Effects of irregular nonlinear ocean waves on the dynamic performance of an example jack-up structure during an extreme event

J Mirzadeh; M Kimiaei; MJ Cassidy

Journal article

Effects of irregular nonlinear ocean waves on the dynamic performance of an example jack-up structure during an extreme event

J Mirzadeh, M Kimiaei, MJ Cassidy

Marine Structures | ELSEVIER SCI LTD | Published : 2016

DOI: 10.1016/j.marstruc.2016.05.007

Abstract

In this paper, the effects of the nonlinearity and irregularity of ocean waves on the nonlinear dynamic response of a jack-up structure are investigated. A finite element model of a sample jack-up platform is formulated in USFOS to include the effect of material and geometrical nonlinearity and spudcan-soil-structure nonlinear interactions. Second-order NewWave and Constrained NewWaves are developed to simulate the nonlinearity of ocean waves. The nonlinear water surface and water particle kinematics for a typical extreme wave condition are estimated and implemented in the developed model, and the results are compared in terms of deck displacements. The results obtained from the analyses ind..

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University of Melbourne Researchers

Mark Cassidy Author

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2013 AUSTRALIAN LAUREATE FELLOWSHIP - PROF MARK CASSIDY - NEW FRONTIERS IN OFFSHORE GEOTECHNICS: SECURING AUSTRALIA'S ENERGY FUTURE (TRANSFER IN)

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Grants

Awarded by Lloyd's Register Foundation

Funding Acknowledgements

This study was performed with the support from the Australian Research Council (ARC) Centre of Excellence for Geotechnical Science and Engineering (CE110001009), the ARC Laureate Fellowship scheme (FL130100059) and the Lloyd's Register Foundation (LRF). LRF is a UK registered charity and sole shareholder of Lloyd's Register Group Ltd, which invests in science, engineering and technology for public benefit worldwide. This support is appreciated. The helpful advice and comments from Dr. Tore Holmas of USFOS A/S and Prof. Jorgen Amdahl of the Norwegian University of Science and Technology during the course of this study are also appreciated.