Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Numerical analysis of cables in the offshore environment
Includes bibliographical references.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Mechanical Engineering
2014
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613248239435777 |
|---|---|
| access_status_str | Open Access |
| author | Davies, Graham John |
| author2 | Pearce, H T |
| author_browse | Davies, Graham John Pearce, H T |
| author_facet | Pearce, H T Davies, Graham John |
| author_sort | Davies, Graham John |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/8388 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:07.122Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mechanical Engineering |
| publisherStr | Department of Mechanical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/8388 Numerical analysis of cables in the offshore environment Davies, Graham John Pearce, H T Mechanical Engineering Includes bibliographical references. The extraction of mineral resources from deep ocean waters has been made possible by the development of large compliant offshore structures. Mooring cables are crucial components in these offshore facilities and form the basis of this study. The aims of this thesis are: to provide a comprehensive review on all aspects of cables, to determine criteria for numerical modelling, and to ascertain the capabilities of the finite element method for cable analyses using the F.E. package ABAQUS. Difficulties associated with large sag cables arise as a result of their inherent flexibility which causes ill-conditioning of the stiffness matrices. Furthermore, the cable winding configuration causes a nonlinear stress-strain relationship, it's sagged geometry results in nonlinear strain-displacement relations, and the immersion in water leads to nonlinear fluid loadings arising from Morison's Equation as well as uncertainties in the fluid parameters. Various models, starting with the developed. Convergence difficulties basic catenary, have been at start-up, caused by a lack of stiffness in the transverse direction, are avoided by supporting the cable when applying loads. It is further established that numerical analyses of flexible structures are most stable in dynamic analyses and when under tension. In general both displacement based isoparametric and hybrid beam elements were found to be more reliable and applicable than truss elements. Cable whip, ocean floor contact and harmonic motions of cables were analysed. Finally a cable/tower interaction was modelled and subjected to a Stokes's wave. Conclusions and guidelines are presented based on the numerical experiments carried out in this study. 2014-10-11T12:16:31Z 2014-10-11T12:16:31Z 1988 Master Thesis Masters MSc http://hdl.handle.net/11427/8388 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Mechanical Engineering Davies, Graham John Numerical analysis of cables in the offshore environment |
| thesis_degree_str | Master's |
| title | Numerical analysis of cables in the offshore environment |
| title_full | Numerical analysis of cables in the offshore environment |
| title_fullStr | Numerical analysis of cables in the offshore environment |
| title_full_unstemmed | Numerical analysis of cables in the offshore environment |
| title_short | Numerical analysis of cables in the offshore environment |
| title_sort | numerical analysis of cables in the offshore environment |
| topic | Mechanical Engineering |
| url | http://hdl.handle.net/11427/8388 |
| work_keys_str_mv | AT daviesgrahamjohn numericalanalysisofcablesintheoffshoreenvironment |