Hull-form optimization of KSUEZMAX to enhance resistance performance
1
조회
0
다운로드
7
인용
0
참고문헌
키워드
초록
This paper deploys optimization techniques to obtain the optimum hull form of KSUEZMAX at the conditions of full-load draft and design speed. The processes have been carried out using a RaPID-HOP program. The bow and the stern hull-forms are optimized separately without altering neither, and the resulting versions of the two are then combined. Objective functions are the minimum values of wave-making and viscous pressure resistance coefficients for the bow and stern. Parametric modification functions for the bow hull-form variation are SAC shape, section shape (U-V type, DLWL type), bulb shape (bulb height and size); and those for the stern are SAC and section shape (U-V type, DLWL type). WAVIS version 1.3 code is used for the potential and the viscous-flow solver. Prior to the optimization, a parametric study has been conducted to observe the effects of design parameters on the objective functions. SQP has been applied for the optimization algorithm. The model tests have been conducted at a towing tank to evaluate the resistance performance of the optimized hull-form. It has been noted that the optimized hull-form brings 2.4% and 6.8% reduction in total and residual resistance coefficients compared to those of the original hull-form. The propulsive efficiency increases by 2.0% and the delivered power is reduced 3.7%, whereas the propeller rotating speed increases slightly by 0.41 rpm.
Abstract
This paper deploys optimization techniques to obtain the optimum hull form of KSUEZMAX at the conditions of full-load draft and design speed. The processes have been carried out using a RaPID-HOP program. The bow and the stern hull-forms are optimized separately without altering neither, and the resulting versions of the two are then combined. Objective functions are the minimum values of wave-making and viscous pressure resistance coefficients for the bow and stern. Parametric modification functions for the bow hull-form variation are SAC shape, section shape (U-V type, DLWL type), bulb shape (bulb height and size); and those for the stern are SAC and section shape (U-V type, DLWL type). WAVIS version 1.3 code is used for the potential and the viscous-flow solver. Prior to the optimization, a parametric study has been conducted to observe the effects of design parameters on the objective functions. SQP has been applied for the optimization algorithm. The model tests have been conducted at a towing tank to evaluate the resistance performance of the optimized hull-form. It has been noted that the optimized hull-form brings 2.4% and 6.8% reduction in total and residual resistance coefficients compared to those of the original hull-form. The propulsive efficiency increases by 2.0% and the delivered power is reduced 3.7%, whereas the propeller rotating speed increases slightly by 0.41 rpm.
참고문헌 (34)
- Chen, P. F., "An inverse design approach in determining the optimal shape of bulbous bow with experimental verification", Journal of Ship Research, 50(1), pp.1~14 (2006)
- 최희종, "최적선형개발에 대한 기초연구", 한국해양공학회지, 18(3), pp.32~39 (2004), 한국해양공학회
- 최희종, "Panel cutting method: new approach to generate panels on a hull in Rankine source potential approximation", International Journal of Naval Architecture and Ocean Engineering, 3(4), pp.225~232 (2011), 대한조선학회
- 최희종, "최소 조파저항을 가지는 컨테이너선의 선형최적화 기법에 대한 연구", 대한조선학회 논문집, 40(4), pp.2~15 (2003), 대한조선학회
- 최희종, "종모양 분포 변환함수를 이용한 선형최적화 기법에 관한 연구", 대한조선학회 논문집, 43(5), pp.550~559 (2006), 대한조선학회
- Choi, J. E., "Resistance and propulsion characteristics of various commercial ships based on CFD results", Ocean Engineering, 37(7), pp.549~566 (2010)
- Dejhalla, R., "A genetic algorithm approach to the problem of minimum ship wave resistance", Marine Technology, 39(3), pp.187~195 (2002)
