牵引齿轮裂纹对机车齿轮箱箱体振动影响的仿真分析  

Simulation Analysis of Gear Crack Fault on Dynamic Performance of Gearbox of Locomotive

作　　者：许思思 黄冠华 XU Si-si;HUANG Guan-hua(CRRC Industrial Research Institute Co.,Ltd,Beijing 100070,China;Chengdu Xijiao Golden Detection Intelligence Technology Co.,Ltd,Chengdu Sichuan 610031,China)

机构地区：[1]中车工业研究院有限公司,北京100070 [2]成都西交金测智能科技有限公司,四川成都610037

出　　处：《机械研究与应用》2022年第4期71-74,共4页Mechanical Research & Application

摘　　要：为分析牵引齿轮裂纹故障下机车齿轮箱箱体的动态响应,首先建立齿轮副的有限元模型,得到正常工况和存在裂纹故障工况下齿轮的时变啮合刚度;其次,建立机车整车动力学模型,模型中包含齿轮传动系统,将时变的啮合刚度导入进行联合仿真。结果表明,裂纹故障能使齿轮箱箱体的振动增加,当裂纹深度>4 mm时,振动的幅值会显著增大,频谱的主频显示出齿轮副的啮合频率,箱体悬挂频率,牵引齿轮的转频及其倍频,通过监测这些频率,可以为齿轮传动系统的状态修提供决策依据。In order to analyze dynamic response of the locomotive gearbox case under the fault of the traction gear crack,firstly,the finite element model of the gear pair is established to obtain the time-varying meshing stiffness of the gear under normal and crack conditions.Secondly,the multi-body dynamics model of the locomotive is established,which includes the gear transmission system;and then the time-varying meshing stiffness is imported for co-simulation.The results show that the crack fault can increase the vibration of the gearbox casing.When the crack depth is greater than 4 mm,the amplitude of the vibration will increase significantly.From the frequency spectrum,it finds that the dominant frequencies include the meshing frequency,the suspension frequency,the rotating frequency of the traction gear and its harmonic components;by monitoring these frequencies,results can be provided to the decision-making for the condition-based maintenance of the gear transmission system.

关 键 词：机车 齿轮传动系统 箱体 断裂 振动 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]