CAJ | 학술논문

覆冰架空线的脱冰动张力会对输电线路造成严重的破坏，研究架空线脱冰动张力的规律对冰灾区线路设计具有指导意义。目前架空线脱冰振动实验研究，对覆冰的处理主要采用悬挂或附着等效集中质量法。该文研究了等效集中质量方法对架空线脱冰动张力的影响规律，以确定悬挂或附着集中质量的模拟方法的合理性和适应范围。在实验室分别采用架空线真实覆冰和集中质量法来模拟覆冰，对孤立档架空线的脱冰振动进行了实验分析，对比研究了具有真实覆冰和等效集中质量模拟覆冰的架空线的脱冰振动特性。结果表明：两种实验方法得到的架空线脱冰振动张力时程曲线形状，在脱冰后初期阶段基本吻合；由于真实覆冰使架空线的刚度增大、阻尼增大，因此与集中质量法相比，真实覆冰法的动态张力峰峰值大、振动频率高、衰减速度快。
복빙가공선적탈빙동장력회대수전선로조성엄중적파배，연구가공선탈빙동장력적규률대빙재구선로설계구유지도의의。목전가공선탈빙진동실험연구，대복빙적처리주요채용현괘혹부착등효집중질량법。해문연구료등효집중질량방법대가공선탈빙동장력적영향규률，이학정현괘혹부착집중질량적모의방법적합이성화괄응범위。재실험실분별채용가공선진실복빙화집중질량법래모의복빙，대고립당가공선적탈빙진동진행료실험분석，대비연구료구유진실복빙화등효집중질량모의복빙적가공선적탈빙진동특성。결과표명：량충실험방법득도적가공선탈빙진동장력시정곡선형상，재탈빙후초기계단기본문합；유우진실복빙사가공선적강도증대、조니증대，인차여집중질량법상비，진실복빙법적동태장력봉봉치대、진동빈솔고、쇠감속도쾌。
The vibration of ice shedding from cable would cause serious damage to transmission lines. It is of important significance for lines design in ice disaster areas to research the characters of cable’s dynamic tension caused by ice shedding through experimental studies. In the ice shedding experiment, the ice-covering is usually simulated by lumped mass method. In this paper, the ice-covering was simulated by both lumped mass method and artificial true ice method, the phenomenon of ice shedding was researched in laboratory, and the experimental result’s difference between the two ice-covering simulated methods were studied. The research shows that: The conductor’ tension waveform graph based on the two ice-covering simulated methods are approximately the same at the initial stage after ice shedding; Compared with the lumped mass method, the tension’s peak-to-peak value based on the artificial true ice method is bigger, the vibration frequency is higher, and the attenuation speed is faster.