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A Simplified Procedure to Assess the Strength of a Ship Impacting a Lock Miter Gate

Publication Date
  • Engineering
  • Computing & Technology :: Civil Engineering [C04]
  • Ingénierie
  • Informatique & Technologie :: Ingénierie Civile [C04]
  • Physics


Paper _3_ 1 Copyright © 2013 by ASME Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering OMAE2013 June 9-14, 2013, Nantes, France OMAE2013 - 11067 A SIMPLIFIED PROCEDURE TO ASSESS THE STRENGTH OF A SHIP IMPACTING A LOCK MITERED GATE Loïc Buldgen FRIA PhD Student, University of Liège ANAST Department, Liège, Belgium Hervé Le Sourne Professor, Institut Catholique d’Arts et Métiers Mechanical Engineering Department, Nantes, France Philippe Rigo Professor, University of Liège ANAST Department, Liège, Belgium ABSTRACT This paper presents a simplified procedure allowing for a rapid prediction of the strength of a lock mitered gate submitted to a ship impact. In this article, the force opposed to the penetration of the vessel is derived by supposing that the bow is perfectly rigid, so the total initial kinetic energy has to be entirely transformed through an internal dissipation. For a given penetration of the striking vessel, an analytical procedure is followed in order to estimate the amount of energy dissipated by local and global deformations of the impacted structure. An equivalent quasi-static force is then derived. A comparison is made with a finite elements simulation in order to test the analytical procedure. 1 INTRODUCTION Locks are undoubtedly essential and common structures on inland waterways. Although some recent efforts have been made to improve the navigation near such installations, the gates are often impacted by ships travelling too fast. Most of the time, these collisions lead to some minor damages such as a loss of watertightness. However, as the fluvial traffic is growing, it is to fear that the frequency of these accidents is going to follow the same trend. Moreover, as ships are also getting larger, collisions are likely to have much more severe consequences. For these reasons, it seems reasonable to think that ship impact on loc

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