Some mechanisms of excitation of a railway wheel

Munjal, M. L. ; Heckl, M. (1982) Some mechanisms of excitation of a railway wheel Journal of Sound and Vibration, 81 (4). pp. 477-489. ISSN 0022-460X

Full text not available from this repository.

Official URL:

Related URL:


Railway wheel vibrations are caused by a number of mechanisms. Two of these are considered: (a) gravitational load reaction acting on different points of the wheel rim, as the wheel rolls on, and (b) random fluctuating forces generated at the contact patch by roughness on the mating surfaces of the wheel and rail. The wheel is idealized as a thin ring, and the analysis is limited to a single wheel rolling on a rail. It is shown that the first mechanism results in a stationary pattern of vibration, which would not radiate any sound. The acceleration caused by roughness-excited forces is much higher at higher frequencies, but is of the same order as that caused by load reaction at lower frequencies. The computed acceleration level (and hence the radiated SPL) caused by roughness is comparable with the observed values, and is seen to increase by about 10 dB for a doubling of the wagon speed. The driving point impedance of the periodic rail-sleeper system at the contact patch, which is used in the analysis, is derived in a companion paper.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:73645
Deposited On:07 Dec 2011 05:12
Last Modified:07 Dec 2011 05:12

Repository Staff Only: item control page