Abstract
Due to the complex geometry of a railway wheel, the shape of its modes may have to be properly considered to understand and predict the sound radiation directivity around it. A straight-web metro wheel is studied in this paper with a radial excitation. First, the near-field sound radiation at the natural frequencies is measured in experiments performed in a semi-anechoic room. The natural frequencies here were determined by modal test. The corresponding mode shape is calculated from a finite element (FE) model. A good agreement is found between measurements and simulations in terms of natural frequencies. Further, the relationship between mode shape and sound field near the wheel is determined. Second, a rotating semi-circular frame of radius 2 m centered at the center of the wheel is employed to measure the directivity pattern. The directivities of A-weighted total level, one-third octave bands and modes are recorded at a total of 667 measuring points. A radial mode (r, 2) and an axial mode (1, 2) are taken as examples to derive empirical equations of directivity pattern. A model developed by the boundary element (BE) method is found to simulate the directivity pattern more precisely than the derived equations.
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References
Remington, P.J.: Wheel/rail noise Part I: characterization of the wheel/rail dynamic system. Journal of Sound and Vibration 46(3), 359–379 (1976)
Wolde, T., van Ruiten, C.J.M.: Sources and mechanisms of wheel/rail noise: state-of-art and recent research. Journal of Sound and Vibration 87(2), 147–160 (1983)
Thompson, D.J.: Sound radiation from a vibrating railway wheel. Journal of Sound and Vibration 253(2), 401–419 (2002)
Thompson, D.J.: Railway Noise and Vibration: Mechanisms, Modelling and Means of Control. Elsevier (2009)
Zhang, X., Jonasson, H.: Directivity of railway noise sources. Journal of Sound and Vibration 293(2), 995–1006 (2006)
Zhang, X.: Directivity of railway rolling noise. In: Schulte-Werning, B., Thompson, D., Gautier, P.-E., Hanson, C., Hemsworth, B., Nelson, J., Maeda, T., de vos, P. (eds.) Noise and Vibr. Mit. Rail Trans. Sys. NNFM, vol. 99, pp. 426–432. Springer, Heidelberg (2008)
Zhang, X.: Modeling the directivity of wheel/Rail radiation using a circular/straight line of perpendicular dipole pairs. In: Maeda, T., Gautier, P.-E., Hanson, C.E., Hemsworth, B., Nelson, J.T., Schulte-Werning, B., Thompson, D., de Vos, P. (eds.) Noise and Vibration Mitigation for Rail Transportation Systems. NNFM, vol. 118, pp. 143–150. Springer, Heidelberg (2012)
Zhang, X.: Applicable directivity description of railway noise sources. PhD thesis. Chalmers University of Technology, Göteborg Sweden (2010)
Fang, R., Xiao, X.B., Jin, X.S., Wen, Z.F.: Effect of shapes on sound radiation from railway wheel. In: Proceedings of International Conference on Mechanical Engineering and Mechanics 2007, Wuxi, China (2007)
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Han, J., Xiao, X.B., Wang, R.Q., Zhao, X., Zhao, G.T., Jin, X.S. (2015). Study on the Sound Radiation Directivity of a Railway Wheel and the Relationship between Directivity and Mode Shape. In: Nielsen, J., et al. Noise and Vibration Mitigation for Rail Transportation Systems. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 126. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44832-8_16
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DOI: https://doi.org/10.1007/978-3-662-44832-8_16
Publisher Name: Springer, Berlin, Heidelberg
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