In-car noise and carriage floor vibration on different track forms and curvatures in a metro system

Abstract

In-car noise and carriage floor vibration measurements were carried out on Guangzhou Metro (GZM) Line 1 in January 2006 to assess the effect of different track forms on noise and vibration levels within the carriage. The track forms tested included two different types of baseplate fastenings directly fixed to a rigid base slab (DFF), and one type of floating slab track (FST) systems. The measurements showed that the in-car noise and the carriage floor vibration levels were higher on curved sections of track than that on the straight. Comparing different track forms, there was no significant difference between the standard GZM baseplate track, and a PANDROL VANGUARD baseplate. However, the in-car noise level and the carriage floor vibration on the FST sections were much higher. The carriage floor vibration levels are generally higher in the vertical direction than in the lateral direction on both curved and straight track. © 2008 Springer-Verlag Berlin Heidelberg.