멤브레인형 LNG선 화물창 단열시스템의 수면낙하 내충격 응답해석 Ⅰ: 검증을 통한 수치해석 기법 개발
Wet Drop Impact Response Analysis of CCS in Membrane Type LNG Carriers Ⅰ: Development of Numerical Simulation Analysis Technique through Validation
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초록
While the structural safety assessment of Cargo Containment System(CCS) in membrane type LNG carriers has to be carried out in consideration of sloshing impact pressure, it is very difficult to figure out its dynamic response behaviors due to its very complex structural arrangements/materials and complicated phenomena of sloshing impact loading. For the development of its original technique, it is necessary to understand the characteristics of dynamic response behavior of CCS structure under sloshing impact pressure. In this study, for the exact understanding of dynamic response behavior of CCS structure in membrane Mark III type LNG carriers under sloshing impact pressure, its wet drop impact response analyses were carried out by using Fluid-Structure Interaction(FSI) analysis technique of LS-DYNA code, and were also validated through a series of wet drop experiments for the enhancement of more accurate shock response analysis technique. It might be thought that the structural response behaviors of impact response analysis, such as impact pressure impulses and resulted strain time histories, generally showed very good agreement with experimental ones with very appropriate use of FSI analysis technique of LS-DYNA code, finite element modeling and material properties of CCS structure, finite element modeling and equation of state(EOS) of fluid domain.
Abstract
While the structural safety assessment of Cargo Containment System(CCS) in membrane type LNG carriers has to be carried out in consideration of sloshing impact pressure, it is very difficult to figure out its dynamic response behaviors due to its very complex structural arrangements/materials and complicated phenomena of sloshing impact loading. For the development of its original technique, it is necessary to understand the characteristics of dynamic response behavior of CCS structure under sloshing impact pressure. In this study, for the exact understanding of dynamic response behavior of CCS structure in membrane Mark III type LNG carriers under sloshing impact pressure, its wet drop impact response analyses were carried out by using Fluid-Structure Interaction(FSI) analysis technique of LS-DYNA code, and were also validated through a series of wet drop experiments for the enhancement of more accurate shock response analysis technique. It might be thought that the structural response behaviors of impact response analysis, such as impact pressure impulses and resulted strain time histories, generally showed very good agreement with experimental ones with very appropriate use of FSI analysis technique of LS-DYNA code, finite element modeling and material properties of CCS structure, finite element modeling and equation of state(EOS) of fluid domain.
참고문헌 (8)
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- Chung, J.Y, "Wet Drop Test for LNG Insulation System", Proceedings of ISOPE, 통권 : 3, pp.199~204 (2006)
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- Kim, W.S, "Fluid-structure interaction modeling, relating to membrane LNG ship cargo containment system", Proceedings of ISOPE, 통권 : 3, pp.75~84 (2008)
- Lee, S.G, "Fluid-Structure Interaction Respons Analysis using LS-DYNA3D", Proceedings of the Spring Meeting KAOST, pp.997~1001 (2006)
- Lee, S.G, "Fluid-Structure Interaction Respons Analysis using LS-DYNA3D II", Proceedings of the Annual Autumn Meeting SNAK, pp.503~538 (2006)
- LSTC, "LS-DYNA User's Manual, Version 971" (2007), Livermore Soft Technology Corp.
- DYTRAN User's Guide, Version 2002, "MSC", pp.2002, MSC