| EPSRC Reference: |
GR/J09673/01 |
| Title: |
MODELLING OF MARINE DRAG ANCHORS (FPS 91) |
| Principal Investigator: |
Craig, Dr WH |
| Other Investigators: |
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| Department: |
School of Engineering |
| Organisation: |
Victoria University of Manchester, The |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
29 November 1993 |
Ends: |
28 November 1996 |
Value (£): |
172,324
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| EPSRC Research Topic Classifications: |
| Eng. Dynamics & Tribology |
Oil & Gas Extraction |
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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. To provide quantitative assessment of the dependency of drag anchor performance on size in a variety of soil conditions. 2. To quantify the effects of variations in anchor cable/chain characteristics in terms of drag/burial/load behaviour. 3. To provide comparisons between different anchor designs to illustrate possible benefits of using single high efficiency anchors as an alternative to multiple anchors of lower individual efficiency. The existing model containers in Manchester's geotechnical centrifuge will be replaced with a purpose designed narrow (planar) container with an overall length of 3 m which has been shown to be necessary to obtain adequate anchor drag distances not less than 30 fluke lengths after allowing for realistic cable lengths in front of a model anchor with a 50 mm fluke length. Using models of current anchor designs at a variety of acceleration levels in beds of both soft and stiff clays and of sand, a wide range of anchor masses can be simulated. A range of accelerations from 20 100, i.e. a factor of five, will simulate anchor masses varying by 5(3). The tests will provide a database for scale assessment that is more reliable than that which is the basis for the US NCEL design chart. A programme of 24 tests on a single anchor is envisaged. The effects of chain/cable variations will be investigated by a further series of 6 8 drag tests in soft clay when deep penetration will highlight the differences. With the longest possible drang length it is proposed to compare the relative merits of using single high efficience anchors as an alternative to multiple, piggy back anchors of more traditional design (4 6 tests).
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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 |
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| 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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