总结前人研究工作的基础之上，建立了包含切向、轴向和扭转三个自由度的制动系统模型，通过数值计算，找到了系统的分岔与混沌现象，重点研究并分析了制动压力对制动系统动力学特性的影响，对认识非线性动力学对制动系统颤振的影响具有理论指导意义。
结果表明，在不考虑结构参数的情况下，随着制动压力的增长，系统交替出现周期和混沌运动，并在一定范围内周期不断减少，混沌运动逐渐增加，但是当制动压力增长到一定程度时，系统的混沌逐渐减少，直至消失，系统只进行周期振动。该发现对制动系统制动压力的匹配选择具有重要的理论指导作用。
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Abstract： A three-degree-of-freedom disc brake system model is established， and the friction between the brake disk and pad is calculated by using the stribeck friction model. The influence of brake pressure on dynamic characteristics of brake system is studied by numerical analysis. The results show that， with the change of brake pressure， the system shows the phenomenon of periodic vibration and chaotic vibration， and the size of brake pressure has a significant influence on the dynamic characteristics of the braking system.
Key words： three degrees of freedom; braking system; chaos; stick-slip; vibration
責任编辑 祁秀春