Research On 3d Dynamic Visualization Consequence Simulation Of Mhi's Fire And Explosion Accidents

With the rapid development of industrialization, the number of major hazard installation (MHIs) is increasing. MHIs are with the charactoristics of distribution, high danger and strong impact so that the lives, property and environment will be threatened. Although the traditional models can describe the two-dimensional (2D) characteristics of accident, it is lack of three-dimensional (3D) information, so that it can not objectively and accurately analyze consequence in 3D space. For this, research on consequence simulation of MHIs from 3D view is much more necessary and important for accident prevention & control, emergency rescue and regional planning.This paper carries out 3D simulation of MHI's fire and explosion from the following three aspects:(1) 3D dynamic consequence simulation method of MHI's fire and explosion is set up. According to accident occurring mechanism, conditions and risk characteristics of jet fire, pool fire, vapor cloud explosion (VCE) and boiling liquid expanding vapor explosion (BLEVE), 3D dynamic simulation methods of accident consequence based on traditional mainstream accident models are set up to provide a theoretical basis for the following 3D simulation system development.(2) A 3D dynamic visualization consequence simulation system of MHI's fire and explosion is designed and developed. Under the guidance of system engineering and software engineering, software system design and setting up development platform based on a GIS-based distributed remote monitoring system for MHI are completed including analysis of system functional requirement, division of system module, analysis of system data flow, and choice of database system, etc. According to eht established fire and explosion models, the whole functional modules are completely developed by virtual reality (VR) technology and the main programming tools of Delphi and GLScene.(3) 3D visualization simulation system application of MHI's fire and explosion. The functional modules of system are used by taking a high purity composite liquefied petroleum gas (LPG) tank in an enterprise for example. After analysis and cosequence simulation of potential accidents in the enterprise by using this system, results of consequence simulation are checked by references and softwares named SAFETI, FLUENT and Major Hazard Assessment Unit (MHAU) designed by Health and Safety Executive (HSE).The application shows: this software system can effectively describe fire and explosion accident and analyze risk characteristics of accidents from 3D view, so that information of fire and explosion phenomenon is more comprehensive and objective to provide scientific basis for government and enterprises on accident prevention, consequence prediction, surrounding regional planning and taking emergency measures, etc.