Research on braking noise caused by friction pad wear and its suppression measures
ZHANG Xuesong
JIAO Quanwei
LIU Xinxiang
Abstract：The wear of friction pads has a significant impact on braking noise.To investigate the in-fluence mechanism of different friction pad wear patterns on the braking noise of automotive disc brakes,this paper takes a ventilated disc brake as the research object and uses the complex eigenvalue method to analyze the free modal and the contact pressure distribution between the brake disc and the friction pads.Additionally,measures to suppress braking noise were proposed.The study reveals that friction pad wear leads to changes in natural frequencies and contact pressure,thereby increasing the noise propensity of unevenly worn friction pads.Slotting the friction pads provides the best noise sup-pression effect for new friction pads,with the tendency of instability index overall reduced by 53%compared to new friction pads without slots.Increasing the thickness of the backplate offers the best effect on suppressing braking noise of uniformly worn and unevenly worn friction pads.Compared to uniformly worn and unevenly worn friction pads without increased backplate thickness,the tendency of instability index reduced by 41%and 36%,respectively.
Keywords：disc brakecomplex eigenvalue analysisbraking noisewear and tearfree modalcon-tact pressure
Publication Date：2025-02-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 27-32,52 )