两种跨越轨道防护装备主塔在扭转工况下的强度分析

Strength Analysis of Two Main Towers of Cross-track Protective Equipment under Torsional Condition

综述了输电线横跨轨道面临的问题,介绍了跨越轨道防护装备的安装流程。针对在沿铁路方向的风载作用下,防护装备的横梁及副塔跨越轨道至与轨道方向垂直时骤停这一扭转工况,计算防护装备的受力载荷,对两种防护装备主塔进行有限元计算。计算结果表明:改良设计后的主塔满足此扭转工况的应用要求,开口式桁架与封闭式桁架组合的乙形桁架结构可有效地提高装备的抗扭性能。

In this paper,the problems faced by transmission lines across the track are summarized,and the installation process of cross-track protective equipment is introduced.When by the acfion of wind load in the direction of the railway,the crossbeam and the sub-tower of the protective equipment cross the track to the torsional condition and the crossbeam and the sub-tower is perpendicular to the track direction,the force load of the protective equipment is calculeded,and two main towers of the protective equipment are calculated by the finite element method.The calculation results show that the improved main tower meets the application requirements of the torsional condition,and the zigzag truss structure combined with the open truss and the closed truss can effectively improve the torsion resistance of the equipment.