Deep learning for multiple target detection and recognition in variable background. (Partners: IRISA, UBO UMR AMURE, MBDA)

Assessment of the ecological and socio-economic consequences of killer whales and sperm whales depredation on French longline fisheries: implementing a techno-economic approach for its suppression. The team uses passive acoustic monitoring to assess the impact of the noise coming from ships on cetacean attraction. (Partners: CEBC-CNRS, MNHN, UBO AMURE, INRA BIOSP, IRD MARBEC, IFREMER)

Hydroacoustic observatory of seismicity and biodiversity in the Indian Ocean (Partner: LGO UBO).

Whale monitoring using an acoustic glider (Partner: Total Foundation for Biodiversity).

(Open Science meets Ocean Sounds Explorer): a collaborative underwater passive acoustics project for ocean observation (Partners: IMT Atlantique, IUEM, WHOI [The Woods Hole Oceanographic Institution]).

For the characterization of marine environmental fluctuations (DGA TN order; in collaboration with WHOI).

This project brings together 37 partners from 11 countries to focus on 13 areas of innovation. The team leads the work carried out on the durability of bonds between a composite module and a metal structure and on the setting up of a high cycle fatigue design calculation chain for steel thrusters made using additive manufacturing, with large-scale validation testing (2017-2020 with PTR 2 and 5).

Fatigue properties of as-welded and post-weld treated assemblies (2018-2020, CIFRE PhD thesis).

Improving design methods for the production and industrialization of submarine hulls. The project will focus on two major topics: forming and fatigue behavior. The goal is to better define the initial mechanical state of the formed structure so as to take better account of its impact on the structure’s in-service behavior. (2019-2022)

Il porte sur la fatigue multiaxiale des arbres d’hélice.

Dans le cadre d’une thèse, les travaux visent la caractérisation rapide des propriétés en fatigue des matériaux métalliques utilisés.

Housed in a 2,000m2 research space, the MASMECA technology platform is equipped to perform multi-scale characterization of all types of materials, assemblies and structures. It works in partnership with the IRDL lab and Naval Group's Gustave Zédé lab.

• Dynamic characterization (high loading-speed testing)
• Thermomechanic characterization (controlled-environment mechanical condition testing)
• Physico-chemical characterization (evaluating the effects of microstructure on materials’ mechanical behavior)
• Measurements and observations
• Prototyping

The ECO-SYS-MER project, led by IRDL (ENSTA Bretagne, UBS, UBO, ENIB and CNRS) and funded by CPER 2015–2020, aims to improve and test the reliability of mechanical systems in the marine environment, working on a scale ranging from materials to systems.

The project has received €3,130K of new equipment and experimental facilities, with €2,075K of this amount invested at ENSTA Bretagne.

Recent acquisitions:

• Scanning electron microscope
• X-ray diffractometer and equipment associated with this observation method
• Kite sail piloting system
• TriboIndenter
• Internal pressure loading system for traction/compression loading machine
• Liquid nitrogen dispensing system
• Potentiostat for corrosion testing
• Fluid flow tracking device for high-speed camera
• Command system for actuator test bench
• etc...

ENSTA Bretagne has extensive on-campus experimental facilities dedicated to ICST, including:

• Anechoic chamber
• Software Defined Radio platform
• Drone systems and robotics area
• Test tank
• Hydrographic vehicles
• Robotics area

As a member of Brittany's Pôle d'Excellence Cyber, ENSTA Bretagne carries out research in fields ranging from antennas and analog channels to threat analysis through formal risk assessment.

The school has benefited from €2M of CPER-funded acquisitions and, in the context of the Cyber SSI Project, has already acquired a calculator, a supervisory control and data acquisition system (SCADA) and a radio frequency bench.

Autonomous underwater robots have proven their ability to consistently make high-quality and Sprecise measurements and observations in marine environments.

This project aims to expand their potential by replacing a single large autonomous underwater robot with a swarm of multi-environment robots (air, land and underwater).

CPER has approved an €865K budget for the purchase of components to assemble this robot flotilla, allowing ENSTA Bretagne to acquire surface drones, autonomous underwater microrobots, acoustic sensors, a mobile command center, small air drones, etc.

This project aims to develop a high-frequency data acquisition system able to characterize the marine environment under various conditions.

Additional equipment for building this system, including up/down converters and broadband antennas, have been added to existing experimental equipment.

The goal of the I-ROMI project is to create a research and experimentation platform to optimize marine observation systems, aiming for higher-quality measurements; less costly, more robust and adaptable observatories; less intrusive observation structures and protocols; and more user interaction.

In particular, the project will study the development of innovative and efficient passive acoustic observatories to monitor underwater ambient noise produced by geology, fauna and human activity.

Recent acquisitions include portable hydrophones and a calculation server.

Led by ENSTA Bretagne (Institut de Recherche Dupuy de Lôme1) with Naval Group and Safran, including the P’2 Institute, the “Self-Heating” chair has been accepted by the Agence Nationale de la Recherche (ANR) (National Research Agency). For four years, the teams will work on the heat signatures of materials. The aim: predict their in service performance and fatigue life.

