Introduction Of Cold Chain Logistics Distribution Model With Connecting Points

Cold chain logistics distribution has its special requirements,not only the temperature and humidity must be controlled,but also the distribution time is required.Since large refrigerated trucks are the main tools for bulk transportation in the process of cold chain transportation,their tonnage is large,the acquisition cost is high and the operation cost is also relatively high,so adjusting the distribution mode of cold chain logistics,considering how to give full play to the use value of refrigerated trucks and improving their utilization rate is the urgent demand of cold chain logistics.The general mode of urban cold chain distribution is door-to-door delivery service from cold storage to customers,but limited by the scattered customer demand points and the total demand,the scattered delivery time and urban roads and other factors,this door-to-door service consumes a lot of time for cargo handover and in-transit time,and cannot give full play to the capacity of reefer trucks.Based on the demand of bulk transportation of cold chain,this thesis considers the introduction of the distribution mode of connecting point,that is,in the actual distribution process,the introduction of connecting point,determine the threshold of connecting point enablement,use large vehicles and small vehicles to complete the goods connecting in the pre-planned location of the connecting point,with the help of small vehicles instead of large vehicles to provide customers with "last mile" service,which can It can improve the efficiency of large refrigerated trucks,which is important to improve the operation of cold chain logistics enterprises.In this thesis,we firstly study the redistribution of the distribution service area according to the vehicle route and the demand of cargo loading,i.e.the selection of the connection point.Based on the historical data of previous years,cluster analysis is used to divide the service area in the selection of feeder points,and the originally scattered customer nodes in a service area are integrated together so that they share the same feeder point,and then the feasibility of the geographic location of the feeder point is further considered and the final geographic coordinates of the feeder point are adjusted.Secondly,considering the cost factor,a distribution optimization model is constructed to ensure the timely and high-quality delivery of goods to each customer node while achieving the optimal total cost of distribution.Finally,two-stage genetic algorithm,design optimal path generation algorithm,load constraint algorithm and time window algorithm for introducing feeder points are used to implement the distribution optimization model and generate a reasonable distribution plan.In this thesis,210 customer nodes in Dalian city and 110 orders with distribution demand are obtained for example analysis.The comparison results of the two distribution modes show that the cold chain logistics distribution mode with the introduction of feeder points is more economical,time-efficient and has better vehicle utilization,which can improve the profitability for the cold chain logistics enterprises by taking into account the characteristics of cold chain goods and the requirements of cost reduction and efficiency increase of enterprises,and a new cold chain logistics distribution mode and distribution method is proposed.The new cold chain logistics distribution mode and distribution method are proposed.The introduction of cold chain transportation mode of connecting points can save the delivery time of large refrigerated trucks,increase the delivery frequency of vehicles and improve the operational efficiency of cold chain logistics enterprises under the premise of satisfying the delivery demand of customers.