209 自転車用ディスクブレーキの鳴き・ビビリ現象に関する解析的研究

概要

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Squeal and chatter phenomena were generated in a bicycle disc brake. The squeal was in-plane unstable vibration in the direction of the disc surface, caused by the dry friction with negative slope with respect to the relative velocity generated in the vibrating system including brake unit, spokes and hub. According to the experiments, the chatter was generated in a certain limited range of high temperature, and was the other frictional nonlinear vibration in which the squeal and the out-of-plane unstable vibration of the disc due to Coulomb friction were combined together through the internal resonance relationship between out-of- plane and in-plane vibrations caused by the temperature increase of the disc during braking. This paper deals analytically with the generation mechanism and the criterion of whether or not the squeal occurs, then they determine numerically whether the chatter occurs in a bicycle disc brake in terms of the nonlinear analysis.
2009-08-03