25m高空作业平台结构设计及有限元分析+图纸
时间:2018-12-30 20:42 来源:毕业论文 作者:毕业论文 点击:次
| 摘要高空作业平台是一种将人和物抬升到一定高度的工程机械，它被广泛地应用到城市建设和各种室外作业中。传统的设计方案采用的是安全系数法，这种方法不仅费时费力，而且计算的精度不高。现在，采用有限元法，运用ANSYS软件分析计算，不仅计算精度高，而且能够清晰地看出各处应力的大小，易于改进。首先，根据要求达到的高度25m，选择高空作业平台整体结构，确定每一节臂长，合理选择铰点的位置。再根据强度条件，确定高空作业臂的截面尺寸，选择材料Q235,其弹性模量是206GPa,泊松比是0.3，密度7850kg/m3。利用PRO/E软件画出三文模型，然后导入有限元软件中，定义材料属性，划分网格。根据高空作业平台的实际工作情况施加约束和载荷，然后分析求解。根据分析的结果，找出作业臂的危险截面和危险点，观察其应力和应变值，符合安全标准,但余量过大。对余量过大的部分，减少材料用量。最后，画出上下臂的零件图和整体的装配图。32076 毕业论文关键词：ANSYS；设计结构；有限元；高空平台 Abstract Aerial work platforms is a type of construction machinery which can raise people and things to a certain height. It is widely used in urban construction and a variety of outdoor jobs. Traditional design uses a safety factor method. This method is not only time consuming, but also it does not have a high precision. Now, using the finite element method and using ANSYS software to analysis and calculate not only has a high precision, but also we can clearly see the size of the entire stress, and improve them easily. First, according to the height which is required to achieve a high degree of 25m, select the overall structure of aerial work platforms, then to determine the length of each boom section and select the location of the hinge points. Then, according to the strength conditions to determine the cross-sectional dimensions of high-altitude operation arms. The choice of materials is Q235, and the elastic modulus is 206GPa. Poisson's ratio of Q235 is 0.3, and its density is 7850kg / m3. Using PRO/E software to draw a three dimensional models, and then import the models into the finite element software. Besides, we should also definite the material properties and mesh. Imposing constraints and loads based on the actual situation of aerial work platforms,and then solved analytically. According to results of the analysis to identify dangerous section and the danger point on the operation arms. observe the stress and strain values, and find that they are compliant with safety standards, but more than excessive. We can reduce material consumption in order to solve excessive portion of the remainder. Finally, draw the upper and lower arm part and draw the whole assembly drawings. Keywords: ANSYS;Structural Design;Finite Element;Aerial Work Platform 目录 摘要 Abstract 第一章 绪论 1 1.1 高空作业平台的概况以及前景 1 1.1.1 高空作业平台的综述 1 1.1.2 高空作业平台发展趋势 1 1.2 高空作业平台组成及其技术参数 1 1.2.1 工作机构 1 1.2.2 控制系统 1 1.2.3 动力装置 2 1.2.4 金属结构 2 1.2.5 作业平台主要技术参数 2 1.3 课题研究需要完成的任务 2 1.4 课题研究的意义 3 1.5 课题研究方法以及技术路线 3 第二章 高空作业平台结构设计 4 2.1 材料的确定 4 2.2 高空作业平台类型选择 4 2.3 伸缩原理 5 2.4 计算上臂和下臂的臂长 5 (责任编辑：qin) |