随着数控机床、精密仪器等高新科技的快速发展，滚珠丝杠的缺陷越来越明显地表现出来。例如：在超高速运转过程中，系统刚度不足、噪声大、振动大等。在某些关键行业它已经不能满足科研人员的需求，这就需要一种新型传动机构地出现，于是行星滚柱丝杠开始走进人们的视野。本文在广泛参考国内外文献的基础上，对行星滚柱丝杠进行了设计、仿真以及有限元分析，具体内容如下： 首先，根据行星滚柱丝杠的工作原理、结构特点以及各部件之间的运动关系建立相关参数的数学模型；对建立的数学模型进行编程，并使用MATLAB的GUI设计对其相关参数进行界面设计；对设计出的相关参数使用UG软件建立三维模型。其次，从分析行星滚柱丝杠接触轨迹的位置入手，建立其相对滑动速度数学模型；使用MATLAB的GUI设计对其数学模型进行仿真分析，最终得出其滑动特性曲线图。再次，根据赫兹接触理论，结合分析滚珠丝杠轴向接触变形与轴向接触刚度的方法，建立行星滚柱丝杠的轴向接触刚度与轴向接触变形数学模型；在规定的工作载荷下，通过其数学模型计算其轴向接触变形以及轴向接触刚度，并与同规格滚珠丝杠的轴向接触刚度进行对比；通过MATLAB的GA求解器对行星滚柱丝杠的轴向接触刚度进行最优化求解；在规定的工作载荷下，计算最优求解后其轴向接触变形以及轴向接触刚度，并与最优求解前的轴向接触刚度进行对比。最后，使用HYPERWORKS软件对最优求解前后行星滚柱丝杠的轴向接触变形量进行有限元分析，并求得相对应的轴向接触刚度；将最优求解前后的有限元分析结果与理论结果进行对比，得出理论模型的准确性。 本研究成果为行星滚柱丝杠滚滑特性分析、系统刚度研究以及产品设计与研制提供了理论依据和技术参考，并为后续行星滚柱丝杠的深入研究奠定了理论基础。

With the rapid development of NC machine tool, precision instruments and other high-tech, the defect of Ball Screw is increasingly obvious. For example, in the process of high-speed operation, system stiffness is insufficient, high noise and vibration, and so on. In some key industries, it cannot meet the needs of scientific research personnel, which is necessary for a new type of transmission mechanism, so the planetary roller screw began to come into the mind of people. Based on extensive literature review at home and abroad, the present study conducted the planetary roller screw design, simulation analysis and finite element analysis. The specific contents are as the following. First of all, according to the working principle of planetary roller screw, structure characteristics and movement relationship among every components to establish the mathematical model of related parameters; To establish the mathematical model of programming, and to use the MATLAB GUI to design interface related parameters ; To design the related parameters of using UG software to create 3D model. Secondly, from the analysis on the planetary roller screw to track the location of the contact, the relative sliding speed mathematical model is set up; Using MATLAB GUI to simulate for the mathematical model and concluded the sliding characteristics curve. Thirdly, according to Hertz contact theory, combining with the analysis of ball screw axial deformation and axial contact stiffness method, to establish the planetary roller screw axial contact stiffness and axial deformation mathematical model; Under the rules of work load, using mathematical model to calculate the axial deformation and axial contact stiffness, and it was compared with the same specifications of the ball screw axial stiffness; Using GA solver to calculate axial contact stiffness of planetary roller screw optimization algorithm; Under the rules of work load, using optimal mathematical model to calculate the axial deformation and axial contact stiffness, and it was compared with the no optimal axial stiffness; Finally, using HYPERWORKS software to analyze finite element for optimal solution before and after the planetary roller screw axial contact deformation, and to get corresponding axial contact stiffness; To compare the optimal solution before and after of the finite element analysis results with the theoretical results to prove the accuracy of the theoretical model. The results of present study provided the theoretical basis and technology reference for the planetary roller screw rolling slip characteristics, system stiffness analysis and product design and development provides and laid the theoretical foundation for the further study of the planetary roller screw.