制动闸片摩擦块孔结构对盘-块界面粘滑振动的影响

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (11) : 94-101.

论文

王权1,2，王志伟1,2，莫继良1,2，范志勇1,2，周仲荣1,2

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Effects of hole structure of brake pad friction block on stick-slip vibration of disc-block interface

WANG Quan1,2, WANG Zhiwei1,2, MO Jiliang1,2, FAN Zhiyong1,2, ZHOU Zhongrong1,2

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摘要

制动闸片摩擦块多采用孔结构以改善界面摩擦磨损行为及热分布特征。为进一步研究制动闸片摩擦块孔结构与盘–块界面粘滑振动特性的关系，通过开展摩擦学试验，分析了有孔和无孔摩擦块对界面粘滑振动的影响，并辨识了相应的Stribeck模型参数以描述盘–块界面间的摩擦系数特征。然后，建立了盘–块摩擦系统数值模型，基于辨识的Stribeck模型参数并结合理论分析，探讨了粘滑振动的关键影响因素，揭示了摩擦块孔结构对界面粘滑振动的作用机理。结果表明，摩擦系数–相对速度负斜率特征造成的负阻尼效应向系统输入能量，导致了系统的不稳定及粘滑振动。动、静摩擦系数的差值越大，负阻尼效应越强，系统粘滑振动强度及不稳定程度更高。相比无孔摩擦块，有孔摩擦块可通过孔结构调整界面摩擦特征，使动、静摩擦系数的差值减小，从而有效抑制界面粘滑振动强度，提高系统的稳定性。

Abstract

The perforated structure is widely adopted on the surface of the brake pad friction block to improve interfacial friction, wear behaviors and heat distribution characteristics. To further investigate the relationship between the perforated structure of the brake pad friction block and stick–slip vibration of the disc–block interface, in this research, the tribological experiments are conducted to analyze the stick–slip vibration respectively affected by perforated and unperforated friction blocks. The Stribeck model parameters are identified to characterize the coefficients of friction of the disc–block interface. Further, a numerical model of the disc–block friction system is constructed. Based on the identified Stribeck model parameters and the theoretical analysis, the key influence factors of stick–slip motion is discussed and the mechanism of the perforated structure of the friction block on stick–slip vibration is revealed. The results show that the negative damping effect generated from the negative friction–velocity slope continuously inputs energy into the disc–block friction system, causing the instability and stick–slip vibration of the system. A greater difference between the static and kinetic coefficients of friction results in a stronger negative damping effect, leading to more obvious stick–slip vibration and worse stability of the system. The difference between the static and kinetic coefficients of friction for the perforated friction block is less than that for the unperforated friction block through regulating the interfacial friction characteristics, thereby effectively reduces stick–slip vibration of the disc–block interface and improves the system stability.

导出引用

王权1,2，王志伟1,2，莫继良1,2，范志勇1,2，周仲荣1,2. 制动闸片摩擦块孔结构对盘-块界面粘滑振动的影响[J]. 振动与冲击, 2024, 43(11): 94-101

WANG Quan1,2, WANG Zhiwei1,2, MO Jiliang1,2, FAN Zhiyong1,2, ZHOU Zhongrong1,2. Effects of hole structure of brake pad friction block on stick-slip vibration of disc-block interface[J]. Journal of Vibration and Shock, 2024, 43(11): 94-101

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