摘要
通过对钢管头、尾增厚端壁厚进行测量,对其分布形态进行回归分析,模拟出了头、尾增厚端壁厚变化规律的线性和非线性数学模型,并对二者的拟合精度进行比较。比较后发现,以减径率、平均张力系数作为线性模型的主要影响因素时,增壁率的拟合精度高,增厚端长度的拟合精度较差;但采用非线性模型进行拟合时,增厚端壁厚和长度的拟合精度都非常高。这为实际生产中切头、尾长度的预报提供了理论依据。
Based on the measurement of the wall thickness of the tube head/tail end thickened sections,and the regression analysis of the thickness distribution pattern,simulation linear and non-linear mathematical models of the variation rules for the said tube-end thickening phenomenon are set up,and the fit accuracies of them are compared.The result of the comparison shows that with the diameter-reduction rate and the average stretch factor as the key influencing elements for the linear model,the fit accuracy of the wall thickness increase rate is rather high,but that of the thickened section length is rather poor.However,in case of fitting with the nonlinear model,fit accuracies of both the wall thickness and length of the tube-end thickened section are considerably high.This conclusion is worthy using as a theoretic basis for proper control of tube cropping operation.
出处
《钢管》
CAS
2011年第3期22-26,共5页
Steel Pipe
关键词
钢管
壁厚
增厚端
数学模型
拟合精度
Steel tube
Wall thickness
Thickened end
Mathematical model
Fit accuracy
