Assessment of offshore structures under extreme wave conditions by Modified Endurance Wave Analysis

Dastan Diznab, M. A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.marstruc.2014.06.003
  3. Abstract:
  4. Recently, various approaches have been introduced to estimate the response of offshore structures in different sea states by stepwisely intensifying records. In this article, a more practical approach entitled Modified Endurance Wave Analysis (MEWA) considering the random and probabilistic nature of wave loading and utilizing optimal time duration is introduced. Generation procedure of this approach is described based on two practical wave theories: random and constrained new-wave. In addition, assessment of a simplified model representing a typical fixed offshore platform under extreme wave conditions in the Persian Gulf is performed making use of MEWA. A comparative analysis has been also carried out to investigate the accuracy and computational costs of MEWA. The results indicate that MEWA can be a time-saving and also reliable method both in design and assessment of offshore platforms
  5. Keywords:
  6. Extreme waves ; Jacket platform ; Modified Endurance Wave Analysis ; Probabilistic assessment ; Drilling platforms ; Ocean currents ; Offshore structures ; Comparative analysis ; Computational costs ; Different sea state ; Fixed offshore platforms ; Jacket platforms ; Probabilistic assessments ; Wave analysis ; Loading ; Accuracy assessment ; Design ; Dynamic analysis ; Dynamic response ; Jack up platform ; Offshore structure ; Probability ; Reliability analysis ; Structural analysis ; Structural response ; Wave field ; Wave-structure interaction ; Arabian Sea ; Indian Ocean ; Persian Gulf
  7. Source: Marine Structures ; Volume 39 , December , 2014 , Pages 50-69 ; ISSN: 09518339
  8. URL: http://www.sciencedirect.com/science/article/pii/S095183391400046X