Non-linear dynamic analysis of offshore jack-up units
A two-dimensional finite element program for the non-linear dynamic analysis of offshore jack-up units under storm loading is described. The program aims to incorporate consistent and reasonable levels of approximation of all the major system parameters; this is in contrast to many previous approach...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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1998
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| _version_ | 1797076819574259712 |
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| author | Williams, M Thompson, R Houlsby, G |
| author_facet | Williams, M Thompson, R Houlsby, G |
| author_sort | Williams, M |
| collection | OXFORD |
| description | A two-dimensional finite element program for the non-linear dynamic analysis of offshore jack-up units under storm loading is described. The program aims to incorporate consistent and reasonable levels of approximation of all the major system parameters; this is in contrast to many previous approaches, which have tended to model some aspects of the problem in great detail while adopting a very simplified approach to others. Accurate modelling of the jack-up legs is achieved using an Eulerian formulation of beam column theory. The complex non-linear behaviour of the spudcan footings is represented by a recently developed work-hardening plasticity model, which represents a considerable advance over the simple pinned footing assumption which is most frequently used for jack-up analysis. Several options for calculating wave kinematics are available, including Stokes' fifth order wave theory. The resulting non-linear equations are solved in the time domain using implicit integration algorithms. Results for some representative test cases are presented. © 1998 Elsevier Science Ltd. All rights reserved. |
| first_indexed | 2024-03-07T00:09:11Z |
| format | Journal article |
| id | oxford-uuid:789e2ca9-e046-4ea3-84c1-70251a23c1f8 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:09:11Z |
| publishDate | 1998 |
| record_format | dspace |
| spelling | oxford-uuid:789e2ca9-e046-4ea3-84c1-70251a23c1f82022-03-26T20:31:51ZNon-linear dynamic analysis of offshore jack-up unitsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:789e2ca9-e046-4ea3-84c1-70251a23c1f8EnglishSymplectic Elements at Oxford1998Williams, MThompson, RHoulsby, GA two-dimensional finite element program for the non-linear dynamic analysis of offshore jack-up units under storm loading is described. The program aims to incorporate consistent and reasonable levels of approximation of all the major system parameters; this is in contrast to many previous approaches, which have tended to model some aspects of the problem in great detail while adopting a very simplified approach to others. Accurate modelling of the jack-up legs is achieved using an Eulerian formulation of beam column theory. The complex non-linear behaviour of the spudcan footings is represented by a recently developed work-hardening plasticity model, which represents a considerable advance over the simple pinned footing assumption which is most frequently used for jack-up analysis. Several options for calculating wave kinematics are available, including Stokes' fifth order wave theory. The resulting non-linear equations are solved in the time domain using implicit integration algorithms. Results for some representative test cases are presented. © 1998 Elsevier Science Ltd. All rights reserved. |
| spellingShingle | Williams, M Thompson, R Houlsby, G Non-linear dynamic analysis of offshore jack-up units |
| title | Non-linear dynamic analysis of offshore jack-up units |
| title_full | Non-linear dynamic analysis of offshore jack-up units |
| title_fullStr | Non-linear dynamic analysis of offshore jack-up units |
| title_full_unstemmed | Non-linear dynamic analysis of offshore jack-up units |
| title_short | Non-linear dynamic analysis of offshore jack-up units |
| title_sort | non linear dynamic analysis of offshore jack up units |
| work_keys_str_mv | AT williamsm nonlineardynamicanalysisofoffshorejackupunits AT thompsonr nonlineardynamicanalysisofoffshorejackupunits AT houlsbyg nonlineardynamicanalysisofoffshorejackupunits |