Experimental Determination of Pass-by Noise Contributions From the Bogies and Superstructure of a Freight Wagon

Beer, F.G. de; Verheij, J.W.

doi:10.1006/jsvi.1999.2551

Cited by 18 publications

(10 citation statements)

References 4 publications

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“…In particular, transfer functions from contact force to sound pressure can be measured directly using an instrumented hammer impacting on the wheel or rail surface or reciprocally by using a loudspeaker near the track [16]. The latter is preferred as it can overcome potential problems of poor coherence in direct measurements using an impact hammer.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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Assessment of measurement-based methods for separating wheel and track contributions to railway rolling noiseApplied Acoustics, https://doi.org/10. 1016/j.apacoust.2018.05.012 Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. AbstractThe 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.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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“…In each case measurements [1], up to 5 kHz, on a non-rolling bogie are shown. Figure 5 shows the point accelerance above the suspension point to axial and vertical excitation respectively.…”

Section: Finite Element Predictions (Bogie)mentioning

confidence: 99%

“…This agreement is much better than for the individual bogie sides and ends, except below 63 Hz where measurement limitations may exist. The radiation e$ciency values used [1] are very low at the lower frequencies where short-circuiting can occur around the beam-like elements.…”

Section: Finite Element Predictions (Bogie)mentioning

confidence: 99%

“…The response of the wagon has been calculated using the SEA model, with the force and moment at the bogie connection point set to the values equal to the equivalent forces calculated from the measurements [1]. The acoustic powers are assumed uncorrelated and are simply added together.…”

Section: The Prediction Of Sound Pressure Due To Operational Forcesmentioning

confidence: 99%

“…The comparison with the experimental "ndings [1] concentrates on the predicted response of the point and transfer accelerances on the bogie, and the response of the wagon to force and moment excitations at a location where the wagon connects to the bogie.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling the Vibrational Characteristics and Radiated Sound Power for a Y25-Type Bogie and Wagon

Ferguson

2000

Journal of Sound and Vibration

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Surface Transportation Noise and Vibration Sources and Control

2020

Engineering Acoustics

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Experimental Determination of Pass-by Noise Contributions From the Bogies and Superstructure of a Freight Wagon

Cited by 18 publications

References 4 publications

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

Modelling the Vibrational Characteristics and Radiated Sound Power for a Y25-Type Bogie and Wagon

Surface Transportation Noise and Vibration Sources and Control

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