摘要
防洪信息系统建设在防洪体系建设中具有重要的地位,随着信息化技术的提高和防洪信息资源的不断膨胀,综合、直观的防洪信息平台凸显决策支持优势.研究了基于三维虚拟现实技术的防洪数字仿真平台,从平台组成与集成的角度阐述了建立防洪数字仿真平台的总体框架.对洪水淹没过程、流场动态显示、溃堤洪水过程、应急方案定制与显示等防洪数字仿真平台开发的关键环节进行了具体分析,提出了淹没搜索的左右三角形法、流场模拟的粒子系统法、模拟溃堤洪水过程的网格递推法、应急方案定制的修正最短路径法等模块实现方法,并基于三维图形引擎OpenSceneGraph进行了整合集成.开发平台在哈尔滨防洪中得到了应用.
Along with the improvement of information technology and expanding of information resources,the flood protection information system stands out in decision-making field because of supporting integrated and intuitive information.This paper studies the flood protection system which was developed with the technology of virtual reality,expounds the overall framework of this digital simulation platform.Research focuses on the key construction processes and technologies of the three-dimensional simulation platform,including the analysis of flooding process,flow field process simulation,breach flood process simulation,emergency plan making and so on.Several methods were put forward to realize the digital platform,such as,left-right triangle method was used to search submerged area,particle system was used to simulate dynamic flow filed,mesh dispersion method was used to simulate breach flood process,and modified shortest path method was used to make emergency plan.All these methods and processes were realized and displayed based on three-dimensional graphic engine-OpenSceneGraph.The digital platform developed in this paper was used in actual flood protection of Harbin.
出处
《应用基础与工程科学学报》
EI
CSCD
2009年第S1期49-57,共9页
Journal of Basic Science and Engineering
基金
国家科技重大专项(水专项)(2009ZX07209-001)
国家自然科学基金资助项目(50909006)
关键词
三维仿真平台
洪水淹没
流场显示
溃堤
应急方案
Three-dimensional simulation platform
flood submergence
flow field display
breach flood
emergency plan
