복합재 압력용기의 스커트 치수 최적화 설계 연구

Abstract

Key Words: Composite Pressure Vessel(복합재압력용기), Optimum Design(최적설계), Size Optimization(치수최적화), Sub-problem Approximation Method(부분문제근사법), Skirt Structure(스커트구조물)초록: 본연구의목적은최적화해석기법을이용하여복합재압력용기의스커트치수를도출하는것이다. 복합재압력용기스커트최적화해석은부분문제근사법을사용하였으며, APDL(ANSYS ParametricDesign Language)을이용하여해석의모든과정을일괄처리하였다. 설계변수로는압력용기스커트부위의두께와길이를선정하였으며, 내압에의해발생하는변위와무게를각각목적함수로하여최적화해석을통해최적의스커트치수를도출하였다. 그결과복합재압력용기의스커트무게를최대4.38% 절감할수있었다.Abstract: This study aims to find the optimal skirt dimensions for a composite pressure vessel with aseparated dome part. The size optimization for the skirt structure of the composite pressure vessel wasconducted using a sub-problem approximation method and batch processing codes programmed using ANSYSParametric Design Language (APDL). The thickness and length of the skirt part were selected as designvariables for the optimum analysis. The objective function and constraints were chosen as the weight and thedisplacement of the skirt part, respectively. The numerical results showed that the weight of the skirt of acomposite pressure vessel with a separated dome part could be reduced by a maximum of 4.38% throughsize optimization analysis of the skirt structure.