Effect of high-frequency excitation on friction induced vibration caused by the combined action of velocity-weakening and mode-coupling. (9th January 2020)

• Record Type: Journal Article
• Authors: Sahoo, Pradyumna K; Chatterjee, Shyamal
• Is Part Of: Journal of vibration and control. Volume 26:Number 9/10(2020)
• Page Start: 735
• Page End: 746
• Publication Date: 2020-01-09
• Subjects: Stribeck instability -- mode-coupling instability -- method of direct partition of motion -- tangential high-frequency excitation -- normal high-frequency excitation; Vibration -- Periodicals; Damping (Mechanics) -- Periodicals; 620.3
• DOI: 10.1177/1077546319889866
• Languages: English
• ISSNs: 1077-5463

Abstract

The present article studies the effects of both tangential and normal high-frequency excitations on a two-degree-of-freedom moving-mass-on-belt which represents a minimal model incorporating both velocity-weakening instability (so-called Stribeck effect) and mode-coupling instability (so-called binary flutter). The method of direct partition of motion is employed for studying the characteristics of the system in slow time scale. Linear stability analysis is performed near the equilibrium point of the system for both with and without sinusoidal high-frequency excitation. It is observed that the instability can be suppressed by the tangential high-frequency excitation only for a specific range of strength of excitation. However, stability does not improve under normal high-frequency excitations, though amplitude of the self-excited oscillation can be controlled to some extent. Direct numerical simulations are carried out in MATLAB SIMULINK to validate the analytical predictions.