Numerical modeling of extreme wave slamming on cylindrical offshore support structures

Document Type

Conference Proceeding

Date of Original Version



In this paper, we study the impact on cylindrical piles of extreme waves (freak waves), generated by directional wave focusing. Waves are numerically modeled based on a boundary element discretization of fully nonlinear potential flow equations with free surface evolution. Higher-order boundary elements are used for the spatial discretization, and a higher-order time integration scheme based on the Taylor series expansion is applied. We model the pressure impact of a freak wave on a cylindrical offshore support structure, as the slamming process of a wave front around a circular cross-section, by a finite volume - volume of fluid approach. Results are analyzed in detail and compared to an analytic solution and to experimental results. Finally, the full loading on a cylindrical tower structure, due to a freak wave, is determined. Copyright © 2006 by The International Society of Offshore and Polar Engineers.

Publication Title

Proceedings of the International Offshore and Polar Engineering Conference