圆管带式输送机桁架梁有限元分析及可视化研究

发布时间：2018-08-11 15:25

【摘要】：桁架是金属结构中的一种主要结构形式，具有重量轻、刚度大、抗震性能好、节省材料等优点，广泛应用于起重运输机械、建筑、桥梁、工厂车间以及各种支承骨架等。本文以圆管带式输送机为例，对其桁架梁进行有限元分析。在可视化研究过程中，将力学分析分为常规计算和有限元分析两大模块，并将这两大模块视为目标系统。常规计算模块：根据桁架梁的实体模型，建立相应的力学模型。分析桁架梁所承受的各种载荷形式，确定工况并选择载荷组合，总结并归纳出桁架梁内力计算的递推公式，计算出桁架梁各杆件的内力，，并对杆件的强度、刚度和稳定性进行校核，最后生成设计计算说明书。有限元分析模块：建立桁架梁的有限元模型，利用ANSYS软件进行有限元分析，编写APDL程序完成有限元前处理、求解和后处理三大步骤的参数化分析，并输出应力应变云图。本文首先对目标系统进行了总体需求分析，然后在需求分析的基础上进行了相应的功能分析。根据桁架梁的力学分析过程，利用Visual C++语言编制相应程序，建立人机友好界面，进行参数化设计，实现数据共享，提高系统的可视化程度。将分析计算的结果按照文本形式输出，生成计算说明书，让用户得到精确的数据，大大减少了设计人员的工作量。最后结合工程实例，用本文设计的软件分别运行常规计算和有限元分析两大模块，生成计算说明书，将常规计算和有限元分析的结果进行对比，得到有限元分析与常规计算的结果相近且均满足工程要求，体现了基于APDL的桁架梁有限元分析可视化软件的优越性，具有一定的工程实用价值。
[Abstract]:Truss is one of the main structural forms in metal structures, which has the advantages of light weight, large stiffness, good seismic performance and material saving. It is widely used in crane transportation machinery, buildings, bridges, factory workshops and various supporting skeletons. In this paper, the truss beam of circular pipe belt conveyor is analyzed by finite element method. In the process of visualization research, mechanical analysis is divided into two modules: conventional calculation and finite element analysis, and these two modules are regarded as the target system. Conventional calculation module: according to the solid model of truss beam, the corresponding mechanical model is established. This paper analyzes the various load forms of truss beam, determines the working condition and selects the load combination, summarizes and induces the recursive formula for calculating the internal force of the truss beam, calculates the internal force of each member of the truss beam, and the strength of the truss beam. The stiffness and stability are checked and the design calculation instruction is generated. Finite element analysis module: the finite element model of truss beam is established, the finite element analysis is carried out by using ANSYS software, the APDL program is compiled to complete the pre-processing of finite element, the parameterized analysis of the three steps of solving and post-processing, and the output of stress-strain cloud diagram. In this paper, the general requirement analysis of the target system is first carried out, and then the corresponding function analysis is carried out on the basis of the requirement analysis. According to the mechanical analysis process of truss beam, the corresponding program is compiled by Visual C language, and the man-machine friendly interface is established, the parameterized design is carried out, the data sharing is realized, and the visualization degree of the system is improved. The result of analysis and calculation is output according to the text form, and the calculation specification is generated, which makes the user get accurate data and greatly reduces the workload of the designer. Finally, combined with engineering examples, the software designed in this paper is used to run two modules of conventional calculation and finite element analysis, and generate calculation instructions, and compare the results of conventional calculation and finite element analysis. The results of finite element analysis are similar to those of conventional calculation and meet the engineering requirements. It shows the superiority of the visualization software of finite element analysis of truss beam based on APDL and has certain engineering practical value.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH222

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