考虑阻尼和行星传动齿轮啮合刚度的动力传动系统动态特性

Dynamic Characteristics of Power-train System Considering Damping and Meshing Stiffness of Planetary Gears

基于阻尼、齿轮啮合刚度的动力传动系统动态特性研究,可以更加准确、全面获取动力传动系统的固有特性,为动力传动系统优化匹配和系统动力学参数优化设计奠定基础.基于拉格朗日方程建立考虑发动机、联轴器等部件的阻尼参数、行星传动齿轮啮合刚度扭振动力学模型.通过复模态求解,对动力传动系统固有模态(复特征值、复特征向量)的物理意义,以及阻尼对系统固有特性的影响进行了分析.创新性地提出了复模态振型的表示方法,理论计算分析证明阻尼对动力传动系统固有特性的影响不容忽视.考虑阻尼参数,可获取更加准确的动力传动系统固有特性计算结果,支撑动力传动系统开展优化匹配;动力传动系统行星排考虑齿轮啮合刚度,可提取行星排齿轮传动固有特性,为行星传动固有特性与齿轮自激励优化匹配奠定基础.考虑阻尼和齿轮啮合刚度的动力传动系统动态特性研究具有一定实用价值.

The dynamic characteristics of power-train system study based on damping and meshing rigidity of gears can acquire inherent characteristics of power transmission system more accurately and comprehensively, which lays a foundation for optimum matching of power transmission system and optimum design of system dynamic parameters. Based on Lagrange equation and considering engine, coupling and other parts, establish damping parameters and torsional vibration dynamic model of planetary gear meshing stiffness. By solving the complex mode, analyzing the physical meaning of the natural mode(complex eigenvalue, complex eigenvector) of the power transmission system and the influence of damping on the natural characteristics of the system.The expression method of complex mode vibration mode is put forward innovatively, the theoretical calculation and analysis prove that the influence of damping on the inherent characteristics of power transmission system can not be ignored. Considering the damping parameters, can obtain more accurate calculation results of the inherent characteristics of the powertrain, which supports the optimal matching of the power train Considering the meshing stiffness of gears, the inherent characteristics of planetary gear transmission can be extracted, which lays a foundation for the optimal matching between the inherent characteristics of planetary transmission and gear self excitation.The research on dynamic characteristics of power transmission system considering damping and gear meshing stiffness has certain practical value.