Abstract
Taking a 110 kV transmission line as the research object, a refined finite element model of three pole two line transmission tower line system is established.Considering collision and contact between a dropped wire and ground, nonlinear dynamic analyses of the system with different break points and different numbers of broken wires were performed. The results showed that the break point location has little effects on the impact action of broken wire; the tension decay coefficient of the broken wire decreases with increase in the height of the hanging point position, while that of the unbroken wire decreases first and then increases with increase in the height of the hanging point position. The initial pretension, wind direction angle and span of the cable are selected for parameter analysis. The influence of these parameters on the nonlinear dynamic stability critical load of the hollow mezzanine concrete pole line system is investigated.
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