AERODYNAMIC NOISE GENERATED BY SHINKANSEN CARS

The noise value (A -weighted sound pressure level, SLOW) generated by Shinkansen trains, now running at 220–300 km/h, should be less than 75 dB(A) at the trackside. Shinkansen noise, such as rolling noise, concrete support structure noise, and aerodynamic noise are generated by various parts of Shin...

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Bibliographic Details
Published inJournal of sound and vibration Vol. 231; no. 3; pp. 913 - 924
Main Authors KITAGAWA, T., NAGAKURA, K.
Format Journal Article Conference Proceeding
LanguageEnglish
Published London Elsevier Ltd 30.03.2000
Elsevier
Subjects
Acoustics
Aeroacoustics and atmospheric sound
Aeroacoustics, atmospheric sound
Applied sciences
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Ground, air and sea transportation, marine construction
Physics
Railway transportation and traffic
Sound pressure level
Railway
Microphone
Sound level
Vibration
Acoustic signal
Noise reduction
Aerodynamic noise
Aerodynamics
Sound source
Rail
High speed train
Aeroacoustics
Tunnels
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Summary:The noise value (A -weighted sound pressure level, SLOW) generated by Shinkansen trains, now running at 220–300 km/h, should be less than 75 dB(A) at the trackside. Shinkansen noise, such as rolling noise, concrete support structure noise, and aerodynamic noise are generated by various parts of Shinkansen trains. Among these aerodynamic noise is important because it is the major contribution to the noise generated by the coaches running at high speed. In order to reduce the aerodynamic noise, a number of improvements to coaches have been made. As a result, the aerodynamic noise has been reduced, but it still remains significant. In addition, some aerodynamic noise generated from the lower parts of cars remains. In order to investigate the contributions of these noises, a method of analyzing Shinkansen noise has been developed and applied to the measured data of Shinkansen noise at speeds between 120 and 315 km/h. As a result, the following conclusions have been drawn: (1) Aerodynamic noise generated from the upper parts of cars was reduced considerably by smoothing car surfaces. (2) Aerodynamic noise generated from the lower parts of cars has a major influence upon the wayside noise.
ISSN:0022-460X
1095-8568
DOI:10.1006/jsvi.1999.2639