特高压跨越施工封网结构力学分析

发布时间：2018-03-23 21:23

本文选题：跨越施工　切入点：封网　出处：《东北电力技术》2017年04期

【摘要】：封网结构对于保障特高压跨越输电线路施工安全具有重要意义,其具有较高的技术和施工要求,但目前对于其研究大多简化为单索计算。为与实际状态更符合,考虑绝缘撑杆及网的影响,利用有限元软件建立封网结构模型,对封网结构在不同工况下的力学性能进行分析。研究结果表明:随档距增大,承载索弧垂和最大张力均增大;随预紧力增大,承载索弧垂与最大张力分别呈线性减小与增大;随承载索间距增大,弧垂和张力也明显增大;随承载索直径增大,会使封网装置与被跨物的安全距离更得到保障,但承载索最大张力会显著增大;全封网形式承受冲击荷载的能力显著强于局部封网。
[Abstract]:The sealing network structure is of great significance to ensure the construction safety of UHV transmission lines. It has high technical and construction requirements, but at present, most of the research on it is simplified to single cable calculation, which is more consistent with the actual situation. Considering the influence of insulation braces and nets, the finite element software is used to establish the sealing structure model, and the mechanical properties of the sealing structure under different working conditions are analyzed. The results show that with the increase of the spacing, the sagging of the bearing cable and the maximum tension increase; With the increase of pretension force, the sagging and maximum tension of the bearing cable decrease and increase linearly, respectively; with the increase of the distance between the loaded cables, the sag and the tension also increase obviously; with the increase of the diameter of the bearing cable, the sagging and tension of the bearing cable increase. The safety distance between the sealer and the traverse will be more guaranteed, but the maximum tension of the bearing cable will increase significantly, and the ability of the whole sealing network to withstand the impact load is obviously stronger than that of the partial sealing.
【作者单位】：合肥工业大学土木与水利工程学院;安徽省送变电工程公司;国家电网公司交流建设分公司;
【基金】：国家电网公司科技项目资助(SGHEJY00TGJS1600057)
【分类号】：TM752

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