A study on collision strength assessment of a jack-up rig with attendant vessel
| Autor: | Ma Kuk Yeol, Jae-Myung Lee, Jung Kwan Seo, Jeong Hwan Kim, Joo Shin Park |
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| Rok vydání: | 2020 |
| Předmět: |
Computer science
lcsh:Ocean engineering Attendant vessels 020101 civil engineering Ocean Engineering Probabilistic collision scenario 02 engineering and technology Design load 01 natural sciences Turbine 010305 fluids & plasmas 0201 civil engineering lcsh:VM1-989 Position (vector) Collision accidental loads 0103 physical sciences lcsh:TC1501-1800 business.industry Response analysis Impact energy Probabilistic logic lcsh:Naval architecture. Shipbuilding. Marine engineering Structural engineering Collision Ship–platform collision Brace Buckling Control and Systems Engineering business |
| Zdroj: | International Journal of Naval Architecture and Ocean Engineering, Vol 12, Iss, Pp 241-257 (2020) |
| ISSN: | 2092-6782 |
| DOI: | 10.1016/j.ijnaoe.2019.10.002 |
| Popis: | The rapid proliferation of oil/gas drilling and wind turbine installations with jack-up rig-formed structures increases structural safety requirements, due to the greater risks of operational collisions during use of these structures. Therefore, current industrial practices and regulations have tended to increase the required accidental collision design loads (impact energies) for jack-up rigs. However, the existing simplified design approach tends to be limited to the design and prediction of local members due to the difficulty in applying the increased uniform impact energy to a brace member without regard for the member’s position. It is therefore necessary to define accidental load estimation in terms of a reasonable collision scenario and its application to the structural response analysis. We found by a collision probabilistic approach that the kinetic energy ranged from a minimum of 9 MJ to a maximum 1049 MJ. Only 6% of these values are less than the 35 MJ recommendation of DNV-GL (2013). This study assumed and applied a representative design load of 196.2 MN for an impact load of 20,000 tons. Based on this design load, the detailed design of a leg structure was numerically verified via an FE analysis comprising three categories: linear analysis, buckling analysis and progressive collapse analysis. Based on the numerical results from this analysis, it was possible to predict the collapse mode and position of each member in relation to the collision load. This study provided a collision strength assessment between attendant vessels and a jack-up rig based on probabilistic collision scenarios and nonlinear structural analysis. The numerical results of this study also afforded reasonable evaluation criteria and specific evaluation procedures. |
| Databáze: | OpenAIRE |
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