Study On Route Planning Of Cold Chain Logistics Distribution Vehicle With Time Window

With the improvement of people's living standard,people's demand for food is becoming more and more strict,and the demand for fresh products is increasing sharply.However,fresh products have the characteristics of short shelf life,easy deterioration and higher storage conditions,which greatly limits the way people buy.For the transportation and distribution of fresh products,the support of cold chain technology is needed,and the storage environment of low temperature should be maintained in the process of distribution and sales.In the distribution problem,because an enterprise has multiple customers located in different locations,it needs to plan the distribution path,while ensuring the interests of both the merchant and the customer,and needs to consider the lowest total cost of the merchant distribution,including the vehicle dispatch cost,fixed cost,fuel consumption cost and so on.In addition,it is necessary to ensure high customer satisfaction and restrict the delivery time required by customers.Therefore,the topic of this paper is to plan the distribution path of different customers in the same distribution center,take the optimal total cost of distribution as the decision goal,and consider the problem of customer satisfaction at the same time,construct the distribution path the time window constraint is added to build the optimization model to ensure that the distribution vehicle reaches the customer point in the time period required by the customer for distribution.at the same time,in order to improve the safety of distribution,the length of the total distribution path is constrained to ensure that the driver's delivery time does not exceed the fatigue driving time.Firstly,the concept and characteristics of cold chain logistics,route planning of distribution vehicle and related concepts and characteristics of genetic algorithm are reviewed.Secondly,the general model of distribution path optimization of fresh food is analyzed,including problem description,modeling idea,model hypothesis and condition constraints,related parameter setting,composition of distribution cost and final model construction.Then,the model is optimized and the process of solving genetic algorithm is introduced based on the general model.analysis,optimization model construction and soon;finally,take T company as an example to verify the optimization model,including T company cold chain distribution status and problem and path optimization solution process,and the results of the operation are analyzed.