Volume 43 Issue 3
Mar.  2024
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YUAN Qiong. Study on Thermal-mechanical Coupling Behavior of Disc Brake System Under Different Braking Modes[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(3): 446-456. doi: 10.13433/j.cnki.1003-8728.20220169
Citation: YUAN Qiong. Study on Thermal-mechanical Coupling Behavior of Disc Brake System Under Different Braking Modes[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(3): 446-456. doi: 10.13433/j.cnki.1003-8728.20220169

Study on Thermal-mechanical Coupling Behavior of Disc Brake System Under Different Braking Modes

doi: 10.13433/j.cnki.1003-8728.20220169
  • Received Date: 2021-10-18
  • Publish Date: 2024-03-25
  • Thermal-mechanical coupling behaviour of disc brake under three different braking modes, namely drag braking, emergency braking and slow braking, is analyzed by using the full thermal-mechanical coupling analysis method. The results show that under the drag braking mode, the temperature distribution of friction pads on both sides of the disc is inconsistent, which is caused by the different deformation forms of friction pads on both sides of brake disc. In addition, the vibration signals and contact force signals of the friction pad between the finger side and the piston side are obviously different. The friction-induced vibration of the pad on the finger side of the disc gradually becomes intensified, and a new vibration frequency is generated, while the vibration of pad on the piston side tends to be stable and the original vibration frequency disappears gradually. In the emergency braking mode, the temperature distribution characteristics of the friction pads on both sides of the brake disc are similar, which are diffused from the inlet friction zone to the outlet friction zone, but the temperature rise is not obvious due to the short time period of action. However, the vibration signals of the friction pads on both sides are totally different, especially that the pad on piston side generates visible and continuous self-excited vibration, and the new vibration frequency is generated. In the slow braking mode, although the outer diameters of the friction pads on both sides are the surface high temperature zone, the high temperature distribution on the surface of the piston pad presents the characteristics of ‘point-like distribution’ in the late braking period. The vibration signals of the friction pad on the finger side are different from those on the piston side. The vibration duration of the friction pad on the finger side is longer, while its vibration intensity is weaker than that on the piston side. The results of interface mechanical signal analysis confirm the conclusion. The results of this study confirm that the thermal-mechanical coupling behaviours of brakes are different under different braking modes.
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