Journal of Lanzhou University of Technology ›› 2024, Vol. 50 ›› Issue (4): 50-54.

• Mechanical Engineering and Power Engineering • Previous Articles     Next Articles

Stability analysis of drum brake based on interval parameters

HE Ning, ZHANG De-long, ZHANG Qing-hua   

  1. Gansu Institute of Mechanical and Electrical Engineering, Tianshui 741000, China
  • Received:2022-05-25 Online:2024-08-28 Published:2024-08-30

Abstract: To suppress brake squeal, a stability and reliability analysis of drum brake with interval uncertainty parameters is presented based on the response surface method, finite element complex eigenvalue analysis, and theories of reliability. In the proposed method, Young’s modulus of the friction plate, brake shoe, and brake drum is treated as uncertain parameters, with the interval parameters describing the uncertainties in the braking system. Then, a response surface approximation model of the coefficient with interval uncertainty parameters is built up in a drum brake, achieving model parameterization for brake stability analysis. Furthermore, by combining interval analysis with reliability analysis, the drum brake system model uses the proposed method, the statistical regularities of the drum brake system with the uncertainty of Young’s modulus are analyzed, and the results show that enhancing the control over the Young's modulus of the brake shoe and friction plate can improve the vibration stability of a brake system effectively and reliably under uncertainty conditions. Reference value is provided for the suppression of brake noise in engineering.

Key words: brake squeal, interval parameters, stability, complex eigenvalue, response surface

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