| In recent years,China’s new urbanization process has been accelerating,and the backbone of rail transit in urban area public transport has become increasingly prominent.Larger cities in China have gradually formed multiple levels of urban rail transit,municipal railways,and inter-city railways.Multi-agent rail transit network.Under the development situation that the road network has reached a certain scale and multiple rail transit modes coexist,improving the status quo of independent operation of various rail systems and creating a regional multistandard rail transit composite network with reliable network structure and network functions is the future of urban development.Inevitable demand.Based on the technical characteristics of different systems of the multi-standard rail transit network and the development goals of the composite network,this paper proposes the definition of the reliability of the regional multi-standard rail transit composite network.By analyzing the influencing factors of the reliability of the composite network,the regional multi-standard rail is established.The reliability evaluation of transportation composite network is divided into two dimensions: static reliability evaluation and dynamic reliability evaluation.The static reliability evaluation index system evaluates the network structure,and the evaluation results are long-term and stable.This article establishes a method for constructing the topological structure of a composite rail transit network,and evaluates the composite rail transit network from three measures: macro network natural connectivity,network heterogeneity,and micro network convergence.The network topology and node connection methods are evaluated.Two influencing factors responded.The dynamic reliability evaluation index system is to evaluate the network function,that is,to evaluate the degree of matching between the network’s transportation organization plan and the demand for passenger transportation.The evaluation is based on the path as the basic unit.Therefore,by analyzing the generalized travel cost of the multi-standard rail transit path,the DBFS algorithm is used to screen the effective path set between the ODs,and the dynamic path reliability of the network is taken as the input respectively And network travel time reliability construction evaluation plan,reflecting the network transportation organization plan and passenger transportation demand two factors affecting network reliability.Combined with the evaluation index system of the network,the reliability index weighting method of the rail transit composite network based on the entropy weight method and the comprehensive evaluation model of the reliability of the rail transit composite network based on extenics are constructed.By describing the basic concepts and methods,The adaptability of the model was demonstrated,and the relevant parameters were calibrated.In this paper,a regional multi-standard rail transit composite network in Chengdu is used as an example.Using the evaluation method of static reliability and dynamic reliability of the composite network constructed in the article,the topological modeling,index calculation,analysis and evaluation of the composite rail transit network in Chengdu are performed..It is found that the static and dynamic reliability of the composite rail transit network in Chengdu is relatively good overall,the validity of the evaluation scheme is verified,and corresponding improvement suggestions are proposed for the composite rail transit network in Chengdu based on the evaluation results. |
