Product Design And Adaptability Evaluation Of High-speed Railway Lineage Trains

Passenger trains in developed railway countries such as Western Europe and Japan have relatively clear product lineage division,and the formed train products and service objects are relatively clear,which is convenient for passengers to identify,remember and accurately select.It also simplifies the management and adjustment of train operation diagrams and helps to improve the competitiveness of railway markets.However,at present,the lineage characteristics of passenger train products in China are not obvious,the market positioning of different types of trains is not clear enough,and it is difficult for railways to allocate transportation resources and provide transportation services in layers.According to the diversified demands of China's railways,it is of great theoretical and practical significance to carry out lineage design of train products and promote cost control and marketing of railways according to the classification of transportation products.This paper focuses on the optimization design method and adaptability evaluation of lineaged passenger train products.The main contents include:1.Background Introduction and Design FrameworkThis paper analyzes and summarizes the characteristics of foreign lineage passenger trains,analyzes their adaptability to China's railway operation of lineage product trains,introduces the functions of node classification system and OD classification system in lineage,and formulates "traffic flow matching" rules.Clarify the design scope and design principles of lineage products under different line conditions,formulate the design scope and product tree of universal lineage products,and formulate the division rules of spectrum,department,children,grandchildren,service requirements and other levels under the lineage.2.Initial Lineage DesignAccording to the lineage product design rules and based on the characteristics of high-speed railway lines,the specific initial lineage is designed.Each lineage division standard involves different factors such as passenger demand,train stop,train distance and so on.The stop selection of different products is the main research object.On the basis of node classification system,the principle of setting required stops and selecting stops under each lineage is analyzed,and stops are selected according to different OD arrival and departure passenger flow data to ensure the balance of arrival and departure passenger flow.Considering the passenger flow density of different OD passenger flows in different sections in combination with specific routes,the traffic flow matching situation of trains suitable for operation and lineage products is studied.The initial lineage determines the starting and ending points of all kinds of products,train routes,types of trains to be operated,required stops,range of stops to be selected,etc.3.ModelingA single-objective model with maximizing passenger utility as the objective function is established.Parameters,basic constraints,flow distribution constraints and logical constraints are set up for the objective function.The concept of passenger utility degradation is set up.Through hierarchical flow distribution screening and adjustment of stop selection under the initial lineage,lineage products that do not meet passenger demand are deleted,and the matching degree between train products and passenger flow is maximized under the constraint of meeting the load factor.4.Case StudyTaking the Beijing-Shanghai line as an example,this paper designs the initial lineage of Beijing-Shanghai high-speed railway,defines the elements of the initial lineage,and analyzes the stop combination of selected stops and the influence of algorithm constraint changes on stop modes.Through passenger flow distribution and hierarchical flow distribution algorithm,the passenger flow is matched to the corresponding train products,thus reducing the initial lineage scale while ensuring that passengers have priority in taking the train products with the highest utility.Compared with the existing products,the advantages of lineage products are obtained.Finally,extension products and service items are proposed,considering the influence of more dimensions such as ticket price and combined transportation on products,and considering characteristic service items,so as to provide more possibilities for product development and make the lineage product framework more complete.This paper contains 32 figures,25 tables and 50 references.