带式输送机三维建模方法的研究
发布时间：2018-10-16 22:33
【摘要】：带式输送机作为典型的刚柔混合多体系统,不仅包含驱动系统的刚性运动,还包含输送带的粘弹性振动。输送带三维模型的准确建立是进行动态特性分析的基础。以前对输送带动态特性研究大都集中在纵向,随着虚拟样机技术的发展,对输送带横向和垂直方向的动态特性研究成为可能。本文首先阐述了输送带的基础振动理论,根据输送带自身的粘弹特性,建立带式输送机的动力学方程,并对输送带内的张力进行理论计算。研究多体动力学分析软件Recur Dyn带工具包中,两种基于不同多体理论的输送带建模方法。一种是基于多刚体动力学理论的Assembly建模方法,也是目前常用的三维建模方法;另一种是基于有限元柔性体理论的Shell建模方法,该方法结合了有限元方法和多体动力学理论,不仅面向带式输送机系统层面,而且擅长结构动力学分析。运用Recur Dyn中这两种建模方法,分别对输送带进行三维建模和仿真实验。论文首次使用带工具包中Shell模块对输送带进行三维建模。对比Assembly及Shell这两种建模方式下,仿真所需时间以及尾部滚筒速度、带速、张力、位移等重要动态参数。分析两种建模方式下的计算效率、与理论值相比的准确度。研究发现两模型都可以很好的反应输送带的动态特性,但相比Assembly模型,Shell模型计算效率更高,更接近实际情况,而且还可以计算除纵向速度、张力以外的垂直方向和带宽方向的动态参数。
[Abstract]:As a typical rigid-flexible hybrid multi-body system, belt conveyor not only includes the rigid motion of the drive system, but also includes the viscoelastic vibration of the conveyor belt. The accurate establishment of three-dimensional model of conveyor belt is the basis of dynamic characteristic analysis. With the development of virtual prototyping technology, it is possible to study the dynamic characteristics of conveyor belt in the horizontal and vertical direction. In this paper, the basic vibration theory of conveyor belt is introduced. According to the viscoelastic characteristics of belt itself, the dynamic equation of belt conveyor is established, and the tension in conveyor belt is calculated theoretically. This paper studies two kinds of conveyor belt modeling methods based on different multi-body theory in the multi-body dynamics analysis software Recur Dyn belt toolkit. One is the Assembly modeling method based on the multi-rigid body dynamics theory, the other is the Shell modeling method based on the finite element flexible body theory, which combines the finite element method and the multi-body dynamics theory. Not only facing the belt conveyor system level, but also good at structural dynamics analysis. Using these two modeling methods in Recur Dyn, the three-dimensional modeling and simulation experiments of conveyor belt are carried out respectively. In this paper, the Shell module in the belt toolkit is used to model the conveyor belt for the first time. Comparing with Assembly and Shell, the simulation time and the important dynamic parameters such as velocity, band velocity, tension and displacement of the tail cylinder are compared. The computational efficiency of the two modeling methods is analyzed and the accuracy compared with the theoretical values is analyzed. It is found that both models can well respond to the dynamic characteristics of conveyor belt, but compared with the Assembly model, the Shell model is more efficient and closer to the actual situation, and can also calculate the longitudinal velocity. Dynamic parameters other than the vertical direction and the bandwidth direction of the tension.
【学位授予单位】：上海师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH222
本文编号：2275833
[Abstract]:As a typical rigid-flexible hybrid multi-body system, belt conveyor not only includes the rigid motion of the drive system, but also includes the viscoelastic vibration of the conveyor belt. The accurate establishment of three-dimensional model of conveyor belt is the basis of dynamic characteristic analysis. With the development of virtual prototyping technology, it is possible to study the dynamic characteristics of conveyor belt in the horizontal and vertical direction. In this paper, the basic vibration theory of conveyor belt is introduced. According to the viscoelastic characteristics of belt itself, the dynamic equation of belt conveyor is established, and the tension in conveyor belt is calculated theoretically. This paper studies two kinds of conveyor belt modeling methods based on different multi-body theory in the multi-body dynamics analysis software Recur Dyn belt toolkit. One is the Assembly modeling method based on the multi-rigid body dynamics theory, the other is the Shell modeling method based on the finite element flexible body theory, which combines the finite element method and the multi-body dynamics theory. Not only facing the belt conveyor system level, but also good at structural dynamics analysis. Using these two modeling methods in Recur Dyn, the three-dimensional modeling and simulation experiments of conveyor belt are carried out respectively. In this paper, the Shell module in the belt toolkit is used to model the conveyor belt for the first time. Comparing with Assembly and Shell, the simulation time and the important dynamic parameters such as velocity, band velocity, tension and displacement of the tail cylinder are compared. The computational efficiency of the two modeling methods is analyzed and the accuracy compared with the theoretical values is analyzed. It is found that both models can well respond to the dynamic characteristics of conveyor belt, but compared with the Assembly model, the Shell model is more efficient and closer to the actual situation, and can also calculate the longitudinal velocity. Dynamic parameters other than the vertical direction and the bandwidth direction of the tension.
【学位授予单位】：上海师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH222
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