Advances in the three-dimensional fluid–structure–soil interaction analysis of offshore jack-up structures |
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| Institution: | 1. School of Civil Engineering, Qingdao University of Technology, Qingdao, 266033, China;2. Research Center of Coastal and Urban Geotechnical Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China;3. Hainan Institute, Zhejiang University, Sanya, 570203, China;1. Purdue University, School of Mechanical Engineering, West Lafayette, IN 47907, US;2. Lebanese American University, Department of Industrial and Mechanical Engineering, Byblos, Lebanon;1. Centre for Autonomous Marine Operations and Systems (AMOS), NTNU, NO-7491, Trondheim, Norway;2. Centre for Ship and Ocean Structures (CeSOS),NTNU, NO-7491, Trondheim, Norway;3. Department of Marine Technology, NTNU, NO-7491, Trondheim, Norway;4. PC Sandvik Marine, Trondheim, Norway;5. Fred. Olsen Windcarrier, Olso, Norway |
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| Abstract: | The operation of mobile jack-up drilling rigs in harsher ocean environments requires enhanced understanding of their behaviour in storm loading conditions and suitable numerical simulation tools for the assessment of their suitability for a particular site. This paper introduces the numerical program SOS_3D, which incorporates appropriate models for the three components of the structure, the soil and the environmental loading of offshore structures like jack-ups. The program is formulated for three-dimensional (3D) analysis and provides an integrated approach to the inter-related aspects of fluid–structure–soil interaction analysis. In applying the program, results of an example jack-up subjected to both symmetric and asymmetric loading situations are compared and discussed. Quasistatic push-over analyses are used to illustrate aspects of jack-up behaviour in three dimensions. Furthermore, jack-up response to storm loading conditions is predicted in dynamic wave loading analyses, demonstrating the necessity of 3D dynamic simulations and emphasising the benefit of using a force-resultant foundation model based on plasticity theory. |
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