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为了研究风雨作用下被动减振装置对输电塔-线体系的控制效果,基于调谐质量阻尼器原理,设计了双向调频减振装置。利用有限元软件SAP 2000建立了输电塔-线体系有限元模型;通过线性滤波法模拟了脉动风速时程;根据降雨形成特征和雨滴谱与强降雨的关系,运用力学平衡和动量定理,得到了雨荷载;根据风雨荷载的组合原则,得到了风雨荷载的时程曲线。运用非线性动力时程分析方法,验证了该双向调频阻尼装置的有效性。
In order to study the control effect of passive vibration reduction device on transmission tower-line system under the action of wind and rain, a bidirectional frequency modulation vibration reduction device is designed based on the principle of tuned mass damper. The finite element model of transmission tower-line system was established by finite element software SAP2000. The time history of pulsating wind speed was simulated by linear filtering method. According to the characteristics of rainfall formation and the relation between raindrop spectrum and heavy rainfall, the mechanical equilibrium and momentum theorem were used to obtain the Rain load. According to the combination principle of wind and rain load, the time-course curve of wind-rain load is obtained. The nonlinear dynamic time history analysis method is used to verify the effectiveness of the two-way FM damping device.