✦ LIBER ✦

FRICTION-INDUCED VIBRATION IN PERIODIC LINEAR ELASTIC MEDIA

✍ Scribed by C.M. JUNG; B.F. FEENY

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 250 KB
Volume: 252
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.2001.4027

No coin nor oath required. For personal study only.

✦ Synopsis

For a one-dimensional "nite elastic continuum with distributed contacts and periodic boundary conditions, the presence of unstable waves is investigated. The stability of the waves is evaluated and explanations for instabilities under a constant coe$cient of friction are provided. A negative slope in the coe$cient of friction as a function of sliding speed is not a necessary condition for the occurrence of dynamic instability. Dynamic instability occurs in the form of self-excited, unstable, travelling waves. The stabilizing e!ects of external and internal damping were studied. Low-and high-frequency terms of the travelling waves are stabilized by adding external and internal damping respectively. Responses corresponding to unstable eigenvalues can dominate the system response. It is presumed that this can lead to squeaking or squealing noise in applications.

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