关键词: 制动噪声;可靠性;随机参数;区间参数;灵敏度

Abstract: To suppress the brake noise of automotive disc brake systems, a reliability analysis method for vibration stability of automotive disc brake systems with hybrid uncertain parameters is presented. The method is based on the theories of reliability analysis, response surface methodology(RSM) and finite element complex eigenvalue analysis techniques. In the proposed method, parameter uncertainties are introduced to the vibration stability analysis model of an automotive disc brake system, random and interval parameters are used to describe the uncertainties, and response surface approximation models of the unstable eigenvalue are created, then the vibration stability can be analyzed by the parameterized models. A reliability analysis of a float caliper disc brake system model described with random and interval parameters is carried out, by using the proposed method. Vibration stability and parameter sensitivities are calculated by Monte Carlo method, and the results show that it can improve the vibration stability and reduce the generation of brake noise of a brake system effectively and reliably under uncertainty conditions, while improving the support stiffness of back plate. Reference value is provided for the suppression of brake noise in engineering.

Key words: brake noise;reliability;random parameters;interval parameters;sensitivity