Wind-induced dynamic response and vibration control of steel tubular tower in the 1000 kV large span crossing transmission line

A finite element model with ANSYS was created for an analysis of wind-induced response and vibration control of steel tubular tower in the 1000 kV large span crossing transmission line. Randomly fluctuating wind on spatial joints of the model was simulated using Davenport spectrum. Based on analysis of tubular tower dynamic characteristics and wind-induced response, three vibration control systems were used: tuned mass dampers(TMD), viscoelastic dampers(VED), TMD-VED were discussed to assess the vibration isolation effectiveness of vibration countermeasures in large-span crossing transmission tower. The result demonstrates that the damping performance of TMD is better than the VED, with limited significance, having adverse effects of dynamic magnification in accident causes. TMD with small mass in TMD-VED system offers limited effect for control torsional vibration. It is further shown that, VED is most viable method for reduction of wind-induced response, providing an approximately 9%~13% reduction of displacement responses and 20%~30% reduction of acceleration responses on tower body.