基于ANSYS Workbench的螺栓法兰有限元分析与优化

发布时间：2018-05-19 18:36

本文选题：螺栓法兰 + ANSYS　；参考：《浙江海洋大学》2017年硕士论文

【摘要】：螺栓法兰结构具有密封性能好、拆卸方便、强度高的优点,因其优点该结构在油气管道、压力容器连接处有着比较广泛的应用。但因其工况环境的复杂性,法兰接头处的密封系统可能会密封失效从而出现泄漏现象。这样不仅造成资源浪费,对周围环境造成严重污染,甚至会直接威胁人民的人身财产安全,可见螺栓法兰系统对管道和压力容器的安全运行起着至关重要的作用。而法兰强度的大小与法兰泄漏之间有着极其密切的关系,分析法兰系统受力强度大小对分析法兰泄漏情况有极其重要的意义。本文的研究对象是由法兰-螺栓-垫片组成的螺栓法兰整体结构,借助Pro/ENGINEER软件构建三维参数模型,并通过ANSYS Workbench软件对整体螺栓法兰结构和组成零件进行有限元分析,分析出整体及各零件的应力及应变分布规律,得出螺栓法兰连接系统在预紧情况下以及在承压工况下的受力和应变的变化规律。结果表明:预紧和承压工况时,螺栓法兰连接件整体和各组成零件件应力分布规律变化基本一致,并且随着管称压力的逐渐增大,各部位所受到的应力强度也逐渐增大,而法兰和螺栓的变形也随着压力的增强而随之变大。文章的最后把有限元法与优化设计思想相结合,以ANSYS Workbench软件的Design Exploration模块为工具对螺栓法兰整体结构的组成零件进行参数优化分析。通过分析计算得到法兰连接系统各部件优化后的几何尺寸,这对减小螺栓法兰接头所受的最大等效应力、降低法兰变形量、提高螺栓法兰的使用寿命具有非常重要意义,也可为螺栓法兰连接系统各零件的设计提供较合理的的指导和借签作用。
[Abstract]:The bolted flange structure has the advantages of good sealing performance, convenient disassembly and high strength. Because of its advantages, the structure is widely used in the connection of oil and gas pipelines and pressure vessels. However, due to the complexity of the working environment, the sealing system at the flange joint may fail and leak. This will not only cause waste of resources, cause serious pollution to the surrounding environment, but also directly threaten the personal and property safety of the people. It can be seen that the bolted flange system plays an important role in the safe operation of pipelines and pressure vessels. The flange strength is closely related to the flange leakage. It is very important to analyze the flange system strength. The research object of this paper is the whole structure of bolt flange which is composed of flange, bolt and gasket. With the help of Pro/ENGINEER software, the 3D parameter model is constructed, and the finite element analysis of the structure and component parts of integral bolt flange is carried out by ANSYS Workbench software. The stress and strain distribution of the whole and the parts are analyzed, and the variation law of the stress and strain of the bolted flange connection system under the condition of preload and under pressure is obtained. The results show that the stress distribution of bolted flange joints is basically the same as that of component parts under preloading and pressure-bearing conditions, and with the increasing of pipe pressure, the stress intensity of different parts increases gradually. The deformation of flanges and bolts also increases with the increase of pressure. In the end of this paper, the finite element method is combined with the idea of optimal design, and the parameter optimization analysis of the integral structure of bolted flange is carried out by using the Design Exploration module of ANSYS Workbench software as a tool. Through the analysis and calculation, the optimized geometric dimensions of the components of the flange connection system are obtained, which is of great significance to reduce the maximum equivalent stress of the bolted flange joint, reduce the flange deformation and improve the service life of the bolted flange. It can also provide reasonable guidance and sign for the design of bolt flange connection system.
【学位授予单位】：浙江海洋大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH131.3

【参考文献】