采煤机作为综采工作面的主要设备，其截割部所消耗的功率占采煤机功率的80％~90％。采煤机截割部行星齿轮传动系统是采煤机截割部重要的组成部分，其结构、参数的合理与否直接影响采煤机的生产率、传动效率、能耗和使用寿命。本文以采煤机截割部行星齿轮传动系统为例对其非线性振动问题进行了较深入的分析，对系统发生混沌的途径进行了分析，并对行星齿轮系统进行了动力学仿真及模态分析，从而为齿轮传动振动噪声的控制提供理论支持。本文完成的主要工作包括： (1)建立了采煤机截割部行星齿轮系统的间隙非线性动力学数学模型，研究了激振频率、啮合刚度、阻尼等参数对系统动力学特性的影响。 (2)在SolidWorks软件中建立了采煤机截割部行星齿轮传动系统的三维模型，通过对该模型进行干涉检查，直观验证了所建模型的正确性： (3)将所建三维模型导入到动力学分析软件RecurDyn中，对模型施加载荷、约束和接触，以多刚体动力学理论为基础，进行了动力学分析，得到截割部齿轮传动系统的动力学特性曲线，研究了采煤机截割部行星齿轮传动系统的动力学特性。 (4)利用有限元分析软件ANSYS Workbench对行星齿轮传动系统进行了整体模态分析，得到了传动系统的前20阶固有频率和振型，对齿轮的啮合频率进行了计算，将齿轮啮合频率和行星齿轮系统的固有频率进行了比较，检验了系统是否会发生共振。 本论文研究工作为采煤机截割部齿轮传动系统的设计和研究提供了一个合理的分析、评价依据，所得结论不仅对采煤机截割部传动系统的试制和性能评估具有重要的指导意义，而且对其它复杂机械设备的运动学、动力学分析及虚拟样机的建立具有一定参考价值。

Shearer is one of the main equipment in fully mechanized coal mining face, the power consumption of shearer cutting unit accounted for 80% -90% the entire Shearer power. The Planetary gear set is the major part of the shearer cutting unit. Reasonable or not structure and parameters of the Planetary gear set directly affect the productivity, transmission efficiency, energy consumption and service life of shearer. In this paper, shearer cutting unit of Planetary gear set, for example an in-depth nonlinear vibration analysis of the drive system of planetary gear. The way chaos occurs in the system is analyzed. The planetary gear system dynamics simulation and modal analysis are also studied to provide theoretical support for gear transmission noise and vibration control. We have done the following work: A clearance type nonlinear dynamic model of a 2K-H planetary gear train was presented, the influences of damping ratio，frequency, and stiffness on the dynamic behavior of the system were analyzed． The three-dimensional model of the shearer cutting planetary gear train is established in the Solid Works software. The correctness of the model is verified through interference checking to the model. The three-dimensional model is imported to the dynamic analysis software (recurdyn). Based on the theory of rigid body dynamics, dynamics analysis is carried out by imposing loads, constraints, and contact on the model. The dynamic characteristics curve of the drive system is obtained and the changes of the dynamic characteristics for the drive system of the planetary gear is studied. The overall modal analysis of the planetary gear train is completed with the finite element analysis software ANSYS Workbench. The first 20 modes and mode shapes of the drive system are obtained, and the gear mesh frequencies of the gears are calculated. The meshing frequency and the planetary natural frequency of the gear system vary widely thus the resonance does not occur. The correctness of the choice of material for each gear and structural design is verified. This work studied in this paper present a reasonable Analysis and evaluation foundation for the design and study of the drive system of the Shearer cutting part. The conclusions are of significant guidance not only to the prototype and performance evaluation of the Shearer cutting part drive system, but also to other complex machinery and equipment kinematics, dynamics analysis and the establishment of the virtual prototype.