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Application of ADINA to stress analysis of an optical ground wire

机译：ADINA在光地线应力分析中的应用

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摘要

Ground wires are metallic wires used in overhead power lines to protect the line conductors against lightning. An optical ground wire (OPGW) is composed of an envelope of one or two layers of metallic helical strands wound around a core containing optical fibers. In most OPGW constructions, the fibers are designed to be stress free or to experience only low stresses under normal operation loads. A three-dimensional finite element model of a cable was constructed t predict the stress distribution in each component when the cable is subjected to a given elongation. Modeling considerations are discussed, which pertain to geometric modeling and meshing, boundary conditions, contact and numerical methods. Results of stress analysis are presented in some detail for two examples; six wires and ten wires wound around a central tube. The results are compared with analytical approximate solutions available in the literature dating from 1973.
机译：接地线是架空电力线中使用的金属线，用于保护线路导体免受雷击。光学接地线（OPGW）由一层或两层金属螺旋线的包层组成，这些层缠绕在包含光纤的纤芯上。在大多数OPGW结构中，光纤被设计为无应力或在正常运行负载下仅承受低应力。构建了电缆的三维有限元模型，以预测电缆在给定伸长率下每个组件中的应力分布。讨论了建模注意事项，涉及几何建模和网格划分，边界条件，接触和数值方法。给出了两个示例的应力分析结果。六根电线和十根电线缠绕在中心管上。将结果与1973年以来文献中提供的分析近似解决方案进行比较。

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