Rail squeal

Rail squeal is a screeching train-track friction sound, commonly occurring on sharp curves.

Squeal is presumably caused by the lateral sticking and slipping of the wheels across top of the railroad track. This results in vibrations in the wheel that increase until a stable amplitude is reached.[1]

Lubricating the rails has limited success. Speed reduction also appears to reduce noise levels.[2]

The sticking of the rim of the wheel causes the wheel to ring like a bell, so rubber dampeners or tuned absorbers are a possible solution to lower the volume. The Boston Green Line suffers from severe rail squeal on the sharp curves within the central subway. Flange stick graphite lubricators have been installed on trains to attempt to mitigate the rail squeal issue.[3]

The mechanism that causes the squealing also is the cause of wear and tear that is happening to both rails and wheels.

Factors

Factors include:

See also

References
  1. Rudd, M.J. (1976). "Wheel/rail noise—Part II: Wheel squeal". Journal of Sound and Vibration. 46 (3): 381–394. doi:10.1016/0022-460X(76)90862-2.
  2. Barnt Green Rail Noise - summary by Les Bailey
  3. Why the MBTA's Wheels Squeal -- And How It's Trying to Dampen the Noise
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.