齿轮系统中的动态强度及变刚度仿真

发布时间：2018-01-07 16:23

本文关键词：齿轮系统中的动态强度及变刚度仿真　出处：《电子科技大学》2011年硕士论文　论文类型：学位论文

【摘要】：随着科技的快速发展,特别是近几十年来,机械工业发生着日新月异的变化,其应用也越来越广泛,从传统的机床车辆等机械工程应用领域到如今的航天航空机器人等高精尖领域,人们对机械系统的要求也在不断变化,对其应用要求也越来越高。而齿轮传动系统作为机械工程中应用最为广泛的传动零件之一,因其功率范围大、传动效率高、传动比准确等特点,其应用范围也越来越广,人们对其要求也越来越高。特别是在高速重载以及高精密传动的环境下,要求传动系统能够承受冲击载荷以及保证传动的准确性。在这种情况下,工作环境对于齿轮的机械属性,特别是零件的强度及系统的刚度更是有着极高的要求,更是要求人们深入地分析传动系统的动态强度及系统的刚度变化情况,以保证其零件传动的平稳及可靠性。本论文对目前齿轮的国内外发展及研究现状进行了深入的调查研究,在目前计算机仿真技术发展水平的基础上,分析研究当前齿轮传动系统中的强度校核以及传动系统的刚度,并利用仿真手段,对齿轮的零件强度以及系统的刚度进行分析研究,其研究内容主要有: 1.对当前的基于柔性多体系统动力学的刚柔混合体的混合仿真方法进行了深入的研究,对其仿真过程中的不足提出改进,特别是针对不同仿真软件之间的网格节点映射问题、时变载荷文件的提取及其在有限元模型中的自动施加,以及求解过程的控制,简化了以往的混合仿真方法,提高了仿真计算的效率; 2.对于传统的静态齿轮强度校核进行了研究,并对动态工况下齿轮的动态强度进行了深入分析,根据改进的混合仿真方法对齿轮的动态强度进行校核,对齿轮的静强度校核及动态强度校核结果进行分析比较; 3.齿轮系统的变刚度理论分析研究,并利用有限元仿真方法对某型号的行星伺服减速器进行刚度分析,得出其系统的刚度变化情况,并利用行星伺服减速器的测试设备对仿真结果进行验证,得出其刚度变化趋势的一致性。
[Abstract]:With the rapid development of science and technology, especially in recent decades, the mechanical industry is changing with each passing day, and its application is more and more extensive. From the traditional mechanical engineering fields such as machine tools and vehicles to the advanced fields such as aerospace robots and so on, the requirements of mechanical systems are constantly changing. As one of the most widely used transmission parts in mechanical engineering, gear transmission system has the characteristics of large power range, high transmission efficiency, accurate transmission ratio and so on. The scope of its application is more and more extensive, and people demand it more and more, especially in the environment of high speed and heavy load and high precision transmission. It is required that the transmission system can withstand the impact load and ensure the accuracy of the transmission. In this case, the working environment has a very high requirement for the mechanical properties of the gear, especially the strength of the parts and the stiffness of the system. It is also necessary to analyze the dynamic strength and stiffness of the transmission system in order to ensure the stability and reliability of its parts. In this paper, the development of gears at home and abroad and the status quo of research have been deeply investigated and studied, on the basis of the development level of computer simulation technology. This paper analyzes and studies the strength check and the stiffness of the gear transmission system, and analyzes the strength of the gear parts and the stiffness of the system by means of simulation. The main research contents are as follows: 1. The current hybrid simulation method of rigid and flexible hybrid system based on flexible multi-body system dynamics is deeply studied, and the shortcomings in the simulation process are improved. Especially for the grid node mapping problem between different simulation software, the extraction of time-varying load file and its automatic application in the finite element model, as well as the control of the solution process, the previous hybrid simulation methods are simplified. The efficiency of simulation calculation is improved. 2. The traditional static gear strength checking is studied, and the dynamic strength of the gear under the dynamic condition is deeply analyzed, and the dynamic strength of the gear is checked according to the improved hybrid simulation method. The results of static strength check and dynamic strength check of gears are analyzed and compared. 3. The variable stiffness theory of gear system is analyzed, and the stiffness of a certain type of planetary servo reducer is analyzed by finite element simulation method, and the stiffness change of the gear system is obtained. The simulation results are verified by using the testing equipment of planetary servo reducer, and the consistency of stiffness variation trend is obtained.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41

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