Ship collision analysis on Offshore Wind Turbine monopile foundations

[en] An offshore wind farm covers a large maritime area and the site can be located close to traffic lanes of commercial and passenger ships, which may lead to possible collision events. The work presented in this paper aimed to understand both the crushing behavior and the nacelle dynamics of a predefined monopile offshore wind turbine when impacted by a ship. Another objective was to deeply investigate the influence of various parameters like ship impact velocity and location, wind direction, soil stiffness and deformability of the striking ship. First, nonlinear numerical simulations of ship - Offshore Wind Turbine (OWT) collisions have been carried out with a rigid striking ship for a better understanding of the OWT’s structural behaviour during collision. Different configurations for the wind turbine’s structure have been used in order to highlight the modifications in behaviour induced by changing the soil conditions or the loading scenario. The resulting resistant force and internal energies have been compared as well as the tower top (nacelle) displacements and accelerations. Then, another series of simulations have been performed with a deformable ship in order to investigate the influence of the deformability of the striking ship on the OWT’s behaviour. It is worth noting that all these numerical results will further serve to fix the hypotheses for the development of a simplified tool based on analytical formulations.

Disciplines :

Civil engineering

Author, co-author :

Bela, Andreea ; Université de Liège > Département ArGEnCo > Constructions hydrauliques et navales

Le Sourne, Hervé

Buldgen, Loïc ; Université de Liège > Département ArGEnCo > ANAST (Systèmes de transport et constructions navales)

Rigo, Philippe ; Université de Liège > Département ArGEnCo > Constructions hydrauliques et navales

Language :

English

Title :

Ship collision analysis on Offshore Wind Turbine monopile foundations

Publication date :

2017

Journal title :

Marine Structures

ISSN :

0951-8339

Publisher :

Elsevier Science, Oxford, United Kingdom

Volume :

Pages :

220-241

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 02 December 2016

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