平行钢丝拉索Daniel效应分析

Analysis of daniel effect for parallel wire cable

为了研究平行钢丝拉索丹尼尔效应随钢丝数的变化规律，以85φ5mm钢丝拉索索力仿真计算为例，采用蒙特卡罗法分析了不同钢丝数目平行钢丝索的丹尼尔效应。应用Matlab软件生成钢丝抗拉强度随机样本，引入矩阵计算简化分析过程。通过回归分析得出拉索丹尼尔效应计算的计算式。研究结果表明，拉索钢丝抗拉强度的平均值、标准差及衰减因子随钢丝数增加而减小，其衰减规律服从多项式分布；当钢丝数在10—50之间时，拉索丹尼尔效应十分显著；当钢丝数在50—100之间时，丹尼尔效应逐渐减弱；当钢丝数大于100以后，随着拉索钢丝数的增加，钢丝的平均抗拉强度衰减缓慢，拉索丹尼尔效应趋于稳定。

In order to study the regularity that Daniel effect changes with different numbers of wires, the simulating calculation of a cable consisting of 85 wires was taken as the studying case. Through the simulating calculation, the Daniel effect of cables consisting of different numbers of parallel wires was analyzed. The software Matlab was used to create the random samples of tensile strength for steel wires, and the matrix calculation was introduced to the analysis process. Through regression analysis, the calculating formulas of Daniel effects were deduced. The results indicate that the average tensile strength, attenuation factor of tensile strength and its standard deviation are attenuated with the increase of the number of wires, and that the attenuating regularities follow polynomial curves; with the increase of wire numbers from 10 to 50, the Daniel effects are obvious; when the wire numbers increase from 50 to 100, the Daniel effects attenuate gradually; with the wire numbers above 100, the Daniel effects of cables drive to stabilization.