Influence of unsymmetrical brake pressure on the low frequency squeal of an automobile brake

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (2) : 297-304.

WU Yidong, CHEN Jingyan, YU Jiahao

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Abstract

Aiming at the problem of automobile brake squeal, the finite element model of automobile brake was established and the complex modal numerical simulation was carried out under asymmetrical and symmetrical brake pressure based on the energy feed-in method. The results show that the relative feed-in energy of the coupling subsystem can reflect the mode shape of the components. When the feed-in energy of the dual coupling subsystem is close to zero, the complex mode cannot be excited at the corresponding frequency. Symmetrical brake pressure can effectively reduce the relative feed-in energy of the piston caliper, and make the complex mode of the brake take the higher-order out-plane vibration of the brake disc as the main mode, so as to improve the complex characteristic frequency from 3000Hz to 5300Hz.

Key words

Brake / Squeal / Brake pressure / Complex mode / Relative feed-in energy

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WU Yidong, CHEN Jingyan, YU Jiahao. Influence of unsymmetrical brake pressure on the low frequency squeal of an automobile brake[J]. Journal of Vibration and Shock, 2022, 41(2): 297-304

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