基于FDS的地下空间增强体验式火灾逃生VR系统
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摘要
为增强虚拟现实(VR)技术在地下空间火灾逃生训练中的应用,从仿真和硬件设计2方面展开研究,开发配备基于火灾动态模拟(FDS)热感单元的逃生VR系统。通过PyroSim软件模拟地下空间火灾过程,并将模拟结果作为系统数据来源;通过Unity二次开发,创建增加热感单元的场景交互火灾逃生视景,以模拟火灾现场高温环境,真实展现火灾场景。试验人员通过系统可充分体验真实的火灾烟气和高温情况,从视觉和热感2方面感受火灾环境。结果表明:精细的火焰和烟气视景模拟以及外部热感单元会对试验人员产生较大刺激感,影响其对逃生路线的选择;试验人员均在70 s内完成逃生,达到逃生训练目标。
For the sake of improving the application of VR technology in fire escape training,a VR system with thermal device for underground space fire drill based on FDS was developed by numerical simulation and hardware design. PyroSim was employed to simulate fire process in underground space and the simulation results were used as data source of this system. Through the secondary development based on Unity,fire drill visual simulation with scene interaction was established. Moreover,thermal device was designed to simulate the high temperature environments and present the real fire environment in underground space. Via this system,testees fully experienced the vivid scene including real fire smoke and high temperature and felt the fire condition in terms of vision and heat. Results show that fine flame,smoke and high temperature make test personnel feel irritated and disturb their choice of escaping route,and that all the test persons have completed the escape within 70 seconds and the aim of the fire drill can be achieved.
For the sake of improving the application of VR technology in fire escape training,a VR system with thermal device for underground space fire drill based on FDS was developed by numerical simulation and hardware design. PyroSim was employed to simulate fire process in underground space and the simulation results were used as data source of this system. Through the secondary development based on Unity,fire drill visual simulation with scene interaction was established. Moreover,thermal device was designed to simulate the high temperature environments and present the real fire environment in underground space. Via this system,testees fully experienced the vivid scene including real fire smoke and high temperature and felt the fire condition in terms of vision and heat. Results show that fine flame,smoke and high temperature make test personnel feel irritated and disturb their choice of escaping route,and that all the test persons have completed the escape within 70 seconds and the aim of the fire drill can be achieved.
引文
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