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研究了输电塔线体系风振控制的能量评估问题.采用多自由度模型建立了输电塔线体系动力分析模型和磁流变(MR)阻尼器的力学模型,研究了安装有MR阻尼器的塔线耦联体系的动力分析模型和受控运动方程,并采用局域反馈的固定增量半主动控制策略来实现输电塔结构风振反应的半主动控制.提出了设置有MR阻尼器的输电塔结构风振反应的能量评价标准并将其应用于某大跨越输电塔线体系的风振控制.分析表明:MR阻尼器可以有效地抑制输电塔结构的风振反应,通过能量评定方法可以准确地考察不同控制方法的控制效果.
The energy evaluation of wind-induced vibration control in transmission tower system is studied.The dynamic analysis model of transmission line system and the mechanical model of MR damper are established by using multi-degree-of-freedom model, and the tower with MR damper The dynamic analysis model and the controlled equations of motion of the linear coupling system are established and the semi-active control of the wind-induced vibration response of the transmission tower is achieved by using the fixed incremental semi-active control strategy with local feedback. A transmission tower with MR damper The results show that the MR damper can effectively suppress the wind-induced vibration response of transmission tower structure, and the energy assessment method can accurately predict the wind-induced vibration response of the transmission tower structure. Investigate the control effects of different control methods.