Research On The Rational Quantity Of The Port Handling Machinery

Port handling machinery is the material guarantee for port handling and storage, and the great part of port fixed assets. So port machinery management is important for modern port. How to control the quantity and structure is the primal problem. In this paper I calculate the reasonable possession quantity of port handling machineries with chance-constrained linear programming.First in the paper is the background and meaning of this research; Then analysis present situation of port machinery management both in practice and theory; In chapter 3, I qualitatively discusses characters influencing machinery quantity, which include lifting ton, intact rate and using rate, age of machinery, machinery purchase and working cost and so on. In chapter 4, I take the influencing characters to mathematic model of chance-constrained linear programming, aiming to maintain the need of production and reduce machinery cost. In chapter 5,1 choose Dagang Company as typical port to apply the model. First I statistic the history data, and fitting the distribution of maintenance and repair cost, then calculate the reasonable quantity of forklift. The results prove that this model is correct and is useful for the port machinery management.