Assessment of measurement-based methods for separating wheel and track contributions to railway rolling noise

Assessment of measurement-based methods for separating wheel and track contributions to railway rolling noise

Thompson, D.
Squicciarini, G.
Zhang, J.
Lopez Arteaga, I.
Zea, E.
Dittrich, M.G.
Jansen, H.W.
Arcas, K.
Cierco, E.
Magrans, F.X.
Malkoun, A.
Iturritxa, E.
Guiral, A.
Stangl, M.
Schleinzer, G.
Martin Lopez, B.
Chaufour, C.
Wändell, J.

2018

The noise produced during a train pass-by originates from several different sources such as propulsion noise, noise from auxiliary equipment, aerodynamic noise and rolling noise. The rolling noise is radiated by the wheels and the track and is excited by the wheel and rail unevenness, usually referred to as roughness. The current TSI Noise certification method, which must be satisfied by all new mainline trains in Europe, relies on the use of a reference track to quantify the noise from new vehicles. The reference track is defined by an upper limit of the rail roughness and a lower limit of the track decay rate (TDR). However, since neither the rail roughness nor the track radiation can be completely neglected, the result cannot be taken as representing only the vehicle noise and the measurement does not allow separate identification of the noise radiated by wheel and track. It is even likely that further reductions in the limit values for new rolling stock cannot be achieved on current tracks. There is therefore a need for a method to separate the noise into these two components reliably and cheaply. The purpose of the current study is to assess existing and new methods for rolling noise separation. Field tests have been carried out under controlled conditions, allowing the different methods to be compared. The TWINS model is used with measured vibration data to give reference estimates of the wheel and track noise components. Six different methods are then considered that can be used to estimate the track component. It is found that most of these methods can obtain the track component of noise with acceptable accuracy. However, apart from the TWINS model, the wheel noise component could only be estimated directly using three methods and unfortunately these did not give satisfactory results in the current tests. © 2018 Elsevier Ltd

Beamforming
Experimental methods
Railway noise
Rolling noise
Source separation
Transfer path analysis
Auxiliary equipment
Beamforming
Decay (organic)
Noise pollution
Railroad transportation
Railroads
Rails
Regression analysis
Separation
Source separation
Wheels
Aerodynamic noise
Certification methods
Controlled conditions
Experimental methods
Measurement-based methods
Railway noise
Rolling noise
Transfer Path Analysis
Vibrations (mechanical)

http://resolver.tudelft.nl/uuid:06dd640b-370c-403f-a7ab-1f2e7fef2b6f

807272

Elsevier Ltd

0003-682X

Applied Acoustics, 140, 48-62

article