Practical contact filter for rolling noise using 2-D FFT

TY - CONF

T1 - Practical contact filter for rolling noise using 2-D FFT

AU - Yang, Jiannan

N1 - Publisher Copyright: © 2015 by ASME.

PY - 2015

Y1 - 2015

N2 - Railway rolling noise prediction models often consists of three parts, the vehicle, the track and the contact part. The finite contact area is known to have a filtering effect of surface roughness excitation, of which the wavelengths comparable or shorter than the contact length tends to filtered. Both analytic and numerical models are available to process the measured roughness to take account of this filtering effect on rolling noise. However, the analytical models offer physical insights but only give coarse approximation while the numerical models are much more detailed but too computational demanding for practical usage. Here in this paper a practical approach using 2-D FFT is studied intending to fill this gap. By regarding the surface curvatures of wheel and rail as profile window and considering the weighting effect at different positions within this window, the contact filtering can be considered as a weighted moving windowing process and can be studied using 2-D FFT. By using 2-D FFT, the window shape, size and weighting can be varied easily for different cases. This is shown to be a very straightforward and practical approach, as compared to both analytical and 3D contact methods.

AB - Railway rolling noise prediction models often consists of three parts, the vehicle, the track and the contact part. The finite contact area is known to have a filtering effect of surface roughness excitation, of which the wavelengths comparable or shorter than the contact length tends to filtered. Both analytic and numerical models are available to process the measured roughness to take account of this filtering effect on rolling noise. However, the analytical models offer physical insights but only give coarse approximation while the numerical models are much more detailed but too computational demanding for practical usage. Here in this paper a practical approach using 2-D FFT is studied intending to fill this gap. By regarding the surface curvatures of wheel and rail as profile window and considering the weighting effect at different positions within this window, the contact filtering can be considered as a weighted moving windowing process and can be studied using 2-D FFT. By using 2-D FFT, the window shape, size and weighting can be varied easily for different cases. This is shown to be a very straightforward and practical approach, as compared to both analytical and 3D contact methods.

UR - http://www.scopus.com/inward/record.url?scp=84947584558&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84947584558

T2 - 44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015

Y2 - 9 August 2015 through 12 August 2015

ER -