Research On Optimization Of Cold Chain Logistics Distribution Path Under Time-Varying Network

With the increasing demand of consumers for fresh products and their higher quality requirements,the cold chain logistics industry has developed rapidly in this situation.At the same time,under the background of the national "carbon peaking and carbon neutrality" policy,logistics enterprises are gradually using pure electric logistics vehicles to replace the traditional fuel logistics vehicles,but in the cold chain logistics industry,the traditional fuel refrigerated vehicles are still dominant,and the replacement process is slow.This thesis studies the distribution route optimization of traditional fuel refrigerated vehicles and pure electric refrigerated vehicles.First of all,the relevant research status and basic theories are summarized and analyzed.On the basis of existing research and related theories,the starting point and innovation point of this paper are expounded to provide theoretical support for the whole paper.Secondly,the cost composition of refrigerated vehicles carrying different power sources is analyzed,relevant constraints are set,and an optimization model aiming at minimum total distribution cost is constructed under the time-varying network.The total distribution cost includes fixed cost,transportation cost,refrigeration cost,penalty cost and freight damage cost.In addition,it also includes the carbon emission cost generated by traditional fuel refrigerated vehicles and the charging cost generated by pure electric refrigerated vehicles.Finally,the genetic algorithm is improved and designed in this thesis,and the improved genetic algorithm and the optimized model constructed in this thesis are run by Matlab,the cold chain logistics distribution case of X company is analyzed,and the distribution model with the lowest overall distribution cost and the optimal distribution decision are selected for X company.At the same time,sensitivity analysis is carried out on the vehicle speed,the carbon emission price of traditional fuel refrigerated vehicles and the charging cost of pure electric refrigerated vehicles,providing suggestions and references for the future development decisions of related enterprises.