Simulation Analysis Of Factors Affecting The Accumulation Parameter Of Freight Cars In Marshalling Yard

With the deepening of China's market economy and the accelerating process of Chinese urbanization,the demand of transportation market is also increasing.In addition,China has a vast territory whose region from east to west across the 540km,north and south are 520km,land area ranks third in the world;the average distance between the central cities in different regions is far away.Due to resource distribution in our country is not balanced,which makes the coal and oil and other bulk raw materials of long-distance transport pressure.In the face of the increasingly severe traffic situation,the railway freight transportation not only temporarily unable to meet the huge demand of the transport market,but also its own development has encountered no small challenge.As an important part of railway freight transport,the railway marshaling station bears important responsibilities.The train assembling accounts for about 40%to 50%of the total time according to the statistics of some main marshaling stations in our country.Therefore,it's important to study on the factors of the truck assembly process and its impact,to take effective measures to accelerate the truck assembly process,for compression truck assembly time.This paper is on the basis of analyzing some factors affecting the accumulation parameter of freight cars.Firstly,taking Dalian Jinzhou marshaling yard as an example,In this paper as two groups of random variables of number and arrival interval time of train-sets are fitted by means of mathematical statistics and probability theory,reference railway transport organization theory according to direction in the uncertain conditions,the random distribution types and parameters are determined according to the fitting results.Then,the thesis is based on determined the distribution of random variables and parameters and established the downward engendering field model for logical simulation of disassembly accumulation organization departure of freight train by AnyLogic software,and the output of the simulation model and the actual survey data were analyzed and compared,to verify the model validation.Finally,to design simulation experiment scheme analyzing three factors:number,arrival interval time and group number of train-sets which influence the assembly parameters of freight cars deeply,and fitting the accumulation parameter of freight cars changed with the three influencing factors on the basis of previous.