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Re: BART's noise problem
Author: Edward
Date: 09-19-2014 - 17:45

This is known as wheel howl, as opposed to wheel squeal on tight turns.

There is a section on this in:

Noise Report

It is a resonance problem that can happen on dead straight and level track. It is an interaction that depends on the shape of the wheel, type of suspension and aluminum centered wheels. Once the oscillation starts corrugating the tracks it gets worse and you have to call out the grinders.

It seems to be a BART only problem. The cure must be difficult and/or expensive as it is still with us after 40 years.

The BART wheels are not cylindrical, which I see mentioned often, but they do have a reduced taper.

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Subject Written By Date/Time (PST)
  How San Francisco Is Designing Its Metro Train of the Future WebDigger 09-17-2014 - 17:54
  Re: How San Francisco Is Designing Its Metro Train of the Future R Ruiz 09-18-2014 - 16:07
  BART's noise problem Dragoman 09-19-2014 - 12:54
  Re: BART's noise problem mook 09-19-2014 - 13:25
  Re: BART's noise problem Edward 09-19-2014 - 17:45
  Re: BART's noise problem Dr Zarkoff 09-19-2014 - 20:10
  Re: BART's noise problem fkrock 09-20-2014 - 09:59
  Re: BART's noise problem Tony C 09-21-2014 - 19:04
  Re: BART's noise problem Dr Zarkoff 09-21-2014 - 20:10
  Re: BART's noise problem Jimmy 420 09-24-2014 - 22:19
  Re: BART's noise problem Sumotuwe 09-25-2014 - 19:54


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