酚醛树脂基摩擦材料摩擦振动演化行为规律与机制研究  

Behavior and Mechanism of Evolution on Friction-Induced Vibration of Phenolic Resin-Based Friction Material

作　　者：侯鑫 杜军华 魏鹏[1] 李京洋 邬志蹦 李威 曹辉[1] 白鹏鹏 田煜[1] HOU Xin;DU Junhua;WEI Peng;LI Jingyang;WU Zhibeng;LI Wei;CAO Hui;BAI Pengpeng;TIAN Yu(State Key Laboratory of Tribology in Advanced Equipment,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;Jiangxi Huawu Brake Co,Ltd,Jiangxi Yichun 331100,China)

机构地区：[1]清华大学高端装备界面科学与技术全国重点实验室,北京100084 [2]江西华伍制动器股份有限公司,江西丰城331100

出　　处：《摩擦学学报（中英文）》2024年第10期1334-1344,共11页Tribology

基　　金：国家自然科学基金项目(52205206)资助。

摘　　要：酚醛树脂基摩擦材料与金属组成的摩擦副经长时间服役容易出现剧烈摩擦振动和辐射高频噪声,可能导致设备停机甚至损坏.本文中针对酚醛树脂基摩擦材料/球墨铸铁摩擦副在往复摩擦试验中的摩擦振动行为演化开展了系统研究.为不干扰摩擦系统,采用了激光多普勒测速仪对摩擦振动进行非接触式高精度测量.试验过程中摩擦系统逐步出现80和800 Hz的振动,与其固有频率重合.通过对周期性摩擦力、振动数据、磨损表面形貌和速度依赖性的综合分析,提出摩擦过程中的“黏-滑”行为是诱导摩擦振动及噪声产生和演化的关键因素.伴随“黏-滑”行为的摩擦功和弹性能变化以及界面间由材料黏着和脱附等行为导致的摩擦力波动分别是诱导摩擦系统产生80 Hz低频振动和800 Hz高频自激振动的主要原因.磨损过程中的材料转移和界面间磨粒堆积会导致高频振动能量逐步增加.本研究中通过揭示酚醛树脂基摩擦材料摩擦振动的产生机理和演化规律,为低噪声摩擦系统界面设计提供了理论参考.Severe friction-induced vibration is prone to occur in phenolic composite/metal pairs during long-term tribological service,while high-frequency noise is radiated,leading to equipment shutdown or even damage.The mechanism of friction vibration noise generation is relatively complex and has not yet been clearly explained in physics.In response to the friction-induced vibration behavior of phenolic resin composite,the reciprocating tribology tests consisting of phenolic composite/ductile iron friction pairs were designed.During the tribology tests,the friction force and vibration signals were collected and analyzed.To avoid interference with the friction system,a non-contact high-precision vibration measurement system based on laser doppler velocimetry was used.The test results showed that vibrations at 80 and 800 Hz gradually appeared,coinciding with its natural frequencies.Furthermore,the comparative analysis was conducted on the surface morphology of phenolic composite/metal pair before and after wear.The results indicated that the surface roughness significantly decreased after tribology test.The decrease in surface roughness was due to the continuous wear and material transfer of phenolic composite,resulting in the formation of transfer films with lower surface roughness.A lower surface roughness implied a larger real contact area,leading to further exacerbation of adhesive wear.Compared to abrasive wear,adhesive wear was more likely to induce higher-frequency interface vibration.By conducting a comprehensive analysis of periodic frictional force,vibration signal,wear surface morphology,and velocity dependence,the"stick-slip"behavior in the friction process was proposed as a key factor inducing frictional vibration and noise generation and evolution.The friction-induced vibration of phenolic composite/metal pair was generated by the unstable excitation during the"stick-slip"process on the moving interface.Essentially,it was caused by the transmission and superposition of high-frequency stress waves generated b

关 键 词：摩擦振动 噪声 酚醛树脂 黏-滑 材料转移 

分 类 号：TH117.1[机械工程—机械设计及理论]