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The Nonlinear Self-Excited Vibration Analysis of a Frictional Disc Brake by Use of Perturbation Methods

Akbari Parikhani, Mohsen | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57551 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Haddadpour, Hassan
  7. Abstract:
  8. The brake system is a key component to ensuring the safe driving and riding comfort of the vehicle, and the friction between the brake disc and the friction plate is the main source of vibration and noise. Therefore, in order to improve the stability of the braking system and reduce the generation of vibration, a one-degree-of-freedom nonlinear dynamics model was established, and using the Stribeck friction model and related parameters, the dynamic equation was solved by the Averaging- method. The time domain diagram and phase plane diagram of the brake disk during friction braking were obtained, and the vibration characteristics of both under different braking pressure, brake disc support stiffness, and brake disc support damping were analyzed. The results show that brake pressure is an important factor in triggering nonlinear vibration and increasing the brake Pressure will reduce the amplitude of system vibration but have no influence the time to enter the stable motion state, increasing the support stiffness brake disc will reduce the amplitude of system vibration but will extend the time to enter the stable motion state,and increasing the support damping brake disc will reduce the amplitude of system vibration but will shorten the time to enter the stable motion state
  9. Keywords:
  10. Disc Brakes ; Dynamic Analysis ; Averaging Method ; Nonlinear Vibration ; Comfort ; Nonlinear Dynamic Model

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