- Duvigneau, R., "On the pole played by turbulence closures in hull shape optimization at model and full scale", Journal of Marine Science and Technology, 8(1), pp.11~25 (2003)
- Han, S. H., "Hydrodynamic hull form optimization using parametric models", Journal of Marine Science and Technology, 17, pp.1~17 (2012)
- Harries, S., "From redesign to optimal hull line by means of parametric modeling", 2nd International Conference on Computer Applications and Information Technology in the Maritime Industries(COMPIT 2003), Hamburg, Germany (2003)
- Jacpuin, E., "Hull form optimization using a free surface RANSE solver", 25thSymposium on Naval Hydrodynamics. Newfoundland, Canada (2004)
- Kim, H. J., "Parametric modification function based multiobjective optimization for ship design", 박사, pp.2008
- Kim, H. J., "A combined local and global hull form modification approach for hydrodynamic optimization", 28th Symposium on Naval Hydrodynamics. California Institute of Technology in Pasadena, U.S.A (2010)
- Kim, H. J., "Hull form generation of minimum wave resistance by a nonlinear optimization method", Journal of the Society of Naval Architects of Korea, 37(4), pp.11~18 (2000)
- 이주성, "장력법을 이용한 필릿용접변형의 감소에 관한 연구", 대한조선학회 논문집, 44(6), pp.590~597 (2007), 대한조선학회
- 김희정, "CFD를 이용한 선미선형 최적화 기법 개발", 대한조선학회 논문집, 44(6), pp.564~571 (2007), 대한조선학회
- 김희정, "전역 최적화기법과 파라메트릭 변환함수를 이용한 선형 최적화", 대한조선학회 논문집, 45(6), pp.590~600 (2008), 대한조선학회
- 김진, "Comparison of potential and viscous methods for the nonlinear ship wave problem", International Journal of Naval Architecture and Ocean Engineering, 3(3), pp.159~173 (2011), 대한조선학회
- Kim, W, . J. Kim, D. H., "Computational study on turbulent flows around modern tanker hull forms", International Journal for Numerical Methods in Fluids, 38(4), pp.377~406 (2002)
- Kim, W. J., "Comparisons of turbulent flows around two modern VLCC hull forms", Proceedings workshop on Numerical Ship Hydrodynamics : Gothenburg 2000, Gothenburg, Sweden (2000)
- Lackenby, H., "On the systematic geometrical variation of ship forms", Transactions of RINA, 92, pp.289~316 (1950)
- Lowe, T. W., "Conceptual hull design using a genetic algorithm", Journal of Ship Research, 47, pp.222~236 (2003)
- Min, K. S., "Study on the CFD application for VLCC hull-form design", Proceedings of the 23rd ONR Symposium on Naval Hydrodynamics. Val de Reuil, France (2002)
- Nowachi, H., "Hull form variation and evaluation", Journal of the Kansai Society of Naval Architects, 219, pp.173~184 (1993)
- Peri, D., "High-fidelity models and multiobjective global optimization algorithms in simulationbased design", Journal of Ship Research, 49(3), pp.159~175 (2005)
- Pinto, A., "Multiobjective optimization of a containership using deterministic particle swarm optimization", Journal of Ship Research, 51(3), pp.217~228 (2007)
- Ragab, S. A., "An adjoint formulation for shape optimization in free-surface potential flow", Journal of Ship Research, 45, pp.269~278 (2001)
- Rao, S. S., "Engineering optimization : theory and practice. 3rd Ed" (1999), Wiley-Interscience
- Saha, G. K., "Hydrodynamic optimization of ship hull forms in shallow water", Journal of Marine Science and Technology, 9, pp.51~62 (2004)
- Softley, J., "An approach to advanced ship design using parametric design templates", Transactions-Society of Naval Architects and Marine Engineers, 110, pp.245~258 (2002)
- Suzuki, K., "Hydrodynamic optimization of ship hull forms in shallow water", Journal of Marine Science and Technology, 21(2), pp.277~284 (2004)
- Tahara, Y., "Computational fluid dynamics-based optimization of surface combatant", Journal of Ship Research, 48(4), pp.273~287 (2004)
- Tahara, Y., "CFD-based multi-objective optimization method for ship design", International Journal for Numerical Methods in Fluid, 52(5), pp.499~527 (2006)
- Tahara, Y., "Computational fluid dynamics-based multi-objective optimization of a surface combatant using a global optimization method", Journal of Marine Science and Technology, 13(2), pp.95~116 (2008)