风荷载作用下输电塔TMD及ATMD风振控制对比研究

Comparative Study on Wind Vibration Control of Transmission Tower with TMD and ATMD Under Wind Load

针对输电塔风振响应过大的问题,建立输电塔风振控制分析的多质点模型,通过三维有限元计算检验了模型的准确性;采用谐波叠加法及准定常假设生成考虑竖向空间相关性的输电塔多点风荷载时程,对加装调谐质量阻尼器(tuned mass damper,TMD)的输电塔进行风荷载作用的减振效果分析,研究了在最小质量比条件下TMD最优刚度和最优阻尼参数,探讨了单摆式TMD和悬臂梁式TMD的弹性元件尺寸及在输电塔上安装的可行性;最后采用线性二次型调节器(linear quadratic regulator,LQR)最优控制理论对加装主动调谐质量阻尼器(active tuned mass damper,ATMD)的输电塔进行减振效果分析。结果表明,优化后的TMD几乎达到了与ATMD一样的减振效果。

To solve the problem of overlarge wind vibration response of the transmission tower, this paper builds a multi-par- ticle model for wind vibration control analysis and has verified accuracy of the model by 3D finite element calculation. It a- dopts the harmonic superposition method and quasi-steady assumption to generate multipoint wind load time-history consider- ing correlation of vertical space. It analyzes vibration damping effect of wind load for the transmission tower with the tuned mass damper （TMD）, studies the optimum stiffness and damping parameters of the TMD under the condition of the mini- mum mass ratio and discusses dimensions of elastic components of pendulum-type TMD and cantilever-type TMD as well as feasibilities of installation of these two kinds of TMD on the transmission tower. Finally, it analyzes vibration damping effect for the transmission tower with the active tuned mass damper （ATMD） on the basis of optimum control theory of line- ar quadratic regulator （LQR）. Corresponding results indicate the optimized TMD has almost the same vibration damping effect as the ATMD.