基于TMD的通信铁塔结构风振控制研究

Research on wind vibration control of communication tower structure based on TMD

5G通信时代的到来对通信铁塔结构可靠性提出了更高要求.为控制铁塔风致振动,以工程中某35 m高通信铁塔为研究对象,根据实际场地条件,基于线性滤波法生成风速时程,分别计算铁塔在规范风荷载和时程风荷载下的结构响应,并对比验证;最后引入TMD装置对铁塔进行风振控制设计与研究.结果表明,通过线性滤波法生成风速时程并计算通信铁塔风致响应,与规范风荷载计算结果吻合度很高;同时,建议该通信铁塔采用环形三向TMD装置,且在推荐的TMD设计参数下,2种典型工况的塔顶位移控制效果可分别达到11.85%和12.01%,其基底剪力控制效果可分别达到10.26%和10.18%。

The arrival of the 5G communication era puts forward higher requirements for the reliability of communication tower structure.In order to control the wind-induced vibration of the tower,a 35 m high communication tower in the project is taken as the research object.According to the actual site conditions,the wind speed time history is generated based on the linear filtering method,and the structural responses of the tower under the standard wind load and time history wind load are calculated and compared.Finally,the TMD device is introduced to design and study the wind-induced vibration control of the tower.The results show that the wind speed time history is generated by the linear filtering method and the wind induced response of the communication tower is calculated,which is in good agreement with the calculated results of the code wind load.At the same time,it is recommended that the communication tower adopt a circular three-way TMD device,and under the recommended TMD design parameters,the top displacement control effects of the two typical working conditions can reach 11.85%and 12.01%respectively,and the base shear control effects can reach 10.26%and 10.18%,respectively.