保全データ等によるガントリー・クレーン・ワイヤロープの統計的解析

Abstract

Though a gantry crane (GC) is indispensable for loading and unloading cargo on to a ship, there have almost never been reported about its characteristics of reliability and maintainability from the practical and statistical viewpoint. Therefore, the object of this paper is to make clear the relationships among the method, policy and reasons of replacement of wire rope which is the most important part in GC. We pick up the data of the wire rope from many parts which compose GC and then analyze its maintenance data through the Weibull probability paper and Weibull type of the cumulative hazard paper. First we discuss the outline of maintenance method of the wire rope based on the theoretical equations and next propose newly the statistical analysis of the data gathered from the maintenance field. Finally, we show that the results obtained here have very useful information about the relationship between the maintenance method and the cumulative number of cargo dealt with GC.