Influence of different relative position distributions on the stick-slip vibration of a two friction blocks braking system

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (22) : 217-224.

LIU Cuiping,ZHU Youguang,XIANG Zaiyu,OUYANG Huajiang*,MO Jiliang

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Abstract

The influence of relative positions of two circular friction blocks on the tribological behaviour and dynamic characteristics of a simplified and customized experimental brake system of a pads-on-disc configuration was studied. The contact stress distribution characteristics of the friction blocks were analyzed by using the finite element method, and the relationship between different the relative positions and interface contact behaviour, friction and wear, and stick-slip vibration was discussed. The results of comprehensive test and simulation showed that the different relative positions of the two friction blocks significantly affect their interface contact pressure distribution and the wear characteristics, resulting in different forms of stick-slip vibration. It was found that the surface wear of the two friction blocks oriented along the disc radius is slight, the contact pressure is relatively evenly distributed and the stick-slip vibration intensity is low. It was also found that a sensible arrangement of friction blocks can effectively suppress the stick-slip vibration at the friction interface, mitigate wear of friction blocks, reduce the oscillation of system components, and improve the stability of the friction system. This work contributes to an improved design of brakes for automobiles and trains (in particular, high-speed trains).

Key words

two friction blocks / stick-slip vibration / relative position / wear / contact stress

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LIU Cuiping, ZHU Youguang, XIANG Zaiyu, OUYANG Huajiang, MO Jiliang. Influence of different relative position distributions on the stick-slip vibration of a two friction blocks braking system[J]. Journal of Vibration and Shock, 2024, 43(22): 217-224

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