摘要
为研究箱体、轴和花键联轴器的结构柔性对齿轮啮合刚度和传动系统动力学响应的影响,对比不同建模方式之间的差异,文中以功率三分支减速器为研究对象,建立了全柔体耦合动力学模型以及将不同部件考虑为刚性的动力学模型,采用时域和频域分析方法,研究了结构柔性对齿轮啮合刚度和传动系统动力学响应的影响规律。研究结果表明:部件柔性对齿轮啮合刚度的影响可以忽略;箱体柔性对系统振动特性影响较大,尤其当箱体模态与啮频重合或接近时,共振会使系统振动响应幅值显著增大;忽略轴的柔性可能导致部分啮频谱线丢失;花键联轴器柔性仅影响其连接轴的振动特性,对系统其他部分的振动响应影响较小。因此根据分析目的的不同,需要采用不同的分析模型。分析啮合刚度时,仅需要建立刚体模型;而分析系统振动特性时,则需要使用全柔体模型。
To investigate the effect of structural flexibility of the housing,shaft,and spline coupling on the meshing stiffness of the gear and dynamic response of the powertrain system and compare the differences between different modeling methods,a power tri-branching reducer was taken as the object,and a fully flexible coupled dynamics model was established,as well as dynamic models considering different components as rigid.The influence of structural flexibility on meshing stiffness of the gear and dynamic response of the powertrain system was studied using time domain and frequency domain analysis.The results show that the effect of structural flexibility on meshing stiffness of the gear can be ignored;the flexibility of the housing has a significant impact on the vibration characteristics of the system,especially when the housing mode coincides or approaches the mesh frequency;the resonance makes the vibration response amplitude of the system significantly increase;ignoring the flexibility of the shaft may result in the loss of spectral lines at certain mesh frequencies;the flexibility of a spline coupling only affects the vibration characteristics of its connecting shaft and has a small impact on the vibration responses of other components of the system.Therefore,different analysis models need to be used for different analysis purposes.When analyzing meshing stiffness,only a rigid body model needs to be established.When analyzing the vibration characteristics of the system,it is necessary to use a fully flexible model.
作者
严海
文立华
曹浩
宋文
YAN Hai;WEN Lihua;CAO Hao;SONG Wen(School of Astronautics,Northwestern Polytechnical University,Xi’an 710077,China;The 705 Research Institute,China Shipbuilding Industry Corporation Limited,Xi’an 710077,China)
出处
《水下无人系统学报》
2025年第4期630-637,共8页
Journal of Unmanned Undersea Systems
关键词
功率三分支减速器
啮合刚度
振动响应
结构柔性
power tri-branching reducer
meshing stiffness
vibration response
structural flexibility
