| EPSRC Reference: |
GR/J23600/01 |
| Title: |
MOORING LINE DAMPING (FPS 97) |
| Principal Investigator: |
Brown, Dr D |
| Other Investigators: |
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| Department: |
Mechanical Engineering |
| Organisation: |
UCL |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 April 1994 |
Ends: |
31 July 1996 |
Value (£): |
108,283
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| EPSRC Research Topic Classifications: |
| Eng. Dynamics & Tribology |
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| EPSRC Industrial Sector Classifications: |
| Transport Systems and Vehicles |
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Summary on Grant Application Form |
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1. Establish from large scale model tests the damping forces on catenary mooring lines. 2. Compare results from calculation of catenary moored vessel horizontal excursions with and without mooring line damping contributions. 3. Assess the contribution owing to damping of combined low and wave frequency forcing compared to summing of forcing due to each effect in isolation. 4. Apply the revised methodology to the Managed Programme defined Case Study The project will quantify the contributions of catenary mooring lines to the damping forces. The experimental aspects of the project will consist of model testing of large scale chains of low negative buoyancy in the tank facilities at UCL. Tests on full scale chains will also be carried out to assess material (internal) damping. The hydrodynamic testing will concentrate on short segments at various inclinations and orientations to represent segments along a caternary mooring. A carriage arrangement will be constructed allowing sections to be towed along the tank simulating low frequency horizontal motion of the vessel. Wave frequency vertical and horizontal motion will be simulated by oscillators mounted on the carriage. Systematic series of tests will be performed to measure added mass and drag coefficients for representative ranges of profiles, wave frequency oscillations and simulated low frequency motion. Drag forces from the model tests will be used to establish damping forces on each line segment. These will be used within the existing finite element formulation of catenary mooring lines available at UCL, to estimate the line damping force contributions for all mooring lines.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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