CAJ | 학술논문

分析船体板在循环面内载荷下的极限强度特性，是开展船体梁循环弯曲下极限强度研究的基础工作，对于保障船舶的总纵强度安全具有重要意义。文中采用7个系列方柱模型模拟船体板构件，对其在轴向循环压缩下的极限强度进行了实验研究，并运用非线性有限元方法对实验模型进行了数值分析。研究表明，船体板一次性崩溃压缩极限强度是循环压缩载荷下船体板极限强度的最大值，基于一次性崩溃方法的船体梁极限强度的评估实际上可能偏于危险。该文所获结论对理解及进一步探讨船体梁在实际海洋环境的循环弯曲载荷下的极限强度有重要意义。
분석선체판재순배면내재하하적겁한강도특성，시개전선체량순배만곡하겁한강도연구적기출공작，대우보장선박적총종강도안전구유중요의의。문중채용7개계렬방주모형모의선체판구건，대기재축향순배압축하적겁한강도진행료실험연구，병운용비선성유한원방법대실험모형진행료수치분석。연구표명，선체판일차성붕궤압축겁한강도시순배압축재하하선체판겁한강도적최대치，기우일차성붕궤방법적선체량겁한강도적평고실제상가능편우위험。해문소획결론대리해급진일보탐토선체량재실제해양배경적순배만곡재하하적겁한강도유중요의의。
Research on the ultimate strength behavior of ship plates under longitudinal cyclic loads is one of the basic works when studying on the hull girder’s ultimate strength under cyclic bending loads, which is meaningful to guarantee the longitudinal strength safety of ship hulls. In this paper, a series of tests to the seven square column models is carried out to simulate the ultimate strengths of ship plates under the loads of cyclic axial compression. In addition, it conducts numerical analy-sis to these models by the nonlinear finite element analysis. The studied results indicate that ship plate’s compressive ultimate strength based on one-time collapse is the maximum of ship plates’ ul-timate strength under the load of cyclic axial compression; therefore, the assessment criteria of hull girder’s ultimate strength based on one-time collapse may overestimate the load bearing capability of actual ship hull structures. The conclusions in this paper are significant to understand the hull girder’s ultimate strength under the cyclic loads and impel further study on this subject.