树脂基复合材料摩擦噪声特性研究  

Friction Noise Characteristics of Resin-Based Composites

作　　者：鄢枫宸 凤维民 宋晖[1] 胡献国[1] YAN Fengchen;FENG Weimin;SONG Hui;HU Xianguo(School of Mechanical Engineering,Hefei University of Technology,Anhui Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009

出　　处：《摩擦学学报（中英文）》2024年第6期811-821,共11页Tribology

基　　金：国家自然科学基金项目(52075141)资助。

摘　　要：树脂基复合材料被广泛应用于多种制动系统中,但其在摩擦过程中易产生严重的环境噪声污染.通过摩擦试验和有限元模拟方法,总结了不同试验条件下摩擦系数、摩擦力波动系数以及摩擦噪声有效声压级的变化规律,分析了摩擦噪声与摩擦界面稳定性之间的关系,揭示了酚醛树脂基复合材料摩擦噪声的产生机理,同时研究了温度对其摩擦学性能及摩擦噪声行为的影响.结果表明:摩擦系数和摩擦力波动系数随载荷、相对滑动速度以及温度的改变呈现出不同的变化趋势,摩擦噪声的有效声压级与摩擦力波动系数正相关,且噪声的自功率谱与摩擦界面振动自功率谱相吻合.摩擦噪声的产生归因于接触界面的不稳定振动,研究结果为树脂基复合材料摩擦噪声的控制及发生机理提供了一定的理论基础.Resin-based composites are extensively used in various braking systems due to their stable and sufficient coefficient of kinetic friction,good wear resistance,high yield,and low energy consumption.However,aside from their benefits,they can generate environmental noise pollution while undergoing friction.In this study,we investigated the relationship between the tribological properties of phenolic resin-based composites and their friction noise characteristics.Using the finite element analysis method,we deeply analyzed the connection between friction noise and unstable vibration of the friction interface,revealing the underlying mechanism of friction noise.Additionally,we conducted experiments to examine the tribological properties and friction noise behavior of phenolic resin-based composites under various temperature conditions.With the increase in rotational speed,a significant amount of heat generated by friction results in a quick rise in the temperature of the friction interface.The composite binder became soft,generating a considerable amount of abrasive debris accumulation,which then further promoted the formation of adhesive wear.The fluctuation of friction became increasingly apparent,detrimentally impacting the stability of the contact interface and causing a significant increase in effective sound pressure levels of frictional noise.In instances where the normal load was minimal,the contact pressure at the friction interface was also small.As a result,the shear adhesion between the micro-convex bodies was weak,leading to less energy being fed into the system,ultimately reducing the occurrence of frictional fluctuation and limiting the noise sound pressure level.When the normal load reached a certain threshold,abrasive debris produced by wear creates a fresh contact platform at the friction interface.This mitigated the wear on the friction interface to a certain extent,while also moderating and reducing the energy of frictional fluctuations.This led to a significant decrease in the frictional fluctuatio

关 键 词：摩擦噪声 有效声压级 摩擦力波动系数 不稳定振动 有限元模拟 

分 类 号：TH117.1[机械工程—机械设计及理论]