基于虚拟现实技术的喷射火事故三维动态仿真及应用

基于Shell模型的原理和计算方法,把喷射火焰视为近似倒立圆台形,构建了不同风向影响下的喷射火三维模型,运用虚拟现实技术和三维可视化技术对喷射火事故进行模拟与仿真。以Delphi和OpenGL/GLScene为开发工具,实现了喷射火三维模型的程序化与三维场景绘制,同时引入粒子特效系统,实现了喷射火焰燃烧的实时动态仿真,完成了喷射火三维动态可视化软件系统的开发。最后,利用该系统进行实例分析。应用表明:虚拟现实技术与事故后果模拟相结合,使整个系统实现实时性和形象性的统一,虚拟现实技术在化工行业具有广泛应用前景,也为事故后果预测评估提供科学依据。

The Three-dimensional Dynamic Simulation of Jet Fire Based on Virtual Reality Technology and Its Application

Based on the theory and method of shell model,the three-dimensional(3D)model of jet fires under different wind directions,which was approximately considered as an inverted frustum,was constructed.Using virtual reality(VR)technology and 3D visualization technology,the simulation of jet fire was achieved.Taking Delphi and OpenGL as the development tools,the 3D model of jet fire was programmed and the drawing of 3D scene was achieved.Meanwhile,the real-time dynamic simulation of jet flame was also achieved based on the particle system.Thus,the development of 3D Dynamic Visualization Simulation Software System for jet fire was completed.Finally,a case was analyzed with this system.The application result shows that the combination of VR technology and accident consequence simulation achieves the unity of real-time and visualization,which not only embodies the great engineering value of VR technology in the field of chemical industry,but also provides references for the prediction and assessment of accident consequence.