Research On Earthquake Disaster Scene Simulation And Rescue Virtual Simulation Training System

Practice has proved that Earthquake Emergency Rescue is one of the keymeasures of Earthquake prevention and Disaster Reduction;it is a necessarygovernment behavior to reduce the casualties after earthquake in the maximaldegree.'Scientific Rescue'is an important conception of modern rescue,andthat how to ensure'Double Safety',safety of both survivals and rescuers,isthe most important concern in the rescue action.The improving of Rescueskills and levels needs scientific training,and yet the simulative trainingenvironments usually cannot be provided in the practice,while the livingsimulative earthquake disaster scenes and ruins environments can bepresented by Virtual Simulation Technology.Simulative earthquake disasterspots of different scales can make rescuers understand the rigorousness ofthe actual rescue environments efficiently,and based on the concretesimulative ruins,the rescue strategies and methods can be developed.So,there is an extremely important practical significance to develop the system ofearthquake disaster scene simulation and virtual simulation training for rescuetraining.The preliminary exploratory study of simulative skills and method ofearthquake disaster scenes and Virtual Simulation Training System ofEarthquake Rescue is presented in this paper.And the main research contentsare as follows:(1).Theoretical Explanation to System SimulationFrom the point of view of System Science,Modeling Theory andSimilarity Method etc,this paper has discussed the theoretical basis of SystemSimulation,and described the meaning,classification method,researchprocess,technical characteristic and application scope etc,which laid abasic theoretical foundation of the research in this paper.(2).Establishing Method of Simulation Model Based on Seismic DamageTypical seismic damage characteristics to multistory masonry building,reinforced concrete frame structure and brick-wood (brick-and-clay) structurehave been summarized.Using software,Photoshop image processing,typicalseismic damage characteristics have been extracted from lots of seismicdamage pictures.And Graphic Library of typical seismic damagecharacteristic is established with Photoshop.3-d simulation model ofearthquake damage with five damage grades of multi-storey brick building,frame structure and brick-wood (brick-and-clay) structure is established,using external modeling software 3DSMax,which provides the driven subject ofsimulation model of earthquake disaster scene.(3).Classification Method of Building RuinsClassification method based on rescue building ruins is proposed.According to the use and function of ruins,they are classified into five kindsas follows:site rescue ruin,rescue training ruin,rescue practicing ruin,rescuesimulation ruin and rescue sand table ruin,definitions and basic intensions aregiven at the same time,which establishes the foundation for rescue research inruins in the future.(4).Simulation Model of Earthquake Disaster SceneThe research objective of simulation model of earthquake disaster sceneis determined and the functional composition,the research thought of themodel are given based on the objective.In the paper it clarifies that theinfluence field in earthquake disaster scene is a general earthquake influencefield estimation that without the limit of specific seismogeologicalbackground,and introduces several relationship models of the epicentralintensity and the magnitude and circular attenuation models of earthquakeintensity which can be used to this model.The radius of equivalent circle of96 historic earthquake intensities are calculated according to the equal areaprinciple and the database is established in this paper.As the damage grade abridge,the model of the earthquake damage states of buildings in virtualearthquake disaster scene and the model of Distributed Control are presentedbased on seismic damage prediction method.The seismic damage matrix ofseveral structures in 153 historical earthquakes is deduced by mathematicmethod and the database is established.(5).Simulation Generation System of Earthquake Disaster SceneUsing computer simulation technology,the simulation model ofearthquake disaster scene has been programmed and the simulation generationsystem of virtual earthquake disaster scene exploited.Given a parametersetting,the system has generated virtual disaster scene of scenario earthquakeand simulated spatial distribution characteristic of different earthquakedamages with spatial distribution of influence fields and different buildingstructures.The verisimilitude of disaster scenes generated by the system hasverified the reliability of the simulation model of earthquake disaster scene,which reflects true-to-life effect of 3-d simulation model of earthquakedisaster.The system supports to add building damage models to virtualearthquake disaster scene,and the system of ruin remodification and regeneration is realized based on collision detection has been implemented andfunctions of the system extended.(6).Virtual Simulation Training System of Earthquake RescueThe principles and methods of earthquake rescue are summarized andsome rescue models are emphatically described.This paper mainly introducesthe function design,whole design,structure composition of the virtualsimulation training system of earthquake rescue,and training scenario,systemstructure,management of simulation resources,the control of virtual human,basic functions of operation subsystems,ect.