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수치 민감도 해석을 통한 파랑중 FPSO운동 시뮬레이션Motion Simulation of FPSO in Waves through Numerical Sensitivity Analysis
- Other Titles
- Motion Simulation of FPSO in Waves through Numerical Sensitivity Analysis
- Issue Date
- 2018
- Publisher
- 한국해양공학회
- Keywords
- Wave propagation 파진행; Motion 운동; CFD 전산유체역학; Numerical sensitivity 수치 민감도; Error distribution 오차분포
- Citation
- 한국해양공학회지, v.32, no.3, pp 166 - 176
- Pages
- 11
- Journal Title
- 한국해양공학회지
- Volume
- 32
- Number
- 3
- Start Page
- 166
- End Page
- 176
- ISSN
- 1225-0767
2287-6715
- Abstract
- This paper presents a numerical sensitivity analysis for the simulation of the motion performance of an offshore structure in waves using computational fluid dynamics (CFD). Starting with 2D wave simulations with varying numerical parameters such as grid spacing and CFL value, proper numerical conditions were found for accurate wave propagation that avoids numerical diffusion problems. These results were mapped on 2D error distributions of wave amplitude and wave length against the numbers of grids per wave length and per wave height under a given CFL condition. Finally, the 2D numerical sensitivity result was validated through CFD simulation of the motion of a FPSO in waves showing good accuracy in motion RAOs compared with existing potential flow solutions.
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