张力对大跨越输电导线Bate阻尼线防振影响研究

为了掌握张力对输电导线Bate阻尼线体系的微风消振效果影响，采用能量平衡法分析了输电导线Bate阻尼线体系的微风振动特性。结合IEEE输电导线振动测试指南，设计制作了输电导线Bate阻尼线体系消振特性试验模型，分析了安装Bate阻尼线前后的输电导线微风振动特性，研究了张力变化对大跨越输电导线防振效果的影响规律。结果表明：①Bate阻尼线可有效地降低导线的微风振动幅值，但单花边Bate阻尼线的消振效果有限，大跨越输电线路需要多花边Bate阻尼线组合防振；②张力可改变输电导线的防振特性，对其微风防振效果影响较大；③导线张力由18%RTS增大到25%RTS时，对于未安装Bate阻尼线的裸导线位移呈现先增大后减小的趋势，但对于输电导线Bate阻尼线体系，张力由18%RTS增大到22%RTS时，在不同激励频段，其振动位移变化趋势并不一致，张力增大到25%RTS时，和未安装Bate阻尼线的裸导线一样，振动位移呈现减小趋势。

Effect of Tension on Vibration Resistance of Long-Span Transmission Line with Bate Damping Line

In order to understand the effect of tension on the wind-induced vibration of transmission line-Bate damping line system, the energy balance method is used to analyze the wind-induced vibration characteristics of the system. Combining with IEEE transmission line vibration test guide, a test model of transmission lineBate damping line system is designed. The characteristics of transmission line under breeze vibration before and after installing the Bate damping line are analyzed, and the influence of tension variation on the anti-vibration effect of long-span transmission line is studied. The results show that: (1) The amplitude of breeze vibration of the conducting wire can be effectively reduced by the Bate damping line, but the damping effect of the single lace Bate damping line is limited. The long-span transmission line needs the combination of multiple lace Bate damping lines to prevent vibration. (2) Tension forces can change the vibration resistance characteristics of transmission lines, and has a great influence on its anti-vibration effect. (3) When the tension force of the conducting wire increases from 18% RTS to 25% RTS, the displacement increases first and then decreases for the bare conducting wire without a Bate damping line. But for the transmission lineBate damping line system, when the tension force increases from 18% RTS to 22% RTS, the variation trend of vibration displacement is not consistent under different excitation frequency bands. When the tension force increases to 25% RTS, the vibration displacement decreases, consistent with the bare conducting wire without the Bate damping line.