Next Article in Journal
Deriving Bathymetry from Multispectral Remote Sensing Data
Next Article in Special Issue
On Peak Mooring Loads and the Influence of Environmental Conditions for Marine Energy Converters
Previous Article in Journal
Biobanking of a Marine Invertebrate Model Organism: The Sea Urchin
Article Menu

Export Article

Open AccessArticle
J. Mar. Sci. Eng. 2016, 4(1), 5; doi:10.3390/jmse4010005

Dynamically Scaled Model Experiment of a Mooring Cable

1
Division of Marine Technology, Department of Shipping and Marine Technology, Chalmers, Göteborg SE-412 96, Sweden
2
Department of Hydraulics, School of Civil Engineering, Chalmers, Göteborg SE-412 96, Sweden
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Raúl Guanche García
Received: 23 November 2015 / Revised: 28 December 2015 / Accepted: 15 January 2016 / Published: 25 January 2016
(This article belongs to the Special Issue Ocean Wave Energy Conversion)
View Full-Text   |   Download PDF [2099 KB, uploaded 26 January 2016]   |  

Abstract

The dynamic response of mooring cables for marine structures is scale-dependent, and perfect dynamic similitude between full-scale prototypes and small-scale physical model tests is difficult to achieve. The best possible scaling is here sought by means of a specific set of dimensionless parameters, and the model accuracy is also evaluated by two alternative sets of dimensionless parameters. A special feature of the presented experiment is that a chain was scaled to have correct propagation celerity for longitudinal elastic waves, thus providing perfect geometrical and dynamic scaling in vacuum, which is unique. The scaling error due to incorrect Reynolds number seemed to be of minor importance. The 33 m experimental chain could then be considered a scaled 76 mm stud chain with the length 1240 m, i.e., at the length scale of 1:37.6. Due to the correct elastic scale, the physical model was able to reproduce the effect of snatch loads giving rise to tensional shock waves propagating along the cable. The results from the experiment were used to validate the newly developed cable-dynamics code, MooDy, which utilises a discontinuous Galerkin FEM formulation. The validation of MooDy proved to be successful for the presented experiments. The experimental data is made available here for validation of other numerical codes by publishing digitised time series of two of the experiments. View Full-Text
Keywords: mooring cable; dynamic model test; scaling laws; numerical validation mooring cable; dynamic model test; scaling laws; numerical validation
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Bergdahl, L.; Palm, J.; Eskilsson, C.; Lindahl, J. Dynamically Scaled Model Experiment of a Mooring Cable. J. Mar. Sci. Eng. 2016, 4, 5.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
J. Mar. Sci. Eng. EISSN 2077-1312 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top