All moving and non-moving parts from a train system will be included in the monitoring by constantly measuring noise and vibrations on the carriages as well as on the rails.
To make sure your trains will keep rolling without any issues we need to consider all of the below parts:
- Wheel roughness
- Rail roughness
- discontinuities of the wheels
- discontinuities of the rail/track
- differential slip, lateral slipping, rubbing of wheel flange
From the above, we can determine the wheel and rail receptance and the interactions.
Onwards we can determine the carriage response, bogie response, wheel response, rail response, track response and ground response.
From all the mentioned contributors we can then accumulate and distinguish the radiation (wheel, carriage, bogie, track).
Finally, we can determine the mitigation to lower the noise inside carriages, the noise outside the train (pass by), vibrations at wayside, buildings and structure born noise.