增速箱系统动态激励下的响应分析

Response Analysis of Speed Increase Gearbox System in Dynamic Excitation

齿轮啮合动态激励是齿轮系统产生振动和噪声的基本原因 ,齿轮系统在内部动态激励下的响应分析 ,对齿轮系统的设计和使用具有重要的意义。针对增速箱系统 ,采用三维接触有限元法得出啮合齿对的时变刚度曲线 ,根据齿轮精度等级确定的齿轮偏差模拟得出齿面误差曲线 ,得出了刚度激励和误差激励。应用I -DEAS软件建立了增速箱有限元动力分析模型 ,分析计算出了增速箱的固有频率和箱体、传动轴的动态响应。结果表明 ,增速箱系统在使用中不会引起共振 ,且振幅不大 ,能满足系统的使用要求。

It is an essence reason that vibration and noises of gear system is rose by gear meshing dynamic excitation. The response analysis in inner dynamic excitation is important to the design and application of gear system. The time-variable stiffness curves of meshing teeth pairs are acquired by 3-D contact finite element method to speed increase gearbox , and the profile error curves is simulated by gear windage which is determined by gear precision rate. Stiffness excitation and error excitation can be obtained with it. Using the finite element analysis software (I-DEAS), the dynamic model of speed increase gearbox is established. Then the normal frequencies of whole gearbox are calculated, and the vibration responses of gearbox and transmission shafts are analysed. The results show that sympathetic vibration is not occurred in the use process of speed increase gearbox and the vibration swing is small. It is sufficient for systemic application demand.