The effect of damping the wheels and varying wheel/rail friction coefficient on railway noise
2007 (English)In: 19th International Congress on Acoustics, 2007Conference paper (Other academic)
The main noise source when a rail vehicle is circulating under approximately 280 km/h is theinteraction between wheel and rail. This paper presents a summary of different solutions thatcould be envisaged to reduce the level of this source. Being the wheel the most criticalcomponent for noise emission, particular attention is being paid to existing solutions to adddamping to the wheel. A wheel including a friction damping solution –a modified ring damper- isanalysed in detail. Ring dampers are steel rings fitted inside grooves cut under the wheel rim,usually one at each side of the tread; in this case it is a heavier ring at one side of the wheel.The paper includes some experimental results obtained in the laboratory aiming at verifying themodal damping for the different modes with this “damped wheel” and some on track test for aglobal evaluation of the solution. Additionally, an analysis of the effectiveness of modifying thefriction coefficient between the rail and the wheel is also reported. A “friction modifier” is addedat the top of the rail and noise and vibration measurements have been carried out on the trackfor an experimental evaluation of its effectiveness.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-72803OAI: oai:DiVA.org:kth-72803DiVA: diva2:488142
19th International Congress on Acoustics. Madrid, Spain. 2-7 September 2007
QC 201205242012-02-012012-02-012012-05-24Bibliographically approved