Mann-Kendall法在连轧管机轧制力趋势分析中的应用OA

During the seamless steel tube rolling process with the mandrel mill,the rolling force,as a critical par-ameter,exhibits a variation trend that holds significant importance for analyzing rolling effect and predicting the equipment performance.The Mann-Kendall method as used for the non-parametric statistical test,does not require the sample to follow a specific distribution,and is particularly suitable for detecting abrupt changes and trend variations in time series.It is proposed here in the essay that the Mann-Kendall method can be used to identify potential abrupt changes in the rolling force time series,determine the timing of such changes,and validate the findings via actual production data.The result demonstrates that this method not only offers computational simplicity,but also enables clear identification of incre-asing or decreasing trends and potential abrupt change points in the rolling force time series,thereby providing robust support for optimizing rolling processes,enhancing equipment stability,and improving production efficiency.