不同加载方式对输电铁塔风致响应的影响

为了评估高压输电塔线体系在强风作用下的安全性能，采用数值模拟方法研究不同建模思路对杆塔力学性能的影响。首先，采用ABAQUS软件建立了500 kV输电线路“一塔两档线”的有限元模型，并利用Kaimal谱模拟随机风速。然后分别建立塔线分离、塔线耦合动力加载方式和等效静力加载方式三种风致响应模型，研究典型工况下不同加载方式对杆塔力学性能的影响。结果表明，三种模型得到的危险区域一致，仅最大数值稍有差异。塔线耦合效应会使杆塔的应力、位移响应波动频繁，采用动力学加载的结果数值均大于等效静力加载，但等效静载模型计算效率最高，可作为后续杆塔轴力计算和螺栓松动研究的优先选择。

Influence Research on Different Loading Modes for Wind-Induced Response of Transmission Towers

To evaluate the safety performance of extra high voltage transmission tower-line systems under strong wind, the influence of different modeling ideas on the mechanical performance of a tower is systematically studied by numerical simulation. Firstly, the finite element model of "one tower and two-span lines" in a 500 kV transmission line was established by using ABAQUS software, and the Kaimal spectrum was used to simulate fluctuating wind speed. Then tower-line separation, tower-line coupling models under dynamic loading, and the equivalent static loading model were established for wind-induced response research. The mechanical properties of the tower under different loading modes were studied under typical working conditions. The results show that the dangerous parts obtained by the three models are consistent, but the maximum stresses are slightly different. The coupling effect of the tower and line makes the stress and displacement response of the tower fluctuates frequently. Although the results of dynamic loading are all greater than the equivalent static loading, the equivalent static model can be used as the main priority for subsequent axial force calculation and bolt loosening research.