齿轮传动系统行星架模态仿真及其振动实验测试研究

Research on Modal Simulation of Planetary Gear Transmission System Frame and its Vibration Experiment

齿轮传动系统行星架振动特性对保证整个系统的安全运行具有重要作用。针对四级减速系统的行星架展开了动力学分析。在建立模态叠加模型的基础上,对行星架模态进行了建模分析,以及加速度振动信号实验测定。研究结果得到:前六阶模态的固有频率及相对应振型看出行星架主要表现为局部结构的振动与扭转,随着模态阶数的增高振型越明显。行星架的前六阶固有频率介于(625～1339)Hz之间,行星架最低固有频率大于最高啮合频率,避免了齿轮箱在运行时与行星架之间共振现象的发生。加速度振动信号经MED分解后的前二阶IMF分量进行切片双谱的分析得到模态混叠现象减少,信号成分较简单,这说明通过实验验证该传动系统行星架设计是合理的。

The planetary gear transmission system can ensure the safe operation of the whole system frame vibration characteristics. The planet carrier level 4 reduction system for dynamic analysis. On the basis of the model state superposition model, the modeling analysis was carried out on the planet carrier mode, and vibration acceleration signal measurement experiment are done. The results show that the first six order modal frequencies and corresponding mode shapes of see the planet carrier is mainly show the local structure vibration and the torsion, modal order as the increase of the number of modes, the more obvious. Planet carrier of the first six order natural frequency between(625~1339)Hz, planet carrier mesh lowest natural frequency is greater than the highest frequency, avoid resonance between the gear box with planet carrier when running. Acceleration vibration signals after MED-the EMD decomposition of second order before the IMF component section of the double spectrum analysis to get modal aliasing phenomenon is reduced, the signal component is relatively simple, indicating that the drive system is verified by experiment and further the design of the planet carrier is reasonable.