双分裂导线分裂间距对次档距振动的影响

Impact of Bundle Spacing on Subspan Vibration of Double Split Conductors

针对采用风洞试验研究双分裂导线分裂间距对次档距振动存在费用高、周期长和试验模型与实际问题的一致性难以确定等缺陷,利用simulink模块对导线次档距振动进行仿真,发现分裂导线次档距振动为椭圆型的简谐振动,为此采用计算流体力学fluent软件模拟分裂导线周围的空气流场,通过对阻力和升力系数的分析来判断导线受力情况,从而得到导线的振动规律。结果表明,当分裂导线间距与导线直径的比值在10～16之间时,导线间距对次档距的振动在可接受范围内,且fluent软件仿真结果与风洞试验结果相吻合。

There are problems for study the impact of split spacing on the subspan vibration of double split conductors by the wind tunnel experiment, such as high cost, long period and difficult consistency of the test model and the actual situation. The subspan vibration of conductors is simulated by using simulink module. It found out that subspan vibration of split conductors is elliptic simple harmonic oscillation. So, the computational fluid mechanics software fluent is used to simulate the air flow field around the split conductors. At the same time, wire force is determined by analyzing the drag coefficient and the lift coefficient. Thereby, the vibration laws of the conductors are obtained. The results show that when the ratio of the split wire spacing and wire diameter is between 10 to 16, the wire spacing of the subspan vibration is within an acceptable range; further more, fluent software simulation results is consistent with the wind tunnel test.