Experimental Validation of a Dynamic Mooring Lines Code with Tension and Motion Measurements of a Submerged Chain

Azcona Armendariz, José and Munduate Echarri, Xabier and González Gutiérrez, Leo Miguel and Nygaard, Tor Anders (2017). Experimental Validation of a Dynamic Mooring Lines Code with Tension and Motion Measurements of a Submerged Chain. "Ocean Engineering", v. 129 ; pp. 415-427. ISSN 0029-8018. https://doi.org/10.1016/j.oceaneng.2016.10.051.

Description

Title: Experimental Validation of a Dynamic Mooring Lines Code with Tension and Motion Measurements of a Submerged Chain
Author/s:
  • Azcona Armendariz, José
  • Munduate Echarri, Xabier
  • González Gutiérrez, Leo Miguel
  • Nygaard, Tor Anders
Item Type: Article
Título de Revista/Publicación: Ocean Engineering
Date: January 2017
ISSN: 0029-8018
Volume: 129
Subjects:
Freetext Keywords: Mooring line; Lumped mass; Dynamic; Experiment; Validation; Wave tank
Faculty: E.T.S.I. Navales (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper shows a complete study of the dynamics of a mooring line: first, a simulation code based on a lumped mass formulation was developed and tested under different setups and second, an equivalent experimental campaign was performed to compare against the numerical predictions. The tests consisted of a suspended chain submerged into a water basin, where the suspension point of the chain was excited with horizontal harmonic motions of different periods in the plane of the catenary. The code is able to predict the tension at the suspension point and the motions of the line with accuracy. For those cases where the line loses and subsequently recovers tension, the resulting snap load and motions are well captured with a slight overprediction of the maximum tension. The added mass and drag coefficients for chains used in the computations have been taken from guidelines and, in general, predict correctly the hydrodynamic loads. In addition, sensitivity studies and verification against another code show that highly dynamic cases are sensitive to the seabed-cable contact and friction models. The results show the importance of capturing the evolution of the mooring dynamics for the prediction of the line tension, especially for the high frequency motions.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7308974INNWIND.EUDANMARKS TEKNISKE UNIVERSITETInnovative Wind Conversion Systems (10-20MW) for Offshore Applications
Government of SpainTRA2013-41096-PUnspecifiedUnspecifiedOptimizacion del transporte de gas licuado en buques lng mediante estudios sobre interaccion fluido-estructura
FP7262552MARINETUNIVERSITY COLLEGE CORK, NATIONAL UNIVERSITY OF IRELAND, CORKMarine Renewables Infrastructure Network for Emerging Energy Technologies

More information

Item ID: 38826
DC Identifier: http://oa.upm.es/38826/
OAI Identifier: oai:oa.upm.es:38826
DOI: 10.1016/j.oceaneng.2016.10.051
Official URL: http://www.sciencedirect.com/science/article/pii/S0029801816304942
Deposited by: Memoria Investigacion
Deposited on: 27 Jun 2017 07:26
Last Modified: 14 May 2019 10:06
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