Analysis of Noise Radiated by High-Speed Railway Bridge

The train-track-bridge coupling vibration theory and boundary element method were applied to establish a calculation model for the noise radiated by a vibrating bridge. A 32 m simply supported PC-box girder serviced in Chengdu to Dujiangyan Railway in China was simulated as a case study. Its spectrum characteristics and factors that affect the sound pressure level (SPL) were analyzed. According to the analysis, a 3D plate element model is reasonable to reveal the local vibration characteristics of the bridge in dynamic analysis. The higher the train speed is, the more noise is radiated by the bridge, but it is not a monotone increase, and in some speeds it will culminate. Pier height has little effect on the sound field above the bridge, but it has a great effect on the SPL of the sound field beneath the bridge at the same height from the ground. Due to the ground absorption and reflection of sound waves, it should be paid attention to in calculating the noise radiated by a bridge structure.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 2849-2854
  • Monograph Title: ICTE 2011

Subject/Index Terms

Filing Info

  • Accession Number: 01458107
  • Record Type: Publication
  • ISBN: 9780784411841
  • Files: TRIS, ASCE
  • Created Date: Aug 19 2011 4:45PM