基于双层协作机制的双向行人流仿真模型.docx

基于双层协作机制的双向行人流仿真模型摘要：针对现有行人仿真模型在行为特性表示不全面和建筑物空间结构表达、空间单元状态的动态存储及转换、仿真过程及结果可视化等方面存在的缺陷提出了基于双层协作机制的双向行人流仿真模型.通过对南京地铁新街口站换乘通道内行人行为的实地观测全面分析了行人在双向通道内的行为特征.在模型中的通道环境层利用GIS技术进行栅格化并存入空间数据库在仿真输出阶段应用可视化引擎将场景输出至图形界面；在行人行为层基于Multiagent和CA理论建立行人行为决策模型构建的智能体考虑了行人个体特性和行为.通过计算机仿真揭示了平均速度与仿真时间步、行人密度的关系.模型成功再现通道内双向行人流的编队成行及相变现象.关键词：双向行人流；微观仿真；双层协作；多智能体中图分类号：TP391.9文献标志码：AABiLayerCooperativeSimulationModelofBiDirectionalPedestrianFlowsTONGWeipingCHENGLin（SchoolofTransportationSoutheastUniversityNanjing210096China）Abstract：PedestrianbehavioralcharacteristicsinmetrointerchangepassagewayswereanalyzedbymeansofthesiteobservationdataatXinjiekouStationofNanjingSubway.Acomprehensivebilayercooperativemodelforbidirectionalpedestrianflowswasdevelopedtoeliminatethedrawbacksintheexistingmodelsintermsofbehavioralcharacteristicsthespatialstructureexpressiondynamicstorageandtransformationofspatialunitstatesandthesimulationvisualization.InthemodelthelayerofpassagewayswasfirstrasterizedusingGIStechnologyandthenthedatawerestoredinthespatialdatabaseandfinallyoutputtotheGUIbyvisualizationengineinthepostsimulationstagescene.InthelayerofpedestrianbehaviorsadecisionmodelwasestablishedonthebasisoftheMultiagentandCAtheories.Themodeldefinedtheagentwiththeconsiderationofpedestrianscharacteristicsandactions.Thesimulationresultsobtainedfromthemodelexerciseillustratedthedensityspeedcurveandthetimeintervalandspeedcurve.Thesimulationshowsthatthemodelcanreproducethetypicalphenomenaobservedinrealitysuchasformationofbidirectionalpedestrianflowsandthephasetransition.Keywords：bidirectionalpedestrianflow；microscopicsimulation；bilayercooperation；multiagent行人行为不仅受自身生理、心理、行为目的等因素影响同时还随周围环境而改变进而表现出不同的行人流自组织特征：如建筑物内疏散行人流在出口处的阻塞、成拱现象；交叉行人流在交叉处的流动斑纹现象；双向行人流即相向行人流的编队成行现象等.有关行