In this paper, a mass-spring-friction oscillator subjected to two harmonic disturbing forces with different frequencies is studied for the first time. The friction in the system has combined Coulomb dry friction and viscous damping. Two kinds of steady-state vibrations of the system—non-stop and one-stop motions—are considered. The existence conditions for each steady-state motion are provided. Using analytical analysis, the steady-state responses are derived for the two-frequency oscillating system undergoing both the non-stop and one-stop motions. The focus of the paper is to study the influence of the Coulomb dry friction in combination with the two frequency excitations on the dynamic behavior of the system. From the numerical simulations, it is found that near the resonance, the dynamic response due to the two-frequency excitation demonstrates characteristics significantly different from those due to a single frequency excitation. Furthermore, the one-stop motion demonstrates peculiar characteristics, different from those in the non-stop motion.
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October 2002
Technical Papers
Two-Frequency Oscillation With Combined Coulomb and Viscous Frictions
Gong Cheng, Research Fellow,
Gong Cheng, Research Fellow
Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada, M5S 3G8
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Jean W. Zu, Associate Professor
Jean W. Zu, Associate Professor
Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada, M5S 3G8
Search for other works by this author on:
Gong Cheng, Research Fellow
Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada, M5S 3G8
Jean W. Zu, Associate Professor
Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada, M5S 3G8
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received August 2001; revised May 2002. Associate Editor: R. P. S. Han.
J. Vib. Acoust. Oct 2002, 124(4): 537-544 (8 pages)
Published Online: September 20, 2002
Article history
Received:
August 1, 2001
Revised:
May 1, 2002
Online:
September 20, 2002
Citation
Cheng, G., and Zu, J. W. (September 20, 2002). "Two-Frequency Oscillation With Combined Coulomb and Viscous Frictions ." ASME. J. Vib. Acoust. October 2002; 124(4): 537–544. https://doi.org/10.1115/1.1502670
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