Rolling stock

Rolling stock type approval is a complex process. Our experts have a vital role to play, not just in performing the requisite tests but also in overseeing all the stages in the process.

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  • Heavy rail
  • Urban light rail
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Simulating passenger evacuation
Simulating evacuation of passengers from a train or a flow of passengers
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Heavy rail - Urban light rail
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Calculation of rolling stock trip times and energy consumption
Calculating trip time for a given route allowing for infrastructure and rolling stock limitations
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Heavy rail - Urban light rail
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Thermomechanical behaviour of wheels
Establishing residual stresses and deformation in a wheel after heating caused by brake shoe friction
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Heavy rail - Urban light rail
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Fatigue behaviour of wheels
Studying the mechanical behaviour of wheel centres under fatigue loads
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Heavy rail - Urban light rail
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Axle dimensions
Designing axle dimensions in relation to fatigue loads
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Heavy rail - Urban light rail
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Study of an airconditioning system and its optimum dimensions
Establishing the power requirements for heating and cooling modes to keep the temperature in a vehicle at an appropriate temperature
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Heavy rail - Urban light rail
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Simulation of brake system behaviour with EQS
Establishing the rolling stock braking parameters required for vehicles worked with ERTMS speed control and safety equipment
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Heavy rail - Urban light rail
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Simulation of electromagnetic compatibility between rolling stock and infrastructure
Mastering the electrical interaction phenomena between rolling stock and infrastructure
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Heavy rail - Urban light rail
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Simulation of pressure waves in tunnels
Establishing the aerodynamic phenomena created when trains pass through tunnels
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Heavy rail - Urban light rail
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Pressure variations caused by crossing trains
Estimating the pressure variations caused by crossing trains
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Heavy rail - Urban light rail
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Lineside pressure variations
Estimating lineside pressure variations caused by passing trains
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Heavy rail - Urban light rail
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Aerodynamic drag simulation
Establishing rolling resistance for the aerodynamic component
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Heavy rail - Urban light rail
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Simulation of longitudinal forces in freight wagons
Analysing the longitudinal tensile and compression forces developed by freight train brake gear
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Heavy rail - Urban light rail
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Rolling stock test and fatigue design criteria
Optimising the dimensions of vehicle bodies and bogies frames
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Heavy rail - Urban light rail
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Simulation of crosswinds
Studying the vulnerability of rolling stock to crosswinds along a line
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Heavy rail - Urban light rail
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Clearance gauge checks
Checking the compatibility of a type of rolling stock with the infrastructure on the French national network (RFN)
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Heavy rail - Urban light rail
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Establishing permissible longitudinal compression forces on wagons
Establishing permissible longitudinal compression forces by simulating behaviour in reverse curves
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Heavy rail - Urban light rail
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Study of derailment risks
Analysing derailment risks in relation to all rolling stock types
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Heavy rail - Urban light rail
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Study of dynamic vehicle behaviour
Simulating rolling stock dynamic behaviour
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Heavy rail - Urban light rail
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3D Simulation of the pantograph-OCL interaction
Optimizing current collection and the various components.
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Heavy rail - Urban light rail
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On-board acoustics
Qualify, characterize and simulate acoustics inside trains or premises.
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Heavy rail - Urban light rail
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Acoustic commissioning of light rail vehicles
Verify the compliance of noise levels emitted by a vehicle with the specifications and standards in force.
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Urban light rail
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Rolling stock – noise characterization
Locate, characterize and simulate the noise caused by trains as part of a type approval process.
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Heavy rail
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On-board aerodynamic measurements
Characterize railway aerodynamics phenomena for the type approval of rolling stock and infrastructure.
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Heavy rail
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Traction chain performance
Contribute to the development or qualification of traction chains for all types of rail vehicles – electric or diesel – through on board dynamic testing.
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Heavy rail
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Current collection quality at standstill
Monitoring the behaviour of the electrical equipment on conventional or high-speed lines and, where necessary, issuing remote warnings.
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Heavy rail - Urban light rail
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Rig for testing current collection of vehicles at standstill
Qualifying the current collection of trains at standstill for access to the French network.
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Heavy rail - Urban light rail
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Design and measurement of instrumented pantographs
Contributing to the current collection type approval process by checking pantograph-OCL interaction.
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Heavy rail - Urban light rail
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Current collection – pantograph / OCL interaction
Optimizing the vehicle-infrastructure combination and the quality of current collection while limiting wear in the contact wire and pantograph strips, for type approval and development purposes.
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Heavy rail - Urban light rail
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Electromagnetic interference
Checking that electrical equipment exposed to electromagnetic interference works properly for type approval purposes.
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Heavy rail
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Electromagnetic emissions and human exposure
Check that electromagnetic fields generated by rolling stock, or railway premises, do not affect passengers or staff.
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Heavy rail - Urban light rail
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Electromagnetic emissions
Check, for its type approval, that rolling stock complies with EMC regulations.
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Heavy rail
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Rolling stock electromagnetic compatibility
Checking that electrical signals generated by the train are compatible with the signalling, telecommunications, sub-stations and overhead lines for type approval purposes.
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Heavy rail - Urban light rail
Product
Drop shunt test rig
Check the influence of brake shoes on track circuit shunting.
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Heavy rail
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Drop shunt phenomena
Checking the drop shunt capacity of rolling stock for type approval purposes.
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Heavy rail
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WSP device characterization
Gauging the efficiency of WSP devices for type approval or development purposes.
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Heavy rail - Urban light rail
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Static brake tests
Contributing to the type approval process of a braking system by means of static tests
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Heavy rail
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Brake testing on open line
Measure the braking performance and associated forces for the type approval or development of any kind of rolling stock.
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Heavy rail - Urban light rail
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Rolling stock weighing procedures
Characterizing vehicle loads for type approval or an expert assessment purposes thus ensuring safety against derailment.
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Heavy rail - Urban light rail
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Characterization of wheel-rail contact
Assessing the main wheel-rail contact parameters for international type approval and check rolling stock behaviour in relation to the risk of instability.
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Heavy rail
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Design and manufacture of measurement axles
Measurement of wheel-rail contact forces using a specially equipped axle.
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Heavy rail
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Railway dynamics
Characterization of the dynamic behaviour of railway vehicles on the track for type approval or development purposes.
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Heavy rail