Stuart Grassie presents on rail corrugation and wheel/rail noise

Posted by RailMeasurement on 24 January 2011

In January 2011, Dr Grassie gave a presentation on rail corrugation and wheel/rail noise to the TRB Annual Conference in Washington, DC.  The presentation is available here.  This contains excellent measurements from colleagues worldwide using RML equipment, including RCA measurements on p22 showing not only how corrugation is reduced during grinding to a level of less than 4 microns RMS but also that such minute levels can be measured reliably using RML equipment during the reprofiling operation itself and from a grinding train.  CAT measurements made by colleagues at SWJTU in Chengdu (page 21) show how quickly corrugation develops again at this site.  Measurements of corrugation and ground-borne noise, made by colleagues at London Underground, are also included that show how a reduction in low frequency noise correlates with the reduction in longer wavelength corrugation resulting from reprofiling.