Modification of endurance wave analysis based on New-wave theory

Abstract

The main objective of this investigation is to modify endurance wave analysis (EWA) based on New-wave theory for convenient assessment of offshore structures under extreme waves. EWA is a novel time history based approach to evaluate structural performance in various excitation levels of wave loading by intensifying wave records. In this article, modifications are proposed to determine appropriate time duration and intensifying trend for reliable and practical assessment of offshore structures. In this way, a simplified model of a real jacket platform is utilised to investigate the application of this approach under extreme wave conditions in the Persian Gulf and results are compared with typical three hour random wave simulations. It is shown that in extreme waves, except resonance states, proposed method can estimate the structural response with acceptable accuracy and very low computational costs.

Keywords:

• New-wave theory
• endurance wave analysis
• jacket platform
• extreme waves
• assessment

Acknowledgements

The authors are grateful to Mr Majid Kashani for stimulating discussion and providing very useful comments and suggestions.

Disclosure statement

No potential conflict of interest was reported by the authors.