摘要
针对抗冰过载保护金具生效后对输电线路的影响,以SZ1双回直线塔为例,建立三塔四线的有限元模型。采用非线性有限元找形方法找形,分析塔线体系在均匀覆冰、不均匀覆冰下铁塔的极限承载力,确定塔线分离控制荷载。结果表明,抗冰过载保护金具生效时导线脱落引起的冲击力,可使相邻杆塔和本塔预安装的抗冰过载保护金具生效,使导线脱落完成卸载,起到了保护铁塔的作用。
Taking SZ1 double circuit tangent towers for an example, in view of the anti-icing overload line fitting impact on the transmission lines, the finite element model of rowe-transmission lines system is established. A form-finding method is proposed by using nonlinear finite element method. The ultimate load capacity of the transmission tower is calculated under the conditions of uniform icing and non-uniform icing. And then load of controlling tower-transmission line separation is determined. The calculation results show that when the anti-icing overload line fittings become effective, the impact force caused by the wire loss can make the anti icing overload line fittings of adjacent tower pre-installed effect so that the wire is dropped and the unloading is completed, which protects the steel towers.
出处
《水电能源科学》
北大核心
2013年第8期177-180,203,共5页
Water Resources and Power
关键词
塔线体系
找形
防灾
导线脱落
冲击
tower-transmission line system
form-finding
disaster prevention
transmission line drop
impact
