Effects of bending wave on measurement of rail vibration characteristics

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (1) : 151-156.

XIAO Junheng1, 2, YAN Ziquan2, SUN Linlin2, CUI Shukun2, LIU Haitao2

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Abstract

Aiming at effects of propagation and reflection of rail bending wave on measurement of rail vibration characteristics, the theoretical deduction of rail bending wave velocity was performed, and the testing of rail bending wave velocity was designed. The test verification was conducted for characteristics of propagation velocity of rail bending wave and velocity of its reflection wave. At the same time, effects of rail bending wave on measurement of rail vibration characteristics and measures were studied. Results showed that the wave velocity of rail bending wave is not a constant, but a function of frequency; different frequency components of rail bending wave propagate at different wave velocities, their reflection waves’ velocities are the same as incident waves’; when doing the rail structure vibration characteristics testing within a test segment with a finite length, effects of rial bending wave can’t be neglected; damping equipment installed at ends of rail can effectively restrain effects of reflection wave on measurement of rail vibration characteristics.

Key words

bending wave / railway track / rail / vibration characteristics / vibration testing

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XIAO Junheng1, 2, YAN Ziquan2, SUN Linlin2, CUI Shukun2, LIU Haitao2. Effects of bending wave on measurement of rail vibration characteristics[J]. Journal of Vibration and Shock, 2021, 40(1): 151-156

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