| recent years,with the acceleration of China ’ s urbanization process,coupled with the rapid development of the Internet and e-commerce,the demand for urban logistics and distribution has increased significantly.The rapid growth of urban distribution logistics promotes the surge of urban distribution vehicles.With the concept of“green environmental protection”further rooted in the hearts of the people,the state vigorously promotes green logistics,and pure electric logistics vehicles are increasingly appearing in various transportation scenarios.As an important means to control traffic pollution,pure electric logistics vehicle has become the preferred transportation tool to replace the traditional fuel logistics vehicle to solve the urban distribution demand and realize the green development of logistics.However,compared with traditional fuel vehicles,pure electric logistics vehicles with the same specifications have smaller rated load and are extremely sensitive to cargo weight.The formulation of pure electric logistics vehicle scheduling scheme is more vulnerable to the influence of cargo characteristics.In the real urban distribution scenario,the number of customers to be distributed is large,and the goods required by different customers are different;At the same time,there are many types of goods delivered,and the characteristics of different types of goods vary greatly.Therefore,on the basis of the traditional pure electric logistics vehicle scheduling optimization problem,this paper considers the impact of different types of goods and customer demand separability on vehicle scheduling scheme,and studies specific problems.The main work is as follows :(1)The urban distribution application of pure electric logistics vehicle is studied.Firstly,the concept and characteristics of pure electric logistics vehicle are introduced and the development status of pure electric logistics vehicle is analyzed.Then the factors that need to be considered in the application of pure electric logistics vehicles in urban distribution are analyzed.Finally,combined with the characteristics of urban distribution,the feasibility and necessity of the application of pure electric logistics vehicles in urban distribution are analyzed,which provides a reference for further promoting the application of pure electric logistics vehicles.(2)A pure electric logistics vehicle scheduling optimization model considering the characteristics of goods is constructed.Firstly,the vehicle scheduling optimization problem of pure electric logistics vehicle considering the characteristics of goods is described in detail and reasonable assumptions are made.Then,considering vehicle load,volume constraint,driving range constraint,road runoff constraint and time window constraint,a pure electric logistics vehicle scheduling optimization model considering the characteristics of goods is constructed.Finally,the genetic algorithm for solving the model is designed.(3)Taking a city distribution enterprise in Beijing as an example for case analysis.The model is solved based on the actual data of a logistics distribution enterprise,and the results of the vehicle scheduling scheme that the demand cannot be split and the optimized vehicle scheduling scheme are analyzed.The analysis results show that under the condition of considering the influence of the weight and volume of the goods on the distribution scheme,the vehicle scheduling scheme can be arranged by reasonably splitting the customer demand,which can effectively reduce the number of distribution vehicles and improve the utilization rate of enterprise capacity resources,so as to verify the validity and feasibility of the model. |