• Total budget : 2 050 000€ financed by the ANR and the Safran and Naval Group industrial groups
• Period : 4 years. It will begin officially on 1 December 2020.
• Dedicated team : 8 PhDs, 4 post-doctorates and 13 research supervisors 
• Title : Characterization, modeling and rapid prediction of the polycyclic fatigue properties of materials based on thermometric measurements
• Objective : The rapid prediction and determination of the polycyclic fatigue properties of materials based on the study and modeling of the heat signature of damage mechanisms.

This research program is based on the “self-heating” method, that is to say, measuring the temperature of a material in precise experimental conditions. This technique enables the prediction of weak points, which can then be factored into design office calculation codes and thus delay or even avoid damage when designing a ship, submarine or plane. The Safran Group and Naval Group both wish to develop and extend this scientific “heat measurement” (or self-heating) approach to all the materials used in their respective applications, and are interested in the parameters at play in the fatigue of their materials (temperature, manufacturing process, type of load, surface preparation etc.). 

Lire l'article complet sur le projet de recherche RESISTANCE portant sur la caractérisation des contraintes dans les composants structurels en acier de forte épaisseur.

Un projet mené en partenariat avec Naval group dans le cadre du laboratoire commun Gustave Zédé.

Fatigue of a marine thruster made by additive manufacturing.

This project carried out with IFREMER focuses on durable and flexible polyamide moorings for marine renewable energy applications.

Fatigue design thermomechanical research work for 3D-woven composite materials in aeronautical applications; rapid determination of the high cycle fatigue properties (based on self-heating testing under cyclic loadings) of metal alloys for turbojets.

The fatigue design thermomechanical research work focuses on parts made from different materials (polyurethane foam or glass fiber reinforced thermoplastics).

Explosive devices pose a significant threat to property and people. The explosion generates significant thermal effects, a blast wave, and the scattering of fragments at initial speeds of about 2,000 m/s.

In order to protect against these effects, the solution is to interpose a physical barrier between the charge and its potential targets. Liquid foams (dispersion of a liquid phase within a gaseous phase) are excellent materials for attenuating sound waves, blast waves, and for decelerating projectiles.

The main aim of the COBADI project is the simple, fast in situ sizing of a two-phase protective barrier in accordance with the parameters relating to the threat (blast wave and hypervelocity fragment properties) and the liquid foam. The study aims to establish a substantial experimental database to describe the behavior of foams over a wide range of parameters and thereby be able to design an optimized foam for a targeted threat.

Probabilistic analysis of the nonlinear rolling of ships subjected to irregular swell [AID funding, in cooperation with Ecole navale]. This project aims to develop new methods to predict the risk of ships capsizing.

The ANR ASTRID MATURATION* project "PROBALCAV" (which stands for cavitating ballistic protection) has civilian and military applications. Its aim is to design an innovative concept for protection against projectiles, based on shock-induced cavitation. 

• Find out more

 [ANR ASTRID Maturation funding]

Sizing of floating wind turbines reflecting impacts and wave breaking [ANR/France Energies Marines funding]

Parametric optimization of foils; application to Olympic sailing

[Funding by Instituts Carnot ARTS et MERS, with Ecole navale and Ifremer]

 Transparent composite protection

[ANR ASTRID funding]

Survivability of Structure Against Energy deposition

[ANR ASTRID funding]

Materials providing protection against blast effects  (MAtériaux de Protection contre les effets de Souffle)

[ANR funding]

Development of a multi-material bonded structural assembly providing ballistic protection (2018-2021; in collaboration with the PTR3).

Thermal and mechanical characterization of aluminum/steel multi-material assemblies for vehicles (Funded by Bpifrance and Stellantis)

Characterization and modeling of the behavior of thick bonded interfaces (funded by Institut Carnot ARTS, the Brittany Region and Finistère Département)

The high-elongation adhesives used as thick applied seals are currently used to serve a structural assembly purpose (e.g.: ship hull, wind turbine blade, etc.).

This requires the implementation of suitable sizing methods that can factor in the behavioral complexity of such systems. Original tools have thus been developed in the context of the collaborative project COCOA (Brittany Region/Carnot Arts) involving the LAMIH (joint research unit/UMR CNRS 8201) and CETIM. Modeling of the damage of the bonded interface is compared to the findings of cracking tests under complex loading. 

Development of a technological test for validating the behavioral modeling of an adhesive subject to impact loads (funded by SAFRAN Composites - collaboration with PTR3)

Durability of bonded structural repairs (funded by AID)

Analytical and digital modeling of the lateral buckling of offshore pipelines (Funded by the Brittany Region)

13 areas of innovation have been determined for this European project that brings together 37 partners from 11 countries.

The team leads the work carried out on the durability of bonds between a composite module and a metal structure and on the setting up of a high cycle fatigue design calculation chain for steel thrusters made using additive manufacturing, with large-scale validation testing (2017-2020 with PTR 2 and 5).