Non-reversible dry friction oscillator: Design and measurements

• Published in: Proceedings of the Institution of Mechanical Engineers. Part C, Journal of mechanical engineering science Vol. 213; no. 5; pp. 527 - 534
• Main Authors: Wiercigroch, M, Sin, V. W. T., Liew, Z. F. K.
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.01.1999; Mechanical Engineering Publications; SAGE PUBLICATIONS, INC
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Vibrations and mechanical waves; non-linear dynamics design; friction oscillator; measurements; Non linear oscillator; Vibration; Stick slip; Dynamic stability; Testing equipment; Irreversible process; Experimental study; Dry friction
• ISSN: 0954-4062; 2041-2983
• DOI: 10.1243/0954406991522752

Abstract A Coulomb oscillator with a variable normal force has been designed and manufactured to carry out a wide range of experimental dynamic analysis, especially the study of the non-reversibility of dry friction characteristics. The design choice was based on the criteria of accuracy of the mathematical model and flexibility in terms of parameter changes such as the natural frequency of the system, coefficient of friction and normal force. The system consists of a block mass attached to two coil springs and a dry frictional damper in which the friction force is varied by a pneumatic actuator. This allows a constant pressure between sliding surfaces to be maintained. The experimental set-up, the calibration procedure for the clamping device and typical results are presented. Experimental non-reversible dry friction characteristics are discussed.