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A Study on the Reinforced Method of Doubler Plate in Ship Hull Structure  

HAM JUH-HYEOK (School of System Applied Engineering, Halla University)
Publication Information
Journal of Ocean Engineering and Technology / v.17, no.5, 2003 , pp. 39-47 More about this Journal
Abstract
A study of the structural strength evaluation on the doubler plate, considering various load cases that were subjected to in-plane and out of plane combined load, has been performed through the systematic evaluation process. In order to estimate the proper static strength of doubler plate for various load cases, elasto-plastic large deflection analysis is introduced, including the contact effect between main plate and doubler. The characteristics of stiffness and strength variation are discussed, based on the results. In order to compare the doubler structure with the original strength of main plate, without doubler, simple formulas for the evaluation of the equivalent flat plate thickness are derived for each load case, respectively, based on the additional series of analysis of flat plate structure. Using these derived equations, the thickness change of an equivalent flat plate is analyzed according to the variation of various design parameters of doubler platesome design guides are suggested in order to maintain the original strength of main plate without doubler reinforcement. Finally, correlation between derived equivalent flat plate formula and the developed buckling strength formulas are discovered, and these relations are formulated for the future development of simple strength evaluation formula of general doubler plate structure.
Keywords
Axial;Biaxial In-plane Compression and Shear In-plane Load 일축;양축 및 전단 면내 압축하중;Lateral Pressure Load 횡 방향 수압하중;Doubler 이중판;Strength Evaluation 강도평가;Elasto-Plastic Analysis 탄소성해석;Buckling Strength 좌굴강도;
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  • Reference
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