光纤的机械可靠性及寿命评估

Mechanical Reliability and Life Evaluation of Optical Fiber

为了探究延长光纤机械寿命的关键技术,研究了光纤机械可靠性及寿命评估模型。影响光纤机械寿命的主要因素是光纤裂纹生成和光纤裂纹在应力腐蚀下不断生长。根据光纤机械强度计算公式以及光纤疲劳试验的威布尔分布特性,建立光纤筛选实验寿命评估模型。运用该寿命评估模型对OPGW(光纤复合架空地线)线路寿命进行模拟计算和评估,探究了延长OPGW线路寿命的关键技术。结果表明,提高光纤疲劳参数和降低光纤使用时的应力水平,均可显著提高光纤寿命。

In order to explore the key technology to extend the life of fiber mechanical, we study the optical fiber mechanical reliability and life evaluation model. The main factors affecting the mechanical life of the fiber is the crack generated under the stress corrosion and the continuous grow of the crack. According to the Weibull distribution characteristics of the fiber mechanical strength calculations and fatigue test, we establish life assessment model for optical fiber screening experiments. The use of life assessment model for OPGW line life are simulated and evaluated to extend the life of OPGW line of key technologies. The results show that the life expectancy can be improved by increasing fiber fatigue parameters and reduce the stress level.