实现振动解耦的摩擦学行为模拟试验台设计方法  

Design Method of Tribological Behavior Simulation Experiment Device for Vibration Decoupling

作　　者：刘启昂 莫继良[1] 项载毓 陈伟[1] 张棋翔 周仲荣[1] LIU Qiang;MO Jiliang;XIANG Zaiyu;CHEN Wei;ZHANG Qixiang;ZHOU Zhongrong(School of Mechanical Engineering,Southwest Jiaotong University,Sichuan Chengdu 610031,China;School of Mechanical Engineering,Guangxi University,Guangxi Nanning 530004,China)

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]广西大学机械工程学院,广西南宁530004

出　　处：《摩擦学学报》2023年第11期1273-1284,共12页Tribology

基　　金：国家自然科学基金项目(51822508);牵引动力国家重点实验室自主课题(2020TPL-106);四川省科技计划项目(2020JDTD0012)资助。

摘　　要：摩擦学行为研究对认识界面摩擦磨损特征,揭示摩擦自激振动产生机理及演变规律,保证摩擦系统的可靠运行具有重要意义.目前的摩擦学行为模拟试验装置由于刚性连接方式对界面摩擦振动响应的干扰,难以精确开展摩擦学行为研究和材料磨损性能评估,亟需隔离摩擦界面与机械连接部件之间的耦合振动.为此,基于气浮轴承设计了1种可实现振动解耦的摩擦学行为模拟试验台,通过锤击试验以及与非振动解耦摩擦试验机的对比试验,测定并验证了试验台振动解耦功能的有效性.锤击试验表明,未充气状态下在气浮轴承轴套处检测到多个频率,而充气状态下仅有较低的单一频率存在.摩擦学对比试验发现,随着法向载荷或往复滑移频率的增加,振动解耦试验台测得的振动加速度均方根变化率线性增加,而非振动解耦试验机的振动加速度均方根变化率呈先增后减的趋势,存在明显差异.因此,该摩擦学行为模拟试验台成功实现了摩擦界面与机械连接部件之间的振动解耦,为进一步精确探究界面摩擦学行为的影响因素和演变规律、揭示摩擦自激振动产生机理以及在对比评估不同材料摩擦磨损性能时排除摩擦学设备的影响方面提供了新的思路及有效的手段.Researching on tribological behavior is of great significance for understanding the interfacial friction and wear characteristics,as well as revealing the generation mechanism and evolution manner of friction-induced vibration and ensuring the reliable operation of the friction system.Due to the disturbance of interfacial friction vibration response caused by the rigid connection of tribological behavior simulation experimental equipment,it is generally difficult to investigate the tribological behavior and evaluate material wear performance purely at the friction interface.Therefore,it is necessary to eliminate the coupled vibration between the frictional interface and the mechanical connecting component.For this purpose,a tribological behavior simulation experiment device which achieves vibration decoupling using air bearings was developed in this study.Hammer tests were carried out on the T-shaped air-bearing configuration of the loading system and the air-bearing stage of the drive system,respectively.A complete modal analysis of the vibration decoupled experimental device was conducted using finite element software,and the results were compared with hammer tests to fully illustrate the effectiveness of the vibration decoupled function of the experiment device.Finally,tribological comparative tests of “ plane-to-plane” contact were carried out on the vibration decoupled experimental device and a vibration coupled experimental device(CETR UMT-3) to further validate the vibration decoupled capabilities of the experimental device and to demonstrate the differences between vibration decoupled/coupled tribological test equipment.The hammer test showed that several natural frequencies were detected at the bushing of the air bearing in the deflated state,while only a low single frequency was found in the inflated state,being the natural frequency of the air-bearing bushing.The results of the finite element modal analysis revealed that the first mode of the experimental device was dominated by torsion in the vert

关 键 词：摩擦学行为 摩擦振动 振动解耦 气浮轴承 试验装置 

分 类 号：TH117.1[机械工程—机械设计及理论]