摘要
针对汽车制动噪声的抑制问题,基于区间不确定性分析,提出了一种汽车盘式制动器的稳定性分析与改进方法。该方法将制动器系统的摩擦因数、制动压力和磨损部件的厚度视为不确定性参数,并采用区间参数进行描述。以不稳定模态的阻尼比衡量系统的稳定性,将有限元复模态分析技术与响应面法相结合,建立了分析目标与系统参数间的隐式函数关系,实现了制动器稳定性分析模型的参数化。结合区间分析方法和可靠性分析方法,研究了某型车的盘式制动器系统的稳定性,分析了不确定性条件下制动器系统稳定性变化的统计规律,并从可靠性角度提出了改善系统稳定性的措施。该分析方法可为抑制制动噪声提供参考。
To suppress brake squeal,a stability analysis and improvement method of automotive disc brake system is presented based on interval uncertainty analysis. In the method proposed,friction coefficient,braking pressure and the thicknesses of wearing components are treated as uncertain parameters and described by interval variables. With the damping ratio of unstable modes as the indicator of system stability,and combining complex modal analysis with response surface method,the implicit function relationship between analysis objective and system parameters is established,achieving model parameterization for brake stability analysis. Furthermore,by combining interval analysis with reliability analysis,the disc brake stability of a vehicle is investigated,the statistical regularities of brake stability variation in uncertainty condition is analyzed,with the measures for improving brake system stability put forward from a perspective of reliability. The method proposed provides a reference for brake squeal suppression.
出处
《汽车工程》
EI
CSCD
北大核心
2016年第3期317-322,共6页
Automotive Engineering
基金
湖南省研究生科研创新项目(CX2013B143)
湖南大学汽车车身先进设计制造国家重点实验室自主课题(71375004)
长沙市科技计划重大专项(K1306007-11-1)资助
关键词
制动噪声
区间分析
稳定性
不确定性
复模态
brake squeal
interval analysis
stability
uncertainty
complex mode
