Study On Modeling And Simulation Of Urban Distribution Vehicle Trip Chain Under Low Carbon Perspective

Urban distribution is a basic activity of supporting urban production and life.In recent years,with the rapid promotion of urbanization process,urban distribution not only brings convenience to people,but also takes some negative effects on the city environment,such as aggravating traffic congestion,vehicle emissions and others.The problems that what the urban distribution travel characteristics are and how they impact on the environment are due to be studied.In this paper,we study the models/methods of vehicle travel behavior and its environmental impact by using the trip chain as the research tool,with low carbon as the research perspective.First of all,the article analyses the GPS data of urban distribution vehicle,and then it puts forward a recognition technology of urban distribution vehicle trip chain according to the trip chain theory.The technology gradually extracts trip chain information from the vehicle GPS data in the order of stopping points,distribution center and customers,travel endpoints,trip chain.On this basis,the paper puts forward the recognition technology of distribution vehicle trip chain features,including time features,spatial features and operating features.Secondly,based on the theory of carbon emission,two carbon emissions calculation models of urban distribution vehicle trip chain are proposed.One is the carbon emissions calculation model based on GPS data from the micro point of view,and the other one is the carbon emissions calculation model based on the characteristics of the trip chain from the macro point of view.After that the two models are verified through a numerical example.Thirdly,the article constructs a scene simulation model that researches the influences of urban distribution vehicle trip chain characteristics on carbon emissions.The scenes can be classified as the benchmark scenario,speed scenario,vehicle type scenario and customer demand scenario.The simulation results are analyzed,and based on this,the article proposes several suggestions of low carbon urban distribution from the aspects of corporate and government.Finally,the article puts forward the monitoring system framework of urban distribution vehicle based on big data from the perspective of urban distribution demand development.It then analyzes nine key tasks for the construction of the system.And on the basis of research the article puts forward the operation pattern of the system construction in the current stage.