大跨柱面网壳结构设计及CFD数值模拟研究

发布时间：2018-06-07 07:18

本文选题：大跨柱面网壳 + 结构设计　；参考：《河北工程大学》2013年硕士论文

【摘要】：由于当今社会对能源、基础建设的需求在不断地增加，煤炭、电力等行业中的大型储煤、储料设施得到了很大发展与应用。大跨柱面网壳结构作为空间网格结构的一种形式，因其受力性能好、经济美观且能适应大跨结构的要求，已成为大型储煤、储料结构的主要类型。本文以某干煤棚为例，系统地阐述了大跨柱面网壳结构的方案设计步骤，论述了各种参数对结构技术及经济指标的影响，最终确定了适合本工程的结构形式及基本参数。本文在方案设计的基础上，针对结构特点，利用基于有限元的分析设计软件MSTCAD对网壳进行结构设计，分别分析了结构在静力、动力作用下的响应，总结了结构的受力特点。由于我国荷载规范未给出针对本文网壳结构的体型系数取值，，而风荷载对于大跨空间结构往往起控制作用，因此本文主要利用CFD（Computational FluidDynamics）数值模拟技术，采用Fluent软件对结构进行数值风洞模拟，阐述了数值模拟的基本步骤及软件模拟过程中相关参数的取值。最后分析结构风压分布规律，得出结构风荷载体型系数。通过与类似工程风洞试验结果的对比以对本文数值模拟方法的准确性进行分析校对，分析了误差产生的原因，探讨了参考规范与数值模拟方法注意的问题。
[Abstract]:Because of the increasing demand for energy and infrastructure, coal storage facilities in coal, electricity and other industries have been greatly developed and applied. As a form of spatial grid structure, large-span cylindrical reticulated shell structure has become the main type of large coal storage and material storage structure because of its good mechanical performance, economic beauty and adaptability to the requirements of large-span structure. Taking a dry coal shed as an example, this paper systematically expounds the scheme design steps of large-span cylindrical latticed shell structure, discusses the influence of various parameters on structural technical and economic indexes, and finally determines the structural form and basic parameters suitable for this project. In this paper, based on the scheme design, the structural design of the latticed shell is carried out by using the finite element analysis software MSTCAD. The response of the structure under static and dynamic action is analyzed, and the stress characteristics of the structure are summarized. Because the load code of our country does not give the value of shape coefficient for the reticulated shell structure in this paper, and the wind load often plays a controlling role in the long-span space structure, so this paper mainly uses the numerical simulation technology of CFD(Computational fluid dynamics. The numerical wind tunnel simulation of the structure is carried out by using Fluent software. The basic steps of numerical simulation and the values of relevant parameters in the process of software simulation are described. Finally, the wind pressure distribution law of the structure is analyzed and the shape coefficient of the structure wind load is obtained. By comparing the results of wind tunnel tests with those of similar projects, the accuracy of the numerical simulation method in this paper is analyzed and proofread, the causes of the errors are analyzed, and the attention of the reference specification and the numerical simulation method are discussed.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU399

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