制动盘非光滑仿生表面对制动摩擦尖叫行为影响的研究  

Study on the influence of non-smooth bionic brake disc on the squeal instability of disc brake system

作　　者：袁琼[1] 唐鹏[1] 李仕生[1,2] Yuan Qiong;Tang Peng;Li Shisheng(Chongqing Industry Polytechnic College,Chongqing 401120,China;Chongqing Automotive Power System Testing Engineering Technology Research Center,Chongqing 401120,China)

机构地区：[1]重庆工业职业技术学院,重庆401120 [2]重庆市汽车动力系统测试工程技术研究中心,重庆401120

出　　处：《现代制造工程》2020年第9期62-69,共8页Modern Manufacturing Engineering

基　　金：重庆市教委科学技术研究资助项目(KJQN201903203,KJZD-K201803201)。

摘　　要：加工出3种非光滑仿生表面制动盘,即表面沟槽盘、表面圆坑盘和表面沟槽圆坑盘,利用有限元软件ABAQUS对3种非光滑仿生表面制动盘进行制动摩擦尖叫行为有限元分析,并与光滑制动盘进行对比。结果表明,制动器的振动模态主要表现为制动盘的面内和面外振动,并伴随有制动夹钳以及摩擦片的弯曲扭转运动。利用复特征值法计算系统尖叫倾向性系数后发现,制动盘表面经过非光滑仿生处理后,制动器的摩擦尖叫倾向性发生了明显改变,表面沟槽圆坑盘抑制尖叫的效果最佳,而表面沟槽盘在三者之中抑制尖叫的效果最弱。进一步采用瞬时动态分析对结果进行验证,结果表明:制动盘表面经过非光滑仿生处理后,系统振动加速度信号、弹性位移信号以及界面力信号的强度均有所降低,且表面沟槽圆坑盘在降低系统振动强度方面效果最为显著,系统稳定性得到明显提高;但是,由于沟槽和圆坑的棱边可能会形成应力集中区,因此可以采用抛光、打磨等方式对棱边进行一定处理,以提高表面使用寿命。Three kinds of non-smooth bionic surface were manufactured on the brake disc surface,namely:surface groove disc,surface pit disc and surface groove with pit disc.Finite element analysis was performed by using ABAQUS to study the relationship between these three kinds of brake discs and brake system stability.Results show that the vibration modes of the brake are mainly reflected as the in-plane and out-plane vibration of the brake disc,accompanied by the bending and torsional motion of the brake clamp and the brake pad.Complex eigenvalue analysis was used to calculate the Tendency of Instability(TOI)of brake system,it is found that the squeal tendency of the brake system has significantly changed after the non-smooth bionic surface treatment.Specifically,the surface groove with round pit disc has the best potential in improving the stability of brake system,while the surface groove disc has the weakest effect among them.In addition,transient dynamic analysis was performed to verify the above results,it is found that the vibration acceleration amplitude,elastic displacement amplitude and interface force strength were reduced after dealing with the disc surface,and the surface groove with round pit treatment shows the most effective in reducing the squeal instability of brake system.However,due to the edges of grooves and round pits may form stress concentration areas,which will cause the damage of the edges in a certain way,thus it is suggested that the polishing process can be used to improve the surface life.

关 键 词：制动盘 仿生学 制动摩擦尖叫 摩擦振动 有限元分析 

分 类 号：TH117.1[机械工程—机械设计及理论]