基于ADAMS和ANSYS的矿用装载机联合仿真分析

发布时间：2018-03-23 06:00

本文选题：矿用装载机　切入点：动力学　出处：《武汉科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着采矿行业的快速发展，洞采设备也在大步向前发展。矿用装载机作为发展最快、需求量最大的洞采设备之一，对降低工程成本、保障工程质量、提高作业安全性和可靠性有重要作用。本论文以国内某厂自主研发的矿用装载机为对象，对其工作范围及工作装置的动态特性进行整机仿真分析，从回转块和小臂出现的开裂现象出发，对其动力学性能进行研究，力图从力学性能层面寻找其失效原因。首先，依据矿用装载机工程图建立三维实体模型。将三维模型导入ADAMS建立刚性虚拟样机，通过运动学和动力学仿真研究，得到该工作装置的主要性能参数，各构件铰点约束反力曲线以及油缸力学特性曲线，并对液压系统压力和驱动油缸进行校核。然后，利用ANSYS创建回转块和小臂的模态中性文件，对小臂进行模态分析并提取前6阶模态振型，为振动特性分析、结构动载优化提供参考。最后，利用ADAMS进行刚柔耦合动力学仿真，以修正柔性体铰点处的约束反力，将修正后的约束反力再加载到柔性体进行计算，，从而得到一个工作循环过程中柔性体的应力变化过程；通过对一个工作循环过程中柔性体的应力变化过程进行分析得到柔性体出现最大应力的节点，对应的时间及应力位移分布云图；提取该节点在一个工作循环过程中的动应力-时间历程曲线，对回转块和小臂强度进行综合校核，得出结构开裂是由于结构强度不足引起的。本文运用ADAMS和ANSYS对矿用装载机进行仿真分析，通过刚柔耦合分析对工作装置出现的开裂现象进行深入研究，这种方式避免了静力学结构分析的局限性，为产品的结构故障原因分析、结构优化设计提供理论依据。
[Abstract]:With the rapid development of mining industry, hole mining equipment is also developing rapidly. As one of the fastest growing and most needed mining equipment, mining loader can reduce the project cost and guarantee the engineering quality. It is important to improve the safety and reliability of work. In this paper, a mine loader developed by a domestic factory is taken as an object, and its working range and the dynamic characteristics of the working device are simulated and analyzed, and the dynamic performance of the loader is studied from the cracking phenomenon of the rotating block and the forearm. This paper tries to find out the cause of failure from the aspect of mechanical properties. Firstly, the 3D solid model is built according to the engineering drawing of mine loader, and the 3D model is imported into ADAMS to build rigid virtual prototype. The main performance parameters of the working device are obtained by kinematics and dynamics simulation. The reaction curve of hinge point constraint and the mechanical characteristic curve of the cylinder are obtained, and the pressure and the driving cylinder of the hydraulic system are checked. Then, the modal neutral files of the slewing block and the lower arm are created by using ANSYS, and the modal analysis of the upper arm is carried out and the first six modal modes are extracted, which provides a reference for the analysis of vibration characteristics and the optimization of the dynamic load of the structure. Finally, the rigid-flexible coupling dynamics simulation is carried out by using ADAMS to correct the constrained reaction force at the hinge point of the flexible body, and the modified constrained reaction force is loaded into the flexible body to calculate. The stress variation process of a flexible body during a working cycle is obtained, and the node with the maximum stress is obtained by analyzing the stress variation process of the flexible body during a working cycle. By extracting the dynamic stress-time history curve of the node during a working cycle and checking the strength of the rotary block and the brachial arm, it is concluded that the structural cracking is caused by the lack of the structural strength. In this paper, ADAMS and ANSYS are used to simulate and analyze the mine loader, and the cracking phenomenon of the working device is deeply studied through the rigid-flexible coupling analysis, which avoids the limitation of statics structure analysis. It provides theoretical basis for structural fault analysis and structural optimization design of products.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD422.3

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