eprintid: 12434
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/24/34
datestamp: 2023-11-10 03:26:59
lastmod: 2023-11-10 03:26:59
status_changed: 2023-11-10 01:48:46
type: article
metadata_visibility: show
creators_name: Lekkala, M.R.
creators_name: Mohamed, L.
creators_name: Hafiz, M.F.U.
creators_name: Kim, D.K.
title: A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
ispublished: pub
keywords: Buoyancy; Database systems; Fatigue of materials; Fluid structure interaction; Forecasting; Lift; Petroleum prospecting; Reynolds number; Sailing vessels; Vibrations (mechanical); Vortex flow, Excitation coefficients; Hydrodynamic coefficients; Hydrodynamic excitation; Laboratory conditions; Reynolds number flows; Shell exploration and productions; Theoretical estimation; Vortex-induced vibration, Hydrodynamics, buoyancy; fatigue; hydrodynamics; induced response; Reynolds number; riser; vibration; vortex
note: cited By 10
abstract: The hydrodynamic coefficients in semi-empirical tool are optimized for a riser attached with staggered buoyancy modules undergoing Vortex-Induced Vibration (VIV) based on the SHELL Oil Experiment. The existing prediction tools are based on data derived from experiments, number of assumptions from strip theory, energy balance between fluid and structure and use of lift coefficient databases. Current advancements in conducting and calculating VIV response from the experiments shows that these assumptions may be invalid. The major difference arises between experimental observations and theoretical estimations is from lift coefficient databases. The databases extracted under laboratory conditions have limited Reynolds number flow conditions and only cross-flow motions were considered. The extracted hydrodynamic excitation coefficient database is posed to optimization problem, where the main objective is to minimize the prediction error of semi-empirical tools when compared with experimental results. We optimize the existing excitation coefficient database to improve the fatigue damage prediction of riser attached with staggered buoyancy modules. Application of modification factors and optimizing the hydrodynamic lift coefficients to the data from SHELL Exploration and Production Test provides the new optimized excitation coefficient datasets which reduce the error in the predicting the VIV response of the riser with staggered buoyancy modules. © 2020 Elsevier Ltd
date: 2020
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089955966&doi=10.1016%2fj.oceaneng.2020.107760&partnerID=40&md5=13bf9429e8f34e56e77902b6c3fac31c
id_number: 10.1016/j.oceaneng.2020.107760
full_text_status: none
publication: Ocean Engineering
volume: 217
refereed: TRUE
issn: 00298018
citation:   Lekkala, M.R. and Mohamed, L. and Hafiz, M.F.U. and Kim, D.K.  (2020) A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration.  Ocean Engineering, 217.   ISSN 00298018