Analytical formulations to assess the energy dissipated at the base of an offshore wind turbine jacket impacted by a ship

Pire, Timothée; Le Sourne, Hervé; Echeverry Jaramillo, Sara; Rigo, Philippe

doi:10.1016/j.marstruc.2018.02.002

Article (Scientific journals)

Analytical formulations to assess the energy dissipated at the base of an offshore wind turbine jacket impacted by a ship

Pire, Timothée; Le Sourne, Hervé; Echeverry Jaramillo, Sara et al.

2018 • In Marine Structures, 59, p. 192-218

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/221677

DOI
10.1016/j.marstruc.2018.02.002

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Keywords :

Ship collisions; Offshore wind turbine jacket; Analytical developments; Simplified method; Collisions de navires; Jacket d'éolienne offshore; Développements analytiques; Méthode simplifiée

Abstract :

[en] This paper presents some new analytical developments carried out to assess the energy dissipated plastically at the base of an offshore wind turbine jacket impacted by a ship. The jacket components involved in this mechanism are both the impacted leg and the rear leg, considered as clamped at the foundation level, as well as the horizontal bottom brace considered as rigidly fixed on the legs. The foundation system is assumed to be piles inserted into sleeves with cement grout. The base of the jacket is divided into four zones and a kinematically admissible displacement field is assumed for each of them. Based on plastic limit analysis, new analytical formulations are derived to assess the resistance and the dissipated energy for each considered area and therefore of the whole jacket base. To validate the method, full scale ship-jacket collisions are simulated both analytically and numerically and plastic energy dissipated at the base of the jacket is compared successfully with nonlinear finite element simulation results.

Disciplines :

Civil engineering

Author, co-author :

Pire, Timothée ; Université de Liège - ULiège > Département ArGEnCo > ANAST (Systèmes de transport et constructions navales)

Le Sourne, Hervé ; Université de Liège - ULiège > Département ArGEnCo > Constructions hydrauliques et navales

Echeverry Jaramillo, Sara ; Université de Liège - ULiège > Département ArGEnCo > ANAST (Systèmes de transport et constructions navales)

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

Language :

English

Title :

Analytical formulations to assess the energy dissipated at the base of an offshore wind turbine jacket impacted by a ship

Alternative titles :

[fr] Formulations analytiques pour évaluer l'énergie dissipée à la base d'un jacket d'éolienne offshore impacté par un navire

Publication date :

2018

Journal title :

Marine Structures

ISSN :

0951-8339

Publisher :

Elsevier, Netherlands

Volume :

Pages :

192-218

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 29 March 2018

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