车辆变速器齿轮轴系和箱体动力学耦合研究

A Research on Dynamics Coupling Between Gear Shafts and Housing in a Vehicle Transmission

为定量分析变速器齿轮轴系动态特性和箱体弹性变形的相互影响,本文中建立了车辆变速器齿轮轴系和箱体动力学耦合模型并进行求解。首先,以某履带式车辆变速器为对象,采用有限元分析和试验方法探明箱体的弹性特征,提出变速器动力学耦合的方法,建立包含弹性箱体的变速器动力学耦合模型;接着对稳态工况下变速器箱体的变形和箱体变形状态下齿轮轴系动态特性的变化进行仿真;最后通过实车道路试验,测试了箱体危险区域的振动加速度,验证了所建变速器动力学耦合模型的正确性,完善了变速器动力学耦合性能的预测方法。

To quantitatively analyze the interaction between the dynamics characteristics of gear shafts andthe elastic deformation of housing of transmission,a dynamics model for the coupling between gear shafts and hous-ing of vehicle transmission is set up and resolved in this paper. Firstly,with the transmission of a tracked vehicle as object,the elastic features of its housing is investigated by both finite element analysis and test,a method of dynamic coupling of transmission is proposed,and a dynamically coupled model for the transmission with elastic housing is built. Then a simulation is conducted on the deformation of housing under steady condition and the changes in dynamic characteristics of gear shafts under the deformed state of housing of transmission. Finally a real vehicle road test is performed to measure the vibration accelerations at the dangerous areas of housing,verifying the correctness of the dynamically coupled model for transmission built and perfecting the prediction method of coupled dynamic performance of transmission.