高速运动堆垛机的结构稳定性研究

发布时间：2018-03-03 10:48

本文选题：堆垛机　切入点：有限元　出处：《昆明理工大学》2011年硕士论文　论文类型：学位论文

【摘要】：单立柱有轨巷道式堆垛机是自动化立体仓库的核心物流设备,其机架结构的稳定性直接影响着整机的性能。堆垛机在自然状态下的静力学分析和满载高速运行状况下的动力学分析是检验其稳定性的重要标准,同时在设计时考虑机架结构的振动情况,对提高堆垛机的各种性能,都具有十分重要的意义。本文主要进行堆垛机的静力学分析和满载高速运行下的动力学分析。首先,在Pro/E中建立堆垛机的三维简化模型,导入ANSYS后对模型施加受力和边界约束,对机架进行满载下的静力分析,得出了当载货台位于高位时,堆垛机的变形量和所受应力最大。其次在静力分析的基础上,对堆垛机进行了动力学研究。文中首先对堆垛机载货台满载货物并处于三个不同位置下,同时机体以0.5 m/s2的加速度向前运行时的模型进行分析。得出了当载货台位于低位时,堆垛机的变形量最大,当载货台位于高位时,堆垛机所受应力最大。其次分析了载货台处于三个不同位置并满载货物,同时堆垛机以0.5 m/s2的加速度向前运行,载货台以0.4 m/s2的加速度上下运行时,堆垛机上各部分的受力情况。得出了当载货台位于低位时,堆垛机的变形量最大。当载货台位于高位时,堆垛机所受应力最大。最后,在动力学分析中,对引起堆垛机变形量最大的两种情况进行了有预应力的模态分析,得出了机体的前十阶固有频率和固有振型。通过分析振型,找出堆垛机上存在的薄弱环节位于立柱顶端和载货台上,并提出相应的改进意见。为后续产品的设计和改进提供参考。
[Abstract]:Single pillar track-type stacker is the core logistics equipment of automatic warehouse. The statics analysis of stacker in natural state and dynamic analysis under full load and high speed are the important criteria to test the stability of the stacker. At the same time, it is of great significance to improve the performance of stacker by considering the vibration of frame structure. In this paper, statics analysis of stacker and dynamic analysis of stacker under full load and high speed operation are carried out. Firstly, the three-dimensional simplified model of stacker crane is established in Pro/E. After introducing ANSYS, the model is subjected to force and boundary constraints. The static analysis of the frame under full load shows that the deformation and stress of the stacker are the largest when the loading platform is at the high position. Secondly, on the basis of static analysis, The dynamics of the stacker is studied in this paper. Firstly, the model of the stacker with full load and three different positions is analyzed, and the model of the machine moving forward with an acceleration of 0.5 m / s ~ 2 is obtained when the cargo platform is in the low position. The deformation of the stacker is the largest, and the stress of the stacker is the greatest when the loading platform is in the high position. Secondly, it is analyzed that the loading platform is in three different positions and the cargo is loaded, and the stacker runs forward with an acceleration of 0.5 m / s ~ 2. When the loading platform is running at the acceleration of 0.4 m / s ~ 2, the stress on each part of the stacker is obtained. When the loading platform is in the low position, the deformation of the stacker is the largest, and when the loading platform is in the high position, the stress of the stacker is the greatest. Finally, in the dynamic analysis, the pre-stressed modal analysis is carried out for the two cases that cause the largest deformation of the stacker crane, and the first ten natural frequencies and natural modes of the airframe are obtained. The weak links on the stacker are found at the top of the pillar and the loading platform, and the corresponding suggestions are put forward to provide reference for the design and improvement of the subsequent products.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH246

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