The evolution of the shipping industry (increased capacity and size of ships, power and self-propulsion), the increased productivity and rearrangement of spaces (port calls increased in number and frequency, changes in use of docks), the intensification of the use not only of stern main thrusters (conventional or azimuthal) but also lateral bow and stern ones, to maneuver independently without the help of a tugboat, are the leading cause of injury to the toe of the docks. The latest recommendations for the design of protection systems of the docks toe based on the determination of the velocities induced at the bottom by the propeller shows significant differences. One of the main problems is the interpretation of parameters related to propellers, but also the fact of not considering important aspects such as different types of propeller, maneuvering practices for docking and undocking, propulsors orientation or the confinement effect generated by the dock itself and the shelter of the vessel. The project aims to assess the erosion generated by the propulsion of ships during docking and undocking maneuvers, using a simulator of ship maneuvering, a Lagrangian numerical model, laboratory tests and field data. The methodology also allows design and evaluation of protective measures. The proposed objectives are: • to obtain an improved and updated methodology for assessing the speeds generated by the ship propellers during the docking and undocking maneuvers • to develop / validate a numerical tool to simulate the sediment transport induced by the ship propellers in port areas. • to assess the erosive potential considering the effect of the pier and ship. • to assess the erosive potential considering the variables of the operational maneuver (engine orders, propulsor orientation, ...) • to design docking and undocking maneuvers less aggressive. • to evaluate an optimal bottom protection by means of rubble mound layers.
Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica 2008-2011
Ingeniería y Arquitectura
Proyectos de investigación y acciones complementarias
Gobierno De España. Ministerio De Economía Y Competitividad, Mineco
Mujal-Colilles, A.; Gironella, X.; Sanchez-arcilla, A.; Puig-Polo, C.; Garcia, M. Journal of hydraulic research Vol. 57, num. 1, p. 1-8 DOI: 10.1080/00221686.2016.1252801 Date of publication: 2017-01 Journal article