Identification of Contact Stiffness between Brake Disc and Brake Pads Using Modal Frequency Analysis

Abstract

Contact stiffness increases with brake pressure, which leads to an increase of the mode frequency of the brake disc. As the disc mode order increases, the contact stiffness first increases and then almost stays invariant, which makes a mode frequency change correspondingly. The dependence of contact stiffness on brake pressure and disc mode order could be one of the possible reasons why the current research on prediction of brake noise and vibration is inaccurate and unsatisfactory.