• Title/Summary/Keyword: 유체-구조물 상호 연계

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Transient Response Analysis of Cylindrical Liquid Fuel-Storage Tank subject to Initial Acceleration (원통형 액체 연료탱크의 초기 가속에 따른 과도응답 해석)

  • Lee, S.Y.;Joo, Y.S.;Kim, K.W.;Cho, J.R.
    • Proceedings of the KSME Conference
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    • 2000.11a
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    • pp.475-480
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    • 2000
  • The transient dynamic-response analysis of fuel-storage tanks of flying vehicles accelerating in the vertical direction is achieved with finite element method. A fuel-storage tank is a representative example of the fluid-structure interaction problem, in which structure and fluid media interact strongly. For the accurate analysis of this complicated fluid-structure system, we employed ALE(arbitrary Lagrangian-Eulerian) coupling method. Two types of fuel-storage tanks, one with two baffles and the other without baffle, are considered to examine the effect of baffles. The fuel-storage tank with baffles shows more uniform hydrodynamic pressure distribution, resulting effective stress in structural region and faster convergence from transient to steady states. MSC/Dytran, a commercial FEM software for the 3D coupled dynamic analysis, is used for this analysis.

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Study on Hydroelastic Analysis of LNGC Cargo by Global-Local Analysis Technique (전역-국부 해석기법에 의한 LNG 운반선 화물창의 유탄성 해석에 관한 연구)

  • Park, Seong-Woo;Cho, Jin-Rae
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.20 no.1
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    • pp.83-92
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    • 2007
  • There are many numerical methods to solve large-scale fluid-structure interaction(FSI) problems. However, these methods require very fine mesh to achieve the reasonable numerical accuracy and stability due to the concentrated and volatile hydrodynamic pressure caused by the liquid sloshing. Consequently, the numerical analysis targeting for the long-period time response with the desired numerical accuracy Is very highly time-consuming. The aim of this paper is to suggest a new method to analyze the hydroelastic behavior of the LNGC containment by using the global-local numerical approach. The reliability of the presented method is firstly examined, and then its efficiency is demonstrated by presenting that the long-period local responses of the LNGC containment are obtained with relatively short CPU time.