Heavy rail / Urban light rail

Vibration fatigue of vehicle components

Optimizing rolling stock maintenance by evaluating the severity of vibratory stresses and their effect on the life of vehicle components via tests conducted on the line.

Objectives

  • Predict life expectancy of a rolling stock component with regard to the stresses measured
  • Quantify severity of various vibratory stresses applied on vehicle components using a method based on Fatigue Damage Spectrum (FDS) and Shock Response Spectrum (SRS) calculations
  • Compare FDS of vibratory signals measured on components “Normative and functional FDS”, calculated from the Power Spectral Density (PSD)
  • Understand the causes of failures and check that repaired parts keep their integrity over time
  • Study component behaviour on track and in revenue service traffic – with or without people onboard (“black box” test)

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Test
facilities

  • Multi-channel data acquisition device
  • Calibrators
  • Data processing software
  • Portable and independent recorder “CleA”
  • Measuring system PULSE
  • Piezoelectric accelerometers, strain gauges, force sensors, displacement and pressure sensors, ammeters, voltmeters, etc.
  • Shakers (various frequencies)

Our
references

Satisfied customers

ALSTOM
RATP
SNCF

Norms

- EN 61373 -

Rolling stock equipment - Shock and vibration tests

- MA 42100 -

Authorization to perform measurements on trains in revenue service

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