同步带传动的动态性能研究

发布时间：2018-01-23 05:17

本文关键词： 同步带传动动态性能 RecurDyn 刚柔耦合系统　出处：《陕西科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着同步带传动向高带速、长距离、高负载的方向发展，其动态特性分析尤为重要。本文以现有同步带传动物理样机为研究对象，以柔性多体系统动力学原理为理论基础，利用RecurDyn软件建立了实体样机的虚拟样机模型并进行了动力学仿真分析，获得了多种动态参数。通过数据分析，根据同步带传动结构特点和动力特性，对同步带传动系统进行了优化设计，达到了减小振动和降低噪声的目的。这为实际同步带传动的设计、使用和生产提供了具体指导。论文系统总结了国内外同步带传动的发展，研究了同步带传动的结构和性能，给出了同步带静态性能评价和试验方法，分析了同步带传动受力情况和啮合多边形效应，建立了同步带传动的横向振动和纵向振动模型。基于柔性多体系统动力学理论，采用有限段方法对无限自由度柔性体进行离散化处理，结合虚位移原理和达郎伯原理，给出了自由柔性体的动力学方程一般形式，分析研究了建立刚柔耦合系统的建模方法，为同步带传动动力学模型及其动态仿真研究奠定了理论基础。基于有限段方法建立柔性多体系统动力学模型的理论，将同步带离散为刚性带元和柔性连接模型，在RecurDyn软件中建立了虚拟样机模型并进行了运动过程仿真分析，得到了需要的系统动态参数和动力学参数曲线。通过对动态数据的处理和分析，结合同步带传动结构特点和动力特性，分别从改善启动方式，避开激振频率，增设张紧装置，优化齿形的角度对同步带传动模型进行了优化设计。仿真结果表明，，优化设计方法可有效避免共振，减小振动，提高同步带传动运行平稳性。为使以后的研究更具一般性和接近实际，提出了在此虚拟样机基础上进一步要做的工作和研究方向。同步带传动虚拟样机的仿真结果表明，采用离散带元和柔性连接来建立系统模型的方法是可行的，也是合理的。论文给出了虚拟样机技术进行同步带传动可视化研究的一般方法和步骤。这是研究带传动的一种新方法，也为现实同步带传动的设计和使用提供了良好的解决方案。
[Abstract]:With the development of synchronous belt transmission in the direction of high belt speed, long distance and high load, it is particularly important to analyze its dynamic characteristics. In this paper, the physical prototype of synchronous belt transmission is taken as the research object. Based on the theory of flexible multi-body system dynamics, the virtual prototype model of solid prototype is established by using RecurDyn software and the dynamics simulation analysis is carried out. Through the data analysis, according to the structural characteristics and dynamic characteristics of synchronous belt transmission, the optimal design of synchronous belt transmission system is carried out. The aim of reducing vibration and noise is achieved, which provides concrete guidance for the design, use and production of actual synchronous belt transmission. This paper systematically summarizes the development of synchronous belt transmission at home and abroad, studies the structure and performance of synchronous belt transmission, and gives the static performance evaluation and test method of synchronous belt. The forces of synchronous belt transmission and the meshing polygon effect are analyzed, and the transverse and longitudinal vibration models of synchronous belt transmission are established based on the flexible multi-body system dynamics theory. The finite segment method is used to discretize the flexible body with infinite degree of freedom. The general form of the dynamic equation of the free flexible body is given in combination with the principle of virtual displacement and the principle of Darnberg. The modeling method of rigid-flexible coupling system is analyzed and studied, which lays a theoretical foundation for the dynamic model of synchronous belt transmission and its dynamic simulation. Based on the finite segment method, the dynamic model of flexible multi-body system is established. The synchronous band is discretized into rigid band element and flexible connection model. The virtual prototype model is established in RecurDyn software and the simulation analysis of the motion process is carried out. The system dynamic parameters and dynamic parameter curves are obtained. By processing and analyzing the dynamic data, combining with the characteristics of synchronous belt transmission structure and dynamic characteristics, the starting mode is improved to avoid the exciting frequency. The design of synchronous belt transmission model is optimized by adding tensioning device and optimizing tooth shape angle. The simulation results show that the optimal design method can effectively avoid resonance and reduce vibration. In order to make the future research more general and close to reality, the further work and research direction based on the virtual prototype are put forward. The simulation results of virtual prototype of synchronous belt drive show that the method of establishing system model by using discrete belt element and flexible connection is feasible. It is also reasonable. This paper gives the general method and steps of visual research of synchronous belt transmission based on virtual prototype technology, which is a new method to study belt transmission. It also provides a good solution for the design and application of real synchronous belt transmission.
【学位授予单位】：陕西科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.32

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