FRICTION-INDUCED PARAMETRIC RESONANCES IN DISCS: EFFECT OF A NEGATIVE FRICTION–VELOCITY RELATIONSHIP
✍ Scribed by H. Ouyang; J.E. Mottershead; M.P. Cartmell; M.I. Friswell
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 311 KB
- Volume
- 209
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
Parametric resonances are studied which occur when an elastic system is rotated around an annular disc with friction having a negative slope with velocity. The elastic system consists of two spring-dashpots, in the transverse and in-plane (circumferential) directions, and a common point mass. The complete arrangement is driven around the disc through the in-plane stiffness and damper. It is demonstrated that the effect of the in-plane system (including the negative friction-velocity relationship) is (i) to introduce additional parametric resonances which are destabilised by the transverse damper, and (ii) to reduce the regions of instability of the other resonances.