Metro and tram dynamic behaviour testing

Analyzing the behaviour of a vehicle following abnormal behaviour in revenue service.

Tests objectives

Determine by means of a device installed onboard the train:
– Tri-axial acceleration in the vehicle, bogies and axles
– Displacement of primary and/or secondary suspensions as well as pressure on air suspensions
– Lateral force on rubber-tyred rolling stock by means of a wheel force transducer
– Wheel lift (“wheel tread-railhead” height) over a short distance (e.g. turnout)
– Forces and displacements for couplers, buffers and rods
– Yaw, roll and pitch
Establish an image of the Y/Q ratio through equipment installed on the track

Tests facilities

Triaxial accelerometers
Displacement sensors
Pressure sensors
Strain gauges
Doppler radar

Testing norms

EN 14363 – Testing for the acceptance of running characteristics of railway vehicles – Testing of running behaviour and stationary tests

EN 15686 – Testing for the acceptance of running characteristics of railway vehicles with cant deficiency compensation system and/or vehicles intended to operate with higher cant deficiency than stated in EN 14363:2005, Annex G