架空线路碳纤维复合芯导线舞动特性实验

将风激励作用转换为导线长度的周期变化,对单档距架空线路碳纤维复合芯导线无覆冰时的舞动特性展开了实验研究。与实验研究对应,用两端简支柔索结构参数共振模型对横向风载激发的导线舞动现象进行模拟。对具有相同截面尺寸的碳纤维复合芯导线和钢芯铝绞线的舞动现象进行了对比分析,从参数共振动力不稳定区域的角度解释了实验观测到的不同激振频率下两种导线系统的舞动模态。结果表明,在相同静态张力加载下,相同截面尺寸的碳纤维复合芯导线相比于传统钢芯铝绞线更不易发生舞振现象。

Experimental Research on Galloping Properties of Carbon Fiber Composite Core on Overhead Line

An experimental research on the galloping properties of carbon fiber composite core without ice-covered of single span overhead line is developed by converting the wind excitation to periodic variation of the wire length. Corresponding with experimental research, a parametric resonance model of simply-supported cable structure is adopted to simulate conductor galloping induced by transverse wind load. The galloping phenomenon of aluminum cable steel reinforced and carbon fiber composite core with same cross-section dimensions and load conditions is compared and analyzed. The galloping modes for two cable systems under different exciting frequencies observed by experiment are explained from the perspective of parametric resonance dynamic instability region reasonably. The experimental results show that under the same static tension loading, compared to the traditional aluminum cable steel reinforced, carbon fiber composite core with the same cross-section size is more difficult to be galloping.