Wet Drop Impact Response Analysis of CCS in Membrane Type LNG Carriers -II : Consideration of Effects on Impact Response Behaviors-

Lee, Sang-Gab; Hwang, Jeong-Oh; Kim, Wha-Soo

doi:10.3744/snak.2008.45.6.735

Journal of the Society of Naval Architects of Korea

2008

DOI: 10.3744/snak.2008.45.6.735

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Wet Drop Impact Response Analysis of CCS in Membrane Type LNG Carriers -II : Consideration of Effects on Impact Response Behaviors-

Sang-Gab Lee¹,

Jeong-Oh Hwang²,

Wha-Soo Kim³

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Cited by 4 publications

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Estimation of Acceleration Response of Freefall Lifeboat using FSI Analysis Technique of LS-DYNA Code

Bae¹,

Zakki²,

Kim³

et al. 2010

Journal of the Society of Naval Architects of Korea

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During certification of freefall lifeboats, it is necessary to estimate the injury potential of the impact loads exerted on the occupants during water entry. This paper focused on the numerical simulation to predict the acceleration response during the impact of freefall lifeboats on the water using FSI(Fluid-Structure Interaction) analysis technique of LS-DYNA code. FSI problems could be conveniently simulated by the overlapping capability using Arbitrary Lagrangian Eulerian(ALE) formulation and Euler-Lagrange coupling algorithm of LS-DYNA code. Through this study, it could be found that simulation results were in relatively good agreement with experimental ones in the acceleration peak values, and that the loading conditions were very sensitive to the acceleration responses by the experimental and simulation results.

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Estimation of Acceleration Response of Freefall Lifeboat using FSI Analysis Technique of LS-DYNA Code

Bae¹,

Zakki²,

Kim³

et al. 2010

Journal of the Society of Naval Architects of Korea

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Comparisons of Multi Material ALE and Single Material ALE in LS-DYNA for Estimation of Acceleration Response of Free-fall Lifeboat

Bae¹,

Zakki²

2011

Journal of the Society of Naval Architects of Korea

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An interest in Arbitrary Lagrangian Eulerian (ALE) finite element methods has been increased due to more accurate responses in Fluid-Structure Interaction(FSI) problems. The multi-material ALE approach was applied to the prediction of the acceleration response of free-fall lifeboat, and its responses were compared to those of the single-material ALE one. It could be found that even though there was no big difference in the simulation responses of two methods, the single-material and multi-material ALE ones, the latter multi-material ALE method showed a little bit more close response to those of experimental results compared to the former single-material ALE one, especially in the x-and z-direction acceleration responses. Through this study, it could be found that several parameters in the ALE algorithms have to be examined more carefully for a good structural safety assessment of FSI problems.

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Strength Assessment of LNG CCS using Strength Analysis Method for Composite Materials

Jeong¹,

Yang²

2014

Journal of the Society of Naval Architects of Korea

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2This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.Liquefied natural gas(LNG) cargo containment system(CCS) has the primary function of ensuring both adequate structural safety with respect to sloshing load which is defined as a violent behaviour of the liquid contents in CCS due to external forced motions and thermal insulation keeping natural gas below its boiling point. Among different LNG CCS types such as independent B-type and membrane ones, Mark III CCS is considered in this paper to perform its strength assessment. Mark III CCS plate is designed and constructed by stacking various non-metallic engineering materials such as plywood, triplex, reinforced PU foam that are supported by series of mastic upon inner steel hull structure. From the viewpoint of structural analysis, this plated structure is treated as a laminated composite structure showing complex structural behaviour under external load. Advanced finite element models of Mark III CCS plate is generated and used in conjunction with ultimate strength based failure criteria from laminated composite mechanics for the strength assessment. The strength assessment is performed within the initial failure state of Mark III CCS plate. Results provide failure details such as failure locations and loads. Finally obtained results are reviewed using the loads from acceptance criteria suggested by classification.

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Wet Drop Impact Response Analysis of CCS in Membrane Type LNG Carriers -II : Consideration of Effects on Impact Response Behaviors-

Cited by 4 publications

References 1 publication

Estimation of Acceleration Response of Freefall Lifeboat using FSI Analysis Technique of LS-DYNA Code

Estimation of Acceleration Response of Freefall Lifeboat using FSI Analysis Technique of LS-DYNA Code

Comparisons of Multi Material ALE and Single Material ALE in LS-DYNA for Estimation of Acceleration Response of Free-fall Lifeboat

Strength Assessment of LNG CCS using Strength Analysis Method for Composite Materials

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