Marqueur

Specialists in Numerical Simulation and Test Engineering

Aerostructure, engine, cabin, and systems: our teams have evolved with the main players in the aeronautical industry (aircraft manufacturers and OEM) and the space sector to develop ever more efficient solutions in terms of lightening and energy efficiency.

Armoured vehicles, military aviation, and naval forces: our teams have supported the key players in defence in developing and optimising state-of-the-art equipment.

Aerostructure

Along with equipment manufacturers and major aeronautical reports, over the course of several years, we have been acquiring solid knowledge of materials (composite, aluminium alloy, titanium) and the various manufacturing and assembly techniques (riveting, gluing) specific to the aeronautics and space sectors. Our knowledge of the standards in force and our expertise allow us to carry out studies ranging from the lightening of the structures of satellites to the simulation of the propagation of cracks in the frames of a fuselage (XFEM) through the analysis of the stresses on primary elements such as reinforcements between the fuselage and wing (crossbeam) or kerosene floors and tanks.

Naval

The development of digital twins for the design of a defence ship can significantly reduce design time. It also makes it possible to anticipate maintenance and to plan the modernisation of equipment. Acoustic discretion is one of the key topics in the development of a submarine or surface vessel; its purpose is to limit the noise and vibrations that can come from the propulsion or structure.

Our know-how in the management of large-scale modelling and in the automation of meshes finds all its importance in the naval field. Our teams are able to simulate wave behaviour and optimise propulsion systems while reducing vibration and acoustic noise.

Motorisation

The propulsion system is a central element in the development of an aircraft. Our teams have the opportunity to respond to the problems of engine manufacturers on several aspects such as simulation of the propagation of cracks in turbine blades or crash simulations performed upstream of the famous Bird Strike. Our technical expertise also allows us to analyse the mechanical strength of the points of attachment between the pylon and the nacelle, but also to evaluate the pressures and thermal stresses within the turbines.

Cabin

The development of the interior fittings of the cabin is very important because it contributes to the manufacturers' image. Our expertise in fluid mechanics and our advanced software solutions allow us to intervene on various issues related to passenger comfort such as the efficiency of air conditioning in the cabin. We can also perform analysis and optimisation of interior equipment such as seats, partitions, sanitary modules or storage boxes.

Systems

Surveillance, communication, navigation, the number of components and ancillary equipment in aeronautics are very important. Thanks to our knowledge of the standards set up by the Radio Technical Commission for Aeronautics (RTCA), we can help our customers to design and optimise these systems. This special expertise allows our teams to answer questions on vibration analysis, fatigue and emergency landing equipment maintenance, but also regarding electromagnetic compatibility.

Armoured vehicles

The development of defence and security vehicles is linked to their operational activity. Their mobility platforms can be optimised for obstacle clearance, but must also ensure the stability of the weapons regardless of the terrain where the vehicle is operated. The protection of those on board is essential, and the integrity of the vehicle, in the event of mine explosion or ballistic impact, must be ensured by the shielding, a characteristic element of these vehicles.

Our teams work with major players in the construction of military vehicles for the development of platforms with our multibody simulation tools. Our expertise in fluid mechanics also leads us to optimise the air conditioning systems for the comfort of the troops. We also support them for armour optimisation via the numerical simulation of ballistic impacts and explosions of buried mines.

Our actions

Initial design and lightweight design

  • Research of innovative structural concepts
  • Feasibility multi-material parts (aluminium, titanium, composites)
  • Welded, riveted, bolted or glued joints

CFD, external and internal aerodynamics, heat exchange

  • Compressor study and turbine characterisation
  • Study of air intake and flow splitters (pressure drops)
  • Design and optimisation of blades and rotors (detachments, boundary layers)
  • Internal combustion engine
  • Thermal comfort in cabin and steering position
  • Thermics of electronic equipment
  • Mine explosion
  • Fluid interaction structure
  • Ballistic pulse effect

Multibody dynamics

  • Vehicle dynamic behaviour specific to military operations
  • Subsystem analysis
  • Fatigue, vibrations

Structure and crash calculation

  • Fatigue resistance of the systems within the structure (random vibrations)
  • Crack propagation: fuselage and turbine blades (XFEM)
  • Crash specific to bird risk
  • Other impacts

Acoustics/Electromagnetism

  • Vibroacoustic simulation
  • Electromagnetic compatibility (EMC)

Tests

  • Characterisation of shielding materials
  • Hopkinson tests (high speed of deformation)
  • Gleeble tests (high temperature)
  • Semi-anechoic chamber
  • HALT & HASS
  • Test follow-up
  • Correlation of test calculations

Respect of norms and standards

  • Environmental Conditions and test Procedures for Airborne Equipment
    RTCA DO-160, EUROCAE ED-14
  • Environmental Engineering Considerations and Laboratory Tests
    MIL-STD-810
  • Airbus, Boeing Standards
    NATO STANAG, GAM, DEF STAN