线夹回转式导线阻尼间隔棒防舞机理与模态分析

线夹回转式导线阻尼间隔棒已经大量运用到超高压和特高压输电线路中,但该种间隔棒的防舞效果需要进一步研究.根据间隔棒的设计原理与参数,研究和验证间隔棒的防舞机理.线夹回转式导线阻尼间隔棒的部分线夹可转动,使得子导线可绕其自身轴转动,从而使覆冰导线截面形状均匀,起到了舞动抑制作用.利用ANSYS软件,建立了导线间隔棒体系的三维有限元模型;通过导线间隔棒体系的模态分析,得到导线阻尼间隔棒体系前6阶模态的固有频率和固有频率振型图.固有频率和振型图分析结果表明,线夹回转式导线阻尼间隔棒具有较好的防舞作用,在此基础上,提出线夹回转式导线阻尼间隔棒的工程应用建议.

Anti-Galloping Mechanism and Modal Analysis on Rotary Clamp Conductor Spacer-Damper

： Though the rotary clamp conductor spacer-dampers have been widely used in extra high voltage （EHV） and ultra high voltage （UHV） transmission lines, the anti-galloping effect of this kind of spacer still needs to be studied. According to the design and parameters of spacer-damper, the anti-galloping mechanism of the spacer had been researched and verified. Since part of the rotary clamp conductor spacer-damper can rotate, so that the sub-conductor can rotate around its own axis, therefore the cross-section of iced conductor becomes uniform, which plays a role of galloping inhibition. Moreover, a three-dimensional finite element model of the conductor spacer system was established by means of ANSYS software. Based on the modal analysis of the conductor spacer-damper system, the natural frequencies and their vibration mode graph of the first 6 modes of this conductor spacer-damper system were obtained. According to the analysis of the natural frequencies and vibration types, it shows that the rotary clamp space-damper has a better effect on anti-galloping. On this basis, a suggestion for engineering application of this rotary clamp conductor spacer-damper was proposed.