Collapse Behaviour based on Pareto Optimization of Multi-objective Grillage System
Stiffened steel plates are basic structural members on the deck and bottom structure in ship,offshore.It has a number of one sided stiffeners in either one or both directions,the latter structure was called grillage structure.At the ship structural design stage,one of the major considerations is evaluation for buckling strength as well as ultimate strength of the hull girder.In general,it is accepted that hull girder strength can be represented by the local strength of the longitudinal stiffened panel.To be considered hogging condition in a stormy sea condition,stiffened panel of the bottom structures acting on axial compression induced hull girder bending moment,also simultaneously arising local bending moment induced lateral pressure.In the present paper,results of the structural analysis have been compared with another detailed FEA program and prediction from design guideline and elastoplastic large deflection analysis was conducted consideration of optimum model by simulated Multi-objective genetic algorithm under combined lateral pressure load and axial compression.It has been found that application of Multi-objective genetic algorithm based on finite element analysis is capable of predicting the collapse behavior and ultimate load capacity of a simply supported grillage system subjected to combined axial compression and lateral pressure.It is expected that these results will be used to examine the effect of interaction between lateral pressure and axial loads for the ultimate loadcarrying capacity based on the Ultimate Limit State design guideline.
Grillage Combined load Hull girder bending moment Ultimate limit state design Buckling capacity Pareto optimization
Joo-Shin Park Yunyoung Kim
Department of Naval Architecture & Ocean Engineering,Osaka University,JAPAN Department of Naval Architecture & Ocean Engineering,Mokpo National Maritime University,KOREA
国际会议
International Conference on Modelling,Identification and Control(模拟、鉴定、控制国际会议)
上海
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）