Abstract

Experimental tests and numerical simulations are performed to explore the influence of damping components with slotted surface structures in a friction system on the dynamic instability. Damping components with slots at different depths are designed, combined with a special tribological test apparatus to evaluate their ability to stabilize the friction system. The experimental results show that damping components with a slotted structure can dramatically reduce the vibration response of the system and the energy level at the dominant frequency, thus stabilizing the friction system. Specifically, the system containing shallow slots on the leading edge rather than the trailing edge can eliminate the tangential partial wear and show the greatest potential on reducing the unstable vibration, which can be further verified by finite element analysis. Moreover, it is found that the contact inclination angle between the disc and the pad plays an important role in the generation of instability of the system, which can be further explained through a two degree of freedom model with a contact inclination angle.

摘要

进行了实验测试和数值模拟，以探索摩擦系统中具有开槽表面结构的阻尼组件对动态不稳定性的影响。设计了具有不同深度槽的阻尼组件，并结合特殊的摩擦学测试装置来评估其稳定摩擦系统的能力。实验结果表明，开槽结构的阻尼元件可以显着降低系统的振动响应和主频处的能级，从而稳定摩擦系统。具体而言，前缘而不是后缘包含浅槽的系统可以消除切向偏磨损，并在减少不稳定振动方面表现出最大的潜力，这可以通过有限元分析进一步验证。