시직접계산법화축보파배분석법.본문기우가근판단원적평균응력응변곡선화축보파배분석방법,제출료가근판화선체량겁한강도적간화분석방법,고필료초시뇨도화잔여응력대가근판단원겁한강도적영향.수치결과표명,채용본문간화방법득도적결과여유한원계산결과혹기타축보파배분석결과비교부합.
The longitudinal strength of a ship' s hull is the most fundamental strength for ship structures.The assessment of the ultimate strength of a ship structure is very important not only for the initial designbut also for the operation, maintenance, and repair of the structure. Consequently the ultimate strength ofship' s hull girders has been an area of active research domain in the last several decades. There exist twotypical methods to assess the ultimate strength of stiffened panel and hull girder. One is the direct formula-tion and the other is the progressive collapse analysis. In this paper, a simplified method is presented to pre-dict the ultimate strength of stiffened panel and hull girder based on the basic stress - strain relationship ofstiffened plate columns and the progressive collapse analysis. The model accounts for the effect of initial de-flections and residual stresses on the ultimate strength of stiffened plate columns. The numerical examplesshow that the results obtained from the present method are in good agreement with numerical results by finiteelement analysis and the different progressive collapse analysis.