洪水仿真模拟的三维可视化技术研究

发布时间：2018-04-03 03:05

本文选题：三维可视化　切入点：场景构建　出处：《大连理工大学》2014年硕士论文

【摘要】：洪水等自然灾害的频发对人民的生命和财产造成了严重的损害,洪水的预测与防治已经迫在眉睫。预测洪水的演进过程,并在洪水来临前,迅速采取有效的防治措施,显得尤为重要。洪水演进的核心部分是洪水可视化数值模拟,目前,市场上可用的商业软件主要模拟一维或者二维洪水的演进,在二维可视化领域有着重要的应用,在洪水三维可视化领域,商用软件的使用范围相对较窄,软件的扩展性还比较弱,对计算机硬件的要求苛刻,算法模拟精度还有待于进一步的提高。针对这些问题,本文提出基于二维浅水方程建立水力学模型,编程语言采用C++与OpenGL,应用纹理贴图技术,再结合数据库技术,在VC++软件环境下,模拟三维洪水的演进。首先,为了验证模型的有效性,基于扎龙湿地地形高程数据,构建洪水三维可视化虚拟场景,进行洪水演进的数值计算；其次,为了直观、形象地观察地形上洪水演进过程中,洪水的大小,在对洪水模拟的基础上,对流场进行了模拟；再次,为了了解某一断面处洪水的信息,对洪水的断面进行了研究分析；最后,本文尝试在三维可视化场景中增加对雾、雨等自然现象的模拟。洪水三维可视化系统的建立,说明结合水力学模型以及纹理贴图技术,在计算机软硬件技术的支持下,可以为洪水的模拟提供技术支持,对防洪决策以及洪水资源利用具有实际意义。
[Abstract]:The frequent occurrence of natural disasters, such as floods, has caused serious damage to people's lives and property.It is very important to predict the course of flood and to take effective preventive measures before the flood comes.The core part of flood routing is numerical simulation of flood visualization. At present, commercial software available on the market mainly simulates one-dimensional or two-dimensional flood routing, which has important applications in the field of two-dimensional visualization, and in the field of three-dimensional flood visualization.The scope of commercial software is relatively narrow, the extensibility of software is relatively weak, the requirements for computer hardware are harsh, and the accuracy of algorithm simulation needs to be further improved.In order to solve these problems, a hydraulic model based on 2-D shallow water equation is proposed in this paper. C and OpenGL are used in programming language, texture mapping technology is used, and database technology is used to simulate 3D flood routing in VC software environment.Firstly, in order to verify the validity of the model, based on the topographic elevation data of Zhalong wetland, a 3D visualization virtual scene of flood is constructed to calculate the flood routing. Secondly, in order to visualize and visualize the process of flood routing on the terrain,The size of the flood is simulated on the basis of flood simulation. Thirdly, in order to understand the flood information at a certain section, the section of the flood is studied and analyzed.This paper attempts to add the simulation of fog, rain and other natural phenomena in the 3D visualization scene.The establishment of 3D flood visualization system shows that the combination of hydraulic model and texture mapping technology, with the support of computer software and hardware technology, can provide technical support for flood simulation.It is of practical significance for flood control decision and utilization of flood resources.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P333.2;TP391.41

【参考文献】