结冰导线扭转刚度实验

在结冰导线的舞动中，结冰导线的扭转起着非常重要的作用，因此研究结冰导线的扭转刚度对深入研究结冰导线的舞动机理有重要意义。根据结冰导线舞动机理的研究现状，在6种导线结冰的类型中选取近似于硬雾凇的冰型，在繁多的结冰导线的截面形状中选取新月形为结冰导线试件的结冰横截面的形状。结冰导线试件的型号是LGJ～300/40，结冰导线试件的标距是500mm。结冰导线试件分为2组，新导线为l组，已完成蠕变的旧导线为1组，每组的试件为11根。每组试件的冰厚分别为0、3、6、9、12、15、18、21、24、27、30mm。给结冰导线试件加载的设备是NJ—100型扭转试验机。给出了2组结冰导线试件分别在4种冰厚下的扭转刚度实验曲线，用最小二乘法拟合出结冰导线的扭转刚度随冰厚变化的公式，并给出了最简公式。

Tests on tensional stiffness of iced conductor

In iced conductor's galloping, its torsion is a important factor, therefore, it is having important meaning to study tensional stiffness of iced conductor to research further the mechanism of iced conductor's gallop. Hard rime was selected in six kinds of ice and new moon form was selected as the form of section of iced conductor in many forms according to present condition of researching the mechanism of iced conductor's gallop. The type of conductor in test models was LGJ-300/40 and the standard length of test models was 500 mm. Test models were divided into two groups, conductor being new in one, being old that wriggling had completed in other. The device loading on test models was NJ-100 tensional machine. Ice thickness of test models in two groups were 12,14,16,18,20,22,24,26,28,30 mm. The results of test models in two groups are showed in picture. The formulas describing tensional stiffness of iced conductor with ice thickness are derived from least squares method, based on which the simplest formulas are given.