基于Fluent软件的白鹤雕塑风场数值模拟

发布时间：2018-03-14 22:05

本文选题：数值模拟　切入点：白鹤雕塑　出处：《南昌大学》2015年硕士论文　论文类型：学位论文

【摘要】：风荷载是实际工程中重要的设计荷载,特别是具有艺术性的构、建筑物,它们的共同特点是体型庞大、结构特殊,且通常无法应用《建筑结构荷载规范》来确定其相应的体型系数和表面风压分布,同时由于结构表面风压分布很容易受到风向、地貌及周围环境的影响等条件的限制,不便通过风洞试验来进行研究,此时通过数值模拟的方法来确定这些体型复杂的建筑结构的风压分布和风场特性具有重要的工程和现实意义。本文采用Fluent软件对大型白鹤雕塑的风场和风压分布进行了数值模拟分析,主要的工作有以下几个方面:(1)介绍了数值模拟的相关概念和模拟风场的各类湍流模型,并对湍流模型进行了分析比较,概括了数值模拟过程中的影响因素。(2)选用TTU模型(标准低矮建筑实尺模型)来对影响数值模拟的一些因素进行研究,通过对比不同情况下的分析结果,为白鹤雕塑数值模拟计算参数的设置提供依据。(3)通过对5种风向角工况下的白鹤雕塑绕流结构的数值模拟,分析和研究了风场和风压系数的分布特性,并描述了雕塑截面突变处风场的复杂性以及风向角的变化对雕塑表面风压系数的影响。(4)给出5种风向角工况下的白鹤雕塑各个截面的风荷载体形系数图,为实际工程中风荷载的计算提供参考。
[Abstract]:Wind load is an important design load in practical engineering, especially the structure and building with artistic character. Their common characteristics are large size and special structure. And it is usually impossible to use the Building structure load Code to determine the corresponding shape coefficient and surface wind pressure distribution. At the same time, because the wind pressure distribution on the surface of the structure is easily restricted by wind direction, geomorphology and surrounding environment, etc. It's not easy to do research through wind tunnel tests, At this time, it is of great engineering and practical significance to determine the wind pressure distribution and wind field characteristics of these complex building structures by numerical simulation. In this paper, the wind field and wind pressure distribution of large white crane sculptures are studied by Fluent software. Numerical simulation analysis was carried out. The main work is as follows: (1) the related concepts of numerical simulation and various turbulence models for wind field simulation are introduced, and the turbulence models are analyzed and compared. In this paper, the influencing factors in the process of numerical simulation are summarized. The TTU model (real scale model of standard low building) is used to study some factors that affect the numerical simulation, and the results of analysis under different conditions are compared. This paper provides a basis for setting the parameters of the numerical simulation of the white crane sculpture. Through the numerical simulation of the flow structure of the white crane sculpture under five wind direction angle conditions, the distribution characteristics of the wind field and the wind pressure coefficient are analyzed and studied. The complexity of wind field and the influence of wind direction angle on wind pressure coefficient of sculpture surface are described. It provides a reference for the calculation of stroke load in practical engineering.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU312.1

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