轻量级WebVR地铁站大规模火灾情景实时仿真研究  

Lightweight WebVR Real-Time Simulation of Large-Scale Fire Scenario in Metro

作　　者：李阳[1] 张惠娟[1] 葛晨晨 谢康 李庄 贾金原[1] Li Yang;Zhang Huijuan;Ge Chenchen;Xie Kang;Li Zhuang;Jia Jinyuan(School of Software Engineering,Tongji University,Shanghai 201800,China)

机构地区：[1]同济大学软件学院,上海201800

出　　处：《系统仿真学报》2023年第3期646-657,共12页Journal of System Simulation

基　　金：国家自然科学基金面上项目(6207071897);国家自然科学区域联合基金重点项目(U19A2063)。

摘　　要：大规模火灾仿真需要庞大的计算量和卓越的渲染能力,对Web端实时在线火灾仿真系统的实现提出了挑战。提出了一套轻量级Web端地铁站火情实时仿真技术框架。基于火灾安全领域中的计算公式整理简化,分析地铁站防烟设施影响,提出了基于防烟分区的两阶段烟雾扩散模型,实现烟雾扩散趋势计算;提出了Web端的防烟分区级多粒度粒子发射器框架,完成火焰和烟雾形态的渲染,实现基于Web端实时计算和可视化过程。试验验证表明:本文方法与专业火灾模拟软件模拟结果在大体趋势上相近,并且打开网页即可实时在线对火灾进行模拟,在便捷性上拥有显著优势。Large-scale fire simulation requires a huge amount of calculation and excellent rendering capabilities,which poses a challenge to the realization of a real-time online fire simulation system on the Web.A lightweight Web-based real-time simulation technology framework for subway station fire is proposed.Based on the simplification of calculation formulas in the field of fire safety and the analysis of the impact of smoke prevention facilities in subway stations,a two-stage smoke diffusion model based on smoke bay is proposed to achieve the smoke diffusion trend calculation;a Web-side multi-granularity particle emitter framework at the smoke bay level is proposed to complete the rendering of flames and smoke shapes,and to realize the real-time calculation and visualization process based on the Web.The experimental verification shows that the simulation results of the method in this paper are similar to the simulation results of the professional fire simulation software.And the method in this paper can simulate the fire online in real time by opening the Web page,which has a significant advantage in convenience.

关 键 词：火灾仿真 烟雾扩散 WebVR 轻量级动态建模 实时渲染 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]