Research On Reasonable Holding Volume Of The Distribution Vehicles Por The Petrifaction Logistics Centre

Along with the restructuring of the world petrochemical industries, China petrochemical industry is also changed greatly. Regional petrochemical industries with the growing demand of production and consumption gradually developed and expanded. Petrifaction logistics distribution center emerged as the times require, and distribution vehicles as the major carriers for the distribution operation, the rationality of its holding volume plays a positive role for the overall efficiency of the logistics center.According to the physical and chemical speciality of petrochemical products, the article studies the vocation characteristics of the petrifaction logistics distribution center, request of the carrier's main qualification and road transport vehicles. In this particular context, petrifaction logistics distribution center will not only have the normal capacity vehicles, but also have various of special vehicles for dangerous goods delivery, to achieve safe and reliable transportation requirements. And the holding volume of different distribution vehicles will directly affect the distribution capabilities and costs of the petrifaction logistics center, and finally affect the economic benefits of the petrifaction logistics center.On the basis of analysis the cause of various factors which influence the holding volume of the distribution vehicles, the article raises the concept and calculation methods of distribution vehicles reasonable holding volume. Based on historical distribution data, the article using season character exponential smoothing method forecasts the region's future demand, and establishes a mathematical model on the basis of the monthly demand data to calculate the demand of distribution vehicles. At the same time under the distribution vehicles breakdown rate, the article analyzes the reliability of demand protection and adjusts the results of distribution vehicles demand, improved the distribution vehicles' work protection rate. Through the model, it can clearly understand the demand of distribution vehicles and demand trends, greatest meet the customer requirements In addition, the article establishes a variety distribution vehicles mathematical model on the basis of the daily demand data, and provides auxiliary decision-making for the logistics center to adjust the amount of various distribution vehicles. In addition, due to the seasonal fluctuations of the demand for petrochemical products, there is a obvious contradictions between distribution vehicles holding volume and fixed costs input, that is, keep a low volume of distribution vehicles, can not meet demand, and maintain high-volume distribution vehicles, it appears vehicles idle, resources waste. In response to this problem, the article establishes a mathematical model on the basis of the third-party logistics to calculate the reasonable holding volume of distribution vehicles. With the third-party distribution resources, the reasonable holding volume of distribution vehicles calculated by this model can fully satisfy the fluctuant demand, reduce the cost of the vehicles purchase and achieve the minimum total cost of distribution. In addition, the article establishes a mathematical model on the basis of the daily demand data, and provides auxiliary decision-making for the rental number of the third-party logistics distribution vehicles.According to the different distribution models, the article brings forward two methods to calculate the reasonable possessing capacity of distribution vehicles, which gives the logistics center managers suggestions on deciding the reasonable possessing capacity of the distribution vehicles.