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PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Analysis of the Vibration and Sound Radiation Characteristics of a Sprayed Damped Wheel with Different Damping Rings
M. Li1, X. Liu1, X. Zhou2, X. Sheng2, H. Shen1 and X. Jin2
1School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, China
M. Li, X. Liu, X. Zhou, X. Sheng, H. Shen, X. Jin, "Analysis of the Vibration and Sound Radiation Characteristics of a Sprayed Damped Wheel with Different Damping Rings", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 318, 2016. doi:10.4203/ccp.110.318
Keywords: sprayed damping wheel, natural frequency, damping ratio, mode shape, frequency response function, sound energy level.
This paper analyzes the vibration and sound radiation characteristics of a straight web railway wheel with and without sprayed damping and damping rings. The natural frequencies, damping ratios and frequency response function (FRF) are obtained through modal testing. The sound energy level (SEL) is obtained through the tests of sound radiation in the hemi-anechoic room, and the vibration characteristics are analysed. The analysis results show that both the FRF and the SEL of the damped wheel are reduced significantly if compared with the wheel without any damping treatment (the bare wheel). The overall SEL of the damped wheel with 12mm damping rings due to radial and axial excitations are, respectively, 10.9dB and 9.5dB lower than those of the normal one. The overall SEL of the damped wheel with 14mm damping rings due to radial and axial excitations are, respectively, 13.0dB and 13.0dB lower than those of the bare wheel.
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