Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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The Evaluation of Strength for the Corner Block Structure in the LNG Tank using Sloshing Pressure of the Scaled Tank

모형수조 슬로싱 하중을 이용한 LNG 탱크 코너블럭(Corner Block) 구조물의 구조강도 평가

  • 박준형 (브이피코리아(주) 응용기술팀) ;
  • 박시종 (브이피코리아(주) 응용기술팀) ;
  • 김성훈 (브이피코리아(주) 응용기술팀) ;
  • 최재민 (브이피코리아(주) 응용기술팀) ;
  • 전인기 (브이피코리아(주) 응용기술팀)
  • Received : 2013.03.26
  • Accepted : 2013.07.05
  • Published : 2013.10.31
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Abstract

The purpose of this study is to predict sloshing pressure of a actual tank by using measured pressure in scaled down tank and to evaluate with structural strength of LNG Corner Block. For this purpose, we performed sloshing analysis about 138K class tank by using Ansys CFX program, and were measured both average pressure and maximum peak pressure according to scaled tank ratio. Also, measured pressure was converted to pressure of the actual tank by Froude scale law, and we conducted the evaluation of structural strength about the conner block of actual size KC-1.

이 연구의 목적은 축소된 탱크 모델에서 측정되어진 슬로싱 압력을 이용하여 실제 크기의 탱크 모델에서의 압력을 예측하는 것이며, 또한 예측된 압력으로 LNG 코너 블럭의 슬로싱 하중에 의한 구조 강도를 평가하는 것이다. 이 목적을 위하여, Ansys CFX 프로그램을 이용하여 138K급 LNG 화물창 시스템의 크기 비율에 따른 슬로싱 해석을 수행 하였으며, 크기 비율에 따른 슬로싱 평균 압력 및 최대 피크 압력을 측정하였다. 또한, 측정된 압력은 프루드 법칙에 의해 실제 138K 크기의 압력으로 변환하여 실선 크기의 KC-1 코너블럭에 대한 구조강도 평가를 수행하였다.

Keywords

References

  1. ABS. (2006) Strength Assessment of Membrane-type LNG Containment System under Sloshing Loads.
  2. Bass, R.L. (1985) Modeling Criteria for Scaled Lng Sloshing Experiments, Journal of Fluids Engineering, 107, pp.272-280. https://doi.org/10.1115/1.3242473
  3. Choi, S.W. (2011) Thermal Analysis of Two Main Ccs(Cargo Containment System) Insulation Box by using Experimental Thermal Properties, Computational Structural Engineering Institute of Korea, 24, pp.429-438.
  4. DNV. (2006) Classification Notes No. 30.9.
  5. Jeon, S.S. (2008) Experimental Investigation of Scale Effect in Sloshing Phenomenon, 27th Symposium on Naval Hydrodynamics, 2, pp.1165-1177.
  6. Lee, D.H. (2007) A Parametric Sensitivity Study on Lng Tank Sloshing Loads by Numerical Simulations, Ocean Engineering, 34, pp.3-9. https://doi.org/10.1016/j.oceaneng.2006.03.014
  7. Lee, J.M. (2011) Evaluation of Sloshing Resistance Performance of LNG Carrier Insulation System by Fluid-Structure Interaction Analysis, Computational Structural Engineering Institute of Korea.
  8. Lee, S.G. (2011) Local Zooming Analysis of LNGC CCS under Sloshing Impact Loading, Computational Structural Engineering Institute of Korea.
  9. Shin, J.R. (2005) An Analytic Solution to Sloshing Natural Periods for a prismatic Liquid Cargo Tank with Baffles, The Korean Society of Ocean Engineers, 19, pp.16-21.