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New BART wheel tech shushes screeching rails


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#1 CNJRoss

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Posted 31 August 2016 - 01:01 PM

 

 

 

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Release Date: 08/31/2016

New BART wheel tech shushes screeching rails

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There’s news about noise: using what is literally cutting edge technology, BART is slightly changing the surface of the train wheels to make for a quieter ride.  The new “wheel profile” is already being used on the Fleet of the Future pilot car on the test track and the early reviews are glowing.  “According to the train operators, the ride quality, compared to our existing cars, is like night and day ” says Chief Vehicle Engineer Henry Kolesar. ...

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#2 CNJRoss

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Posted 16 October 2017 - 02:52 PM

We're celebrating Halloween by taking some of the shriek out of the system.
 

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Release Date: 10/16/2017

 

Taking Aim at Noise Pollution

 

 

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Last year in August, BART announced a design breakthrough hailed as music to our riders’ ears: a small change in the way train wheels contact the rails that our engineers hoped would make a big difference toward reducing noise. By slightly tapering the wheel profile using the latest simulated modeling techniques, we hoped to reduce metal-on-metal contact and its shrieking consequences.

 

Fast forward to today and the results are in: the new, reduced-contact wheel profile has shown as much as a 15 dB decrease in interior noise on the current fleet. 15 fewer decibels may not sound like a big jump, but remember that decibels—like the Richter Scale—are measured logarithmically, not linearly.  As shown in the graphic, a 15 dB decrease is many times quieter than before. With the newly arriving train cars’ micro-plug doors, passengers can only expect things to get better moving forward. Click here to read more...

 






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