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THE INFLUENCE OF REFRACTION AND TURBULENCE ON RAILROAD NOISE

✍ Scribed by R. Makarewicz

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
173 KB
Volume
210
Category
Article
ISSN
0022-460X

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✦ Synopsis

Turbulence caused by train motion, heat radiation and wind eddies destroys the coherent nature of the ground effect. Due to upward refraction, only a certain segment of the track contributes to noise emission. Thus, geometrical spreading and refraction govern the process of noise propagation. Noise generation is modelled by a line source of point sources with dipole directivity.

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