Study On Working Reliability About The Sorting And Marshalling Subsystem Of The Marshalling Station

Recently,the unbalanced status of train flow can be explained that trains arrive and leave a station densely on the different time periods.which requests highly emphasis in a marshalling station's work.as completing main function of marshalling yard,the sorting and marshalling subsystem play an important role in it.the working reliability of the sorting and marshalling subsystem is a primary target to evaluate the capacity and unremittance of the sorting and marshalling operation.so,it is very useful to realize the betimes and security of station and unblock railway nerwork.Making the definition of working reliability about sorting and marshalling subsystem.by applying system thought and reliability theory,the function and queuing characteristics of subsystems is showed.based on research object,application condidtions,given time and given function, the definition of working reliability is proposed.the working reliability of sorting subsystem is the ability,which lead to the sorting subsystem completes dissoluting operation timely and arrival trains enter into a receiving yard unremittingly on the real work.the working reliability of marshalling subsystem is the ability,which lead to the marshalling operation is completed timely and the dissoluting operation can be proceed unremittingly on the real work.By using the queuing theory and stochastic process theory,quantitative analyzing the working reliability of sorting and marshalling subsystem according to the relationship of inputted trains and capacity of subsystems.in this process, working reliability calculation method to subsystem' s fulled line state can be researched in detail by utilizing the phase method and the renewal process theory, specific formulas of subsystems working reliability is deduced under some queuing model that appear possibility are M/M/1/∞,Ek/M/1/∞,M/Er/1/∞,Er/Ek/1/1/∞,M/M/C/N and M/Ek/C/N。Analyzing example.fristly,by investigation to the inputted trains flow and operation time of sorting and marshalling down subsystem of ZhengZhou north station,this paper show that the statistical distribution supposition with the trains flow arrival interval and operation time are carried,and which is examined using the mathematical statistic method. Secondly,numerical results of working reliability are easy to implement by using the calculation formula that has been deduced.lastly,measures improving the working reliability of sorting and marshalling subsystem are preliminary studied from aspects of subsystem capacity and operation organization.