中文摘要：

约束阻尼层是机械及航空工程中常用的阻尼减振方法之一。讨论了在1000kV特高压输电线路典型钢管塔应用约束阻尼层的风振控制问题。首先给出了粘弹性阻尼材料的基本力学特性和约束阻尼层的两种有限元建模方法。通过ANSYS对一简单约束阻尼层结构采用两种不同有限元模型进行数值仿真分析比较，给出了在ANSYS中准确模拟这类结构的途径。应用这一建模方法对钢管塔主材安装约束阻尼层后的减振效果进行了数值仿真。结果表明，在主材设置约束阻尼层后杆塔一阶纵向和一阶横向弯曲模态阻尼比均有较大提高，但扭转模态的模态阻尼比提高很少。时域风振分析表明，设置约束阻尼层后塔顶的顺风向加速度响应显著降低。最后从结构及阻尼层的模态应变能角度建议了阻尼材料及约束阻尼层设置部位的选取原则。

英文摘要：

Constrained layer damping is one of methods for vibration mitigation commonly used in mechanical and aerospace engineering. This study deals with the application of constrained layer damping for wind-induced vibration control o{ the typi- cal lattice towers with circular cross section in a 1 000 kV ultra-high-voltage transmission line. The mechanical properties and two kinds of finite element models in ANSYS for modeling the constrained layer damping are first described. The correct modeling technique to analyze the dynamic parameters of a structure treated with constrained layer damping is determined by comparing the results of the two numerical models with analytic solutions for a simply-supported plate with damping treat- ment. With this modeling technique, the numerical simulation of vibration control performance by attaching constrained layer damping at parts of four major tower columns of transmission line tower is carried out. The damping ratios of flexural modes for the tower with damping treatment increase greatly, indicating a favorable vibration control performance, but the increase of damping ratios of torsional modes is trivial. Time-domain buffeting analysis ascertains that the root mean square （RMS） value of along-wind acceleration at tower top is reduced significantly. The suggestion for selecting appropriate damping materials as well as treatment location is also provided.