Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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An Application of Topology Optimization for Strength Design of FPSO Riser Support Structure

FPSO Riser 지지 구조의 강도설계에 대한 위상최적화 응용

  • Song, Chang-Yong (Dep't of Mechanical Engineering, Graduate School, Yonsei University) ;
  • Choung, Joon-Mo (Dep't of Naval Architecture and Ocean Engineering, Inha University) ;
  • Shim, Chun-Sik (Dep't of Naval Architecture and Marine Engineering, Mokpo National University)
  • 송창용 (연세대학교 대학원 기계공학과) ;
  • 정준모 (인하대학교 조선해양공학과) ;
  • 심천식 (국립목포대학교 기계조선해양시스템공학부)
  • Published : 2010.02.28
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Abstract

This paper deals with the topology optimized design of the riser support structures for floating production storage and offloading units (FPSOs) under global and local loading conditions. For a preliminary study and validation of the numerical approach, a simplified plate under static loading is first evaluated with the representative topology optimization methods, the Homogenization Design Method (HDM) and Density Method (DM) or Simple Isotropic Material with Penalization (SIMP). In the context of the corresponding riser support structures, the design problem is formulated such that structure shapes based on design domain variables are determined by minimizing the compliance subject to a mass target, considering the stress criterion. An initial design model is generated based on an actual FPSO riser support configuration. The topology optimization results present improved design performances under various loading conditions, while staying within the allowable limit of the offshore area.

Keywords

References

  1. 나승수, 염재선, 한상민 (2005). "Pareto 최적점 기반 다목적함수기법에 의한 이중선각유조선의 최적구조설계", 대한조선학회논문집, 제42권, 제3호, pp 284-289.
  2. 유정훈 (2001). "자기장에 의한 조화가진을 받는 구조물의 위상 최적화", 대한기계학회논문집, 제25권, 제10호, pp 1613-1620.
  3. 유철호, 이장현, 윤종성 (2007). "선체 곡판의 롤 굽힘 공정 변수 결정을 위한 가공 형상의 최적 근사 알고리즘", 대한조선학회논문집, 제44권, 제5호, pp 517-525.
  4. 이동규, 신수미 (2006). "보-기둥 구조물에서 위상최적화 기법을 이용한 정방형 유공의 최적 위치 산정에 관한 연구", 대한건축학회논문집, 제22권, 제6호, pp 47-54.
  5. 이주성, 한정훈 (2009). "Multi-objective Optimum Structural Design of Marine Structure Considering the Productivity", 한국해양공학회지, 제23권, 제3호, pp 1-5.
  6. 임영석, 민승재, 유정훈, Terada, K., Nishiwaki, S. (2006). "재료 분포의 연속적인 근사를 이용한 위상최적설계 방법의 비교 연구", 대한기계학회논문집 A권, 제30권, 제2호, pp 164-170.
  7. 정태환, 노인식, 이재환, 한승호 (2005). "신뢰성 해석을 이용한 심해용 내압용기의 설계 최적화", 한국해양공학회지, 제19권, 제2호, pp 40-46.
  8. Altair Engineering (2008). Altair OptiStruct User's Guide Version 9.0.
  9. Bendsoe, M.P. (1989). "Optimal Shape Design as a Material Distribution Problem", Structural Optimization, Vol 1, No 4, pp 193-202. https://doi.org/10.1007/BF01650949
  10. Bendsoe, M.P. and Kikuchi, N. (1988). "Generating Optimal Topologies in Structural Design Using a Homogenization Method", Computational Methods in Applied Mechanics and Engineering, Vol 71, pp 197-224. https://doi.org/10.1016/0045-7825(88)90086-2
  11. BV (2007). Rules for the Classification of Offshore Units.
  12. Diaz, A. and Kikuchi, N. (1992). "Solution to Shape and Topology Eigenvalue Optimization Problems Using a Homogenization Method", International Journal for Numerical Methods in Engineering, Vol 35, No 7, pp 1487-1502. https://doi.org/10.1002/nme.1620350707
  13. Larson, U.D., Sigmund, O. and Bouwstra, S. (1997). "Design and Fabrication of Compliant Micromechanisms and Structures with Negative Poisson's Ratio", Journal of Microelectromechanical Systems, Vol 6, No 2, pp 99-106. https://doi.org/10.1109/84.585787
  14. Lotsberg, I. and Landet, E. (2005). "Fatigue Capacity of Side Longitudinals in Floating Structures", Marine Structures, Vol 18, No 1, pp 25–42.
  15. MSC Software (2008). MSC.NASTRAN User's Manual Version 2008.
  16. Neves, M.M., Sigmund, O. and Bendsoe, M.P. (2002). "Topology Optimization of Periodic Microstructures with a Penalization of Highly Localized Buckling Modes", International Journal for Numerical Methods in Engineering, Vol 54, No 6, pp 809-834. https://doi.org/10.1002/nme.449
  17. Ryu, S. and Kim, M.H. (2003). "Coupled Dynamic Analysis of Thruster-Assisted Turret-Moored FPSO", Oceans 2003 MTS/IEEE, San Diego, CA, Vol 3, No 22-26, pp 1613-1620.
  18. Suzuki, K. and Kikuchi, N. (1991). "A Homogenization Method for Shape and Topology Optimization", Computer Methods in Applied Mechanics and Engineering, Vol 93, No 3, pp 291-318. https://doi.org/10.1016/0045-7825(91)90245-2
  19. Xie, Y.M. and Steven, G.P. (1997). Evolutionary Structural Optimization, Springer, New York.
  20. Yoo, J., Kikuchi, N. and Volakis, J.L. (2000). "Structural Optimization in Magnetic Devices by the Homogenization Design Method", IEEE Transactions on Magnetics, Vol 36, No 3, pp 574-580. https://doi.org/10.1109/20.846220