新型变齿厚齿轮动态特性分析

发布时间：2018-01-23 06:33

本文关键词： 啮合刚度变齿厚齿轮动力学特性 LS-DYNA ADAMS　出处：《重庆大学》2014年硕士论文　论文类型：学位论文

【摘要】：课题来源于国家自然科学基金项目（50705100，51275538），基于不同变位的新型渐开线变齿厚齿轮——在调隙、精密传动、车辆动力传动等领域具有广泛应用前景。其刚度等动态特性参数是传动性能重要指标，对其展开深入研究具有重要的理论和实践意义。本文基于切向变位渐开线变厚齿轮原理和啮合特性基础上，对其刚度计算方法进行研究，并在此基础上开展仿真分析。本文主要内容包括： ①在比较常用齿轮刚度的计算方法的基础上，选用有限元方法对复合变位变厚齿轮进行刚度计算；对不同切向变位系数的复合变位变厚齿轮进行了刚度计算，，得到了刚度变化规律； ②在考虑复合变位变厚齿轮的刚度参数的条件下，利用集中参数非线性计算模型，研究复合变位变厚齿轮副的动力学特性；考虑齿侧间隙、时变啮合刚度等非线性因素，对其动力学响应和规律进行了计算研究，包括时变啮合刚度非线性和齿侧间隙非线性对系统响应的影响； ③建立复合变位变厚齿轮副非线性有限元模型，对正常啮合情况和有侧隙情况下变厚齿轮副啮合过程中的动态特性进行了仿真研究，得到了相应规律；并对仿真结果与集中参数法计算结果进行对比分析，表明两种计算结果规律基本一致； ④利用多体动力学方法，对复合变位变厚齿轮存在侧隙情况时，时变负载及时变转速对其动态传动精度的影响进行仿真研究。
[Abstract]:The subject comes from the project of National Natural Science Foundation of China (NSFC), which is based on the new involute gear with variable tooth thickness based on different translocation. Vehicle power transmission and other fields have a wide range of application prospects, its stiffness and other dynamic characteristics are important indicators of transmission performance. It is of great theoretical and practical significance to further study it. Based on the principle of tangential modified involute thickening gear and meshing characteristics, the stiffness calculation method is studied in this paper. The main contents of this paper are as follows: 1 on the basis of comparing the common calculation methods of gear stiffness, the finite element method is used to calculate the stiffness of composite gear with varying thickness. The stiffness of the composite thickening gear with different tangential modification coefficients is calculated and the change rule of stiffness is obtained. (2) under the condition of considering the stiffness parameters of the compound variable thickness gear, the dynamic characteristics of the compound variable thickness gear pair are studied by using the lumped parameter nonlinear calculation model; Considering the nonlinear factors such as tooth side clearance and time-varying meshing stiffness, the dynamic response and law are calculated and studied, including the influence of time-varying meshing stiffness nonlinearity and tooth side clearance nonlinearity on the system response. (3) the nonlinear finite element model of the composite variable thickness gear pair is established, and the dynamic characteristics of the thickened gear pair during the meshing process under the normal meshing condition and the side gap condition are simulated and studied, and the corresponding laws are obtained. The simulation results are compared with the results of the lumped parameter method, and the results show that the two results are basically the same. In this paper, the influence of time-varying load on dynamic transmission accuracy is simulated by using multi-body dynamics method in the presence of side gap of compound variable position and thickening gear, and the effect of time-varying load on the dynamic transmission accuracy is studied by using the method of multi-body dynamics.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH132.41

【参考文献】