向家坝水电站施工总布置动态三维可视化仿真研析.pdf

II 内容摘要向家坝水电站是位于金沙江下游的一座巨型电站,其施工总布置牵涉到工程的各个组成部分,各部分施工本身随时间不断变化,大量动态信息难以把握。为直观逼真地表达向家坝水电站施工总布置各环节间复杂的时空关系,本文将虚拟现实技术应用于向家坝水电站施工总布置研究中,主要研究工作如下: (1)提出向家坝水电站施工总布置可视化仿真模式,以VC++为平台,组织仿真数据结构,构造了三维可视化数字模型,直观地表达了施工总布置所涉及的复杂时空信息。(2)根据虚拟场景中模型的特点,对模型进行分类,综合利用各种建模技术,实现三维虚拟场景的静态模型和动态模型的建立,并探讨不同建模技术在虚拟场景中的应用,为简化建模过程,提高建模速度,增强代码的可移植性提供技术支撑。(3)通过研究纹理映射、光照,雾化等特效技术在虚拟场景中的应用,实现增强虚拟场景真实感的目的。(4)建立场景帧监听模块,实现了对虚拟场景的任意漫游、控制;构建数据库, 存储施工总布置属性信息,实现了信息的可视化查询与分析,增强了可视化系统的交互性。(5)基于桌面虚拟现实技术,利用高效的图形渲染引擎Ogre,开发向家坝施工总布置可视化系统软件,建立实时交互查询的虚拟工程施工场景,为用户提供一个直观的、交互的平台,为水利水电工程设计,施工、管理提供一个全新的认知环境。关键词:向家坝水电站施工总布置虚拟现实可视化图形渲染引擎 III Abstract Xiangjiaba hydropower station is a huge hydropower station on down stream of Jinshajiang River, ponent of the engineering is interfered with the construction site layout. Construction of ponent is dynamically changing, thus it’s difficult to grasp large amount of dynamic information. To intuitively and accurately describe the complex and dynamic spatial relationship among all sides interfered in construction site layout design of xiangjiaba hydropower station , Virtual Reality technology for construction site layout of Xiangjiaba hydropower station is studied. The main work in this thesis is as follows: Firstly, the mode of visual simulation for construction site layout of Xiangjiaba hydropower station is presented. Simulated data structure anized with the platform of VC++, and the 3D visual digital modes are and dynamic spatial information interfered in construction site layout is described intuitively. Secondly, According to the characteristics of the model invirtual scene, those models could be divided into two categories: static models and dynamic models. So this paper will explore different modeling techniques invirtual scene, which simplify the construction mold process, improve the speed of modeling and enhance the portability of program code. Thirdly, In order to builda vividscene, some special scene techniqueshad been employed such as texturemapp