수치 민감도 해석을 통한 파랑중 FPSO운동 시뮬레이션

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 condi...

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Bibliographic Details
Published in:	Han-guk haeyang gonghak hoeji (Online) Vol. 32; no. 3; pp. 166 - 176
Main Authors:	김제인(Je-in Kim), 박일룡(Il-Ryong Park), 서성부(Sung-Bu Suh), 강용덕(Yong-Duck Kang), 홍사영(Sa-Young Hong), 남보우(Bo-Woo Nam)
Format:	Journal Article
Language:	Korean
Published:	한국해양공학회 2018
Subjects:	해양공학 Motion 운동 Numerical sensitivity 수치 민감도 Error distribution 오차분포 Wave propagation 파진행 CFD 전산유체역학
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Summary:	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.
Bibliography:	KISTI1.1003/JNL.JAKO201819352298811
ISSN:	1225-0767 2287-6715
DOI:	10.26748/KSOE.2018.6.32.3.166