Open AccessThe Role of Damping and Definition of the Robust Damping Factor for a Self-Exciting Mechanism With Constant Friction
Author(s) -
Jean-Jacques Sinou,
Gregory M. Fritz,
L. Jézéquel
Publication year - 2006
Publication title -
journal of vibration and acoustics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.605
H-Index - 82
eISSN - 1528-8927
pISSN - 1048-9002
DOI - 10.1115/1.2730536
Subject(s) - instability , flutter , magnetic damping , damping torque , thermoelastic damping , damping ratio , constant (computer programming) , control theory (sociology) , vibration , viscous damping , loss factor , damping factor , mechanics , modal , physics , classical mechanics , structural engineering , engineering , materials science , computer science , acoustics , voltage , thermal , artificial intelligence , dielectric , aerodynamics , electrical impedance , direct torque control , control (management) , quantum mechanics , impedance matching , programming language , optoelectronics , meteorology , polymer chemistry , induction motor
International audienceThis paper presents a linear two-degree-of-freedom model in order to analyze friction-induced instabilities that are governed by modal interaction. The role of structural damping on flutter instability is undertaken, and the effects of the structural damping ratio between the stable and unstable modes are investigated in order to clarify and to explain the mechanical process of flutter instability. In certain conditions, it is demonstrated that the merging scenario and the unstable mode may change due to this structural damping ratio. Discussions not only demontrate the role of strutural damping and the associated mechanical process but also define the robust damping factor in order to avoid design errors and to reduce flutter instability
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