Prediction of High-Speed Train Equivalent Pass-By Duration

Abstract:

A prediction model was established for the high-speed train equivalent pass-by duration at a speed of 300 to 380 km?h-1, and the corresponding calculating program was written. Based on the test and analysis of high-speed train noise, the directivity index, multi-source model and travel time correction were utilized to adjust and improve the numerical study of dipole source acoustic radiation. The validity of the prediction model was checked against the 300 to 380 km?h-1 experimental results, which was in good agreement. The equivalent pass-by duration coefficient of high-speed trains increases gradually with the increase of speed and presents an opposite tendency at the near field and far field distance. The previous conclusion that the equivalent pass-by duration at the near field is equal to l/v is no longer true at high speed.