轮边三级减速系统非线性动力学特性分析

Analysis of Non-linear Dynamic Performance of Tertiary Wheel Gear System

以电动轮车辆新型行星齿轮传动三级轮边减速器为研究对象,对影响系统动力学特性的非线性因素进行分析。结合系统的结构特点,运用集中质量法建立纯扭转非线性动力学模型。并在推导构件相对位移的基础上,运用牛顿力学方程得到结构的运动微分方程。根据数学方程,基于Simulink搭建三级减速系统非线性分析模型,多级行星齿轮传动的齿轮副齿侧间隙、时变啮合刚度和综合啮合误差等均包含在模型中。结果表明:由于齿侧间隙、时变啮合刚度和综合啮合误差等因素的存在使系统表现出明显的非线性动力学特性,并在一定范围内使得振动响应更加复杂,跳跃现象更加明显;系统阻尼系数在一定范围内可以减小系统的振动振幅;新型三级系统较传统系统的振动幅度更大,变化频率更快,刚度、误差和阻尼的影响效果更明显;为此类研究提供参考依据。

Taking the new type tertiary wheel gear system reducer of planetary gear transmission in electric-wheeled vehicle as the research object, the non-linear factors affecting the dynamic characteristics of the system are analyzed. Combined with the structural characteristics of the system, the nonlinear dynamic model of pure torsion was built based on lumped mass method. On the basis of the relative displacement of the components, the differential equations of motion of the structure were obtained by using the Newtonian mechanics equation. According to the mathematical equation, the non-linear analysis model of the three stage reduction system based on Simulink is built, and the gear pair backlash, time -varying mesh stiffness and comprehensive engagement error were included in the model. The results show that the non-linear dynamic characteristics of the system are more complicated and the system damping coefficient can reduce the vibration amplitude of the system, and the system damping coefficient can be reduced to some extent. The system damping coefficient can reduce the vibration amplitude of the system. The system damping coefficient can reduce the vibration amplitude.