First Carnot MERS webinar: GHARSA and GOROV projects - 16th January 2023

The webinars will be an opportunity to present one or several research projects on the marine engineering theme. On the program, the discovery of the objectives and the main results of the projects financed by the Carnot MERS as well as exchanges with the project leaders.
The first webinar of the Carnot MERS institute will take place on 16th January 2023 from 11:00am to 12:00pm in videoconference.
The speakers are Frédéric GRONDIN Professor at the Research Institute of Civil and Mechanical Engineering (GeM) and Olivier KERMORGANT Professor at the Ecole Centrale de Nantes at the Laboratory of Digital Sciences of Nantes (LS2N)
 

REGISTRATION

Suivi localisé de biocolonisation sur les structures offshore (GOROV)

The objective of this project is to follow with accurately the evolution of biocolonization on offshore structures (wind farms, cables and anchors). This project proposes to develop an underwater robot with a precise location near these structures. The objective is to move towards monitoring and inspection, in time and space, of the evolution of the biocolonization of structures.

The underwater robots are classically located with a network of beacons, placed on the bottom (Long BaseLine) or connected to a surface vessel (Ultra-Short BaseLine). This method of location uses acoustic waves and is very sensitive to errors in the speed of sound propagation in water. This speed depends on temperature and salinity, which are often unknown. This leads to a very coarse localization, insufficient to hope to make repeatable measurements at the same locations on the scale of an offshore installation.

These same robots also have cameras but they are only used to give visual feedback to the user and the pilot. As such, the images captured are not used for localization although they contain valuable information on the position of the robot in relation to the structure.
 

Développement d'un dispositif de mesure de la déGradation cHemo-mécanique des mAtériaux pleins ou cReux immergéS dans l'eAu de mer (GHARSA)

The objective of this project is to implement a system for monitoring the degradation of structures immersed in the sea. Whether they are made of concrete, composites, elastomers or other new innovative materials, these structures are subjected to chemical reactions in contact with sea water while being mechanically stressed. The analysis of the degradation of these materials is generally done by decoupling the phenomena: chemical test in water loaded with chloride ions, followed by a mechanical test. However, in the case of porous or hollow structures, the mechanical loading can contribute to accelerate or slow down the chemical degradation, and vice versa. Therefore, to represent the situation at sea, it is preferable to use water with characteristics close to those of the sea.

Come and discover these projects by registering for the webinar organised on Monday 16th January 2023 from 11:00 to 12:00: REGISTRATION