基于刚柔耦合模型的变速器敲击特性

为研究变速器齿轮传动系统的敲击振动特性,专门设计了一台只包含两个档位的试验变速器。以该试验变速器为研究对象,综合考虑各零部件连接关系、齿轮内部动态激励、发动机转速波动和负载激励、轴承刚度阻尼特性以及箱体的柔性化特性,运用LMS virtual lab软件建立变速器的刚柔耦合多体动力学模型,分析了变速器齿轮系统敲击的产生条件并给出敲击时间历程与各影响因素的理论表达式,最后基于刚柔耦合模型对敲击各影响因素进行系统的分析研究。研究结果表明,通过合理地设计齿轮系统参数可以把敲击控制在理想范围内。

Research on Characteristics of Transmission Rattle Based on Rigid-Flexible Coupling Model

In order to research the characteristics of the transmission gear rattle, a special test transmission containing only two stalls was designed. The test transmission considered the complex relationship between each part, internal dynamic excitation of gears, engine speed fluctuation and load incentives, bearing stiffness and damping characteristics, and flexible properties box. A transmission rigid-flexible coupling multi-body dynamics model was built in LMS virtual lab software. The condition of transmission gear system rattle was introduced, and an accurate expression of rattle time history and each factor was derived. Finally, each rattle factor was analyzed systematically based on the rigid-flexible coupling model. The results showed that the rattle can be controlled in the ideal range through rational design of the gear system parameters.