Advertisement

Numerical Simulations of Propagation of Bogie Noise in 3D Field by Duhamel’s Transformation Using Transient Solutions Calculated by 2D-FDTD Method

  • M. Hiroe
  • S. Ishikawa
  • R. Shiraga
  • T. Iwase
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 118)

Summary

We applied a numerical technique to transform a two-dimensional (2D) solution to a three-dimensional (3D) solution based on Duhamel’s transformation method using the transient solution obtained by finite-difference time-domain (FDTD) simulation to calculate the propagation of bogie noise, which is the predominant noise from the lower part of a train. Different shapes of reflective barriers were used in this investigation, and the source model of bogie noise was treated as an array of incoherent line sources. To verify the 3D transformation results obtained using Duhamel’s method, we carried out an experiment using a 1/25 3D scale model of a reflective inverted-L barrier. The good agreement between the numerical and experimental results indicates that the 3D transformation technique is a useful tool for precisely predicting the sounds that propagate from incoherent line sources such as bogie noise sources. We also investigated several reflective barriers of different edge shapes and clarified the differences between the shielding effects of the barriers in both 2D and 3D transformed using Duhamel’s method.

Keywords

Transient Solution Octave Band Slab Track Noise Barrier Railway Noise 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Hothersall, D.C., Horoshenkov, K.V., Morgan, P.A., Swift, M.J.: Scale modeling of railway noise barriers. Journal of Sound and Vibration 234(2), 207–223 (2000)CrossRefGoogle Scholar
  2. 2.
    Abe, Y., Nagakura, K., Kitagawa, T., Murata, K.: A study on effective configurations of sound barriers for Shinkansen track. In: Proceedings of inter-noise 2005, pp. 1868–1876 (2005)Google Scholar
  3. 3.
    Hiroe, M., et al.: Numerical analysis on the shielding effects of noise barriers against bogie noise by Finite-Difference Time-Domain method. In: Proceedings of Inter-Noise 2007, in07_326, Istanbul, Turkey (2007)Google Scholar
  4. 4.
    Sakamoto, S.: Calculation of sound propagation in three-dimensional field with constant cross section by Duhamel’s efficient method using transient solutions obtained by finite-difference time-domain method. Acoust. Sci. & Tech. 30, 72–82 (2009)CrossRefGoogle Scholar
  5. 5.
    Hiroe, M., et al.: Numerical simulations of propagation of bogie noise using 2D-FDTD method, - Treatment of boundary conditions of railroad tracks, and applications of transformation results calculated by 2D-FDTD method to 3D results -. Technical Committee Meeting on Noise and Vibration, N-2010-02 (January 2010) (in Japanese)Google Scholar
  6. 6.
    Sakamoto, S.: Phase-error analysis of high-order finite difference time domain scheme and its influence on calculation results of impulse response in closed sound field. Acoust. Sci. & Tech. 28, 295–309 (2007)CrossRefGoogle Scholar

Copyright information

© Springer 2012

Authors and Affiliations

  • M. Hiroe
    • 1
    • 3
  • S. Ishikawa
    • 2
  • R. Shiraga
    • 2
  • T. Iwase
    • 3
  1. 1.Kobayasi Institute of Physical ResearchKokubunjiJapan
  2. 2.Research and Development Center of JR East GroupJapan
  3. 3.Faculty of Engineering, Department of ArchitectureNiigata UniversityJapan

Personalised recommendations