放线光缆强弯曲状态建模与特征分析

针对放线光缆放线剥离点附近的强弯曲状态可能引发光缆断纤的问题,在建立光缆运动姿态数学模型的基础上,对光缆剥离点处曲率半径和弯曲弧长的分布情况进行了研究。重点讨论了剥离点处曲率半径和弯曲弧长与剥离点位置、剥离段光纤所在缠绕层的半径、光缆放线速度、光缆线密度等光纤特征参量之间的变化关系,并对曲率半径最小值位置的具体讨论。结果表明,在对应试验条件下,放线过程中剥离点处光缆的曲率半径存在极小值,其大小约为1.2mm,与光缆缠绕层半径、放线速度几乎无关。而曲率半径和弯曲弧长会随剥离点位置、放线层、放线速度、光缆线密度的改变发生变化。

Modeling and Characteristics Analysis of Strong Bending State of Fiber Optical Cable

Aimed at the strong bending condition of optical fibers near the stripping points probably leads the fibers to break, the distribution of the bending radius and the bending length near the fibers` stripping points are calculated and analyzed on the basis of the mathematics model of the unreeling kinematic attitude of the optical fiber cable during weapon flight movement. The relationship between the above two geometric quantities and the position of the stripping point are researched. And some other optical characteristic parameters such as the radius of the winding player, speed of the payout optical cable, line density of the optical cable are also studied respectively. The result indicates that the radius of curvature at the stripping point exist a minimal value 1.2 mm, and the value of the minimum almost has nothing to do with the above parameters. However, the bending radius and the bending length will be changed with the diversification of the stripping points location, payout layer, speed and fiber cables linear density.