为研究粘滞阻尼器对大跨空间桁架结构减震控制作用,在某体育馆屋盖不同部位设置粘滞阻尼器,输入三向地震波进行时程分析。以屋盖结构水平向位移、加速度及构件内力为减震控制目标,计算分析表明,设置粘滞阻尼器能有效抑制结构在地震作用下响应;屋盖结构均匀布置阻尼器较集中布置减震效果好;结构减震效果不随阻尼系数的增大而线性提高,且存在较优值范围;不同地震烈度下粘滞阻尼器对空间桁架结构减震控制均有明显效果;粘滞阻尼器在不同地震波输入时滞回曲线均较饱满,呈现典型速度相关型阻尼器特征。研究结果对粘滞阻尼器用于大跨空间结构减震控制具有一定参考价值。

The seismic damage control was investigated for large-span space truss structures by placing viscous dampers at different locations on roof.Time history analyses were performed with three-dimensional earthquake ground motion inputs for a gymnasium building.Taking the displacement and acceleration in the horizontal direction as well as the member forces in the roof structure as the targets of vibration control,the analytical results indicate that the seismic responses can be effectively controlled via installing dampers on the space truss structure.Uniform placement of viscous dampers shows better performance when comparing with that of centralized placement.The efficiency of the seismic response reduction is not linearly increasing with the damping coefficient enhancement,while there is an optimal value existing.The viscous dampers have obvious effects on the vibration control of space truss structure under different earthquake intensity.The energy dissipation hysteresis curves of visc

本文对近几十年来基于阻尼耗能技术的振动控制技术，诸如粘滞阻尼器、金属阻尼器和颗粒阻尼技术等进行了回顾与总结。

This paper carries on the review and summary on vibration control technologies based on the damping energy di-ssipation technology in recent decades, such as viscous damp-ers, metal damper and particle damping technology.

斜拉索粘滞阻尼器能抑制斜拉索振动,可作为斜拉索永久抑振措施。结合粘滞阻尼器理论原理,针对嘉绍大桥主航道桥斜拉索设计了阻尼器性能参数,并开发了阻尼器产品。对阻尼器进行性能试验及现场减振效果测试,结果表明:阻尼器性能稳定,各项性能指标均满足设计要求;实测对数衰减率达到6%以上,与理论值变化规律基本一致,具有良好的减振效果。

Viscous dampers was able to curb the vibration of stay cables ,which can be taken as the permanent vibration control measure for stay cables .Combined with the theories of the viscous dampers ,the performance parameters of the dampers for stay cables of the main naviga-tional channel bridge of Jiashao Bridge were designed and the viscous dampers were developed . The dampers were checked by the performance testing and field vibration efficiency testing .The results of the testings demonstrated that the dampers showed stable performance ,all the per-formance indexes could meet the design requirements .The measured logarithmic decrement was above 6% ,basically in compliance with the changing rule of the theoretical values ,proving that the dampers have sound vibration damping effect .

针对地震时周期比超限偏心结构的扭转破坏具有突发性的问题，为了研究粘滞阻尼器和普通工字型钢支撑对周期比超限偏心结构扭转耦联振动的控制效果，通过理论分析和有限元数值计算，对比分析了粘滞阻尼器及普通工字型钢支撑共同控制地震作用下不规则建筑结构的自振特性、层间位移、层间位移角、层间扭转角及其内力变化等动力响应。结果表明：设置粘滞阻尼器控制结构，层间位移角最大降低21％，顶层位移峰值最大降低32％，加速度峰值最大降低28％，扭转角最大降低31％；设置粘滞阻尼器与普通钢支撑联合控制后，层间位移角最大降低26％，顶层位移峰值最大降低41％，加速度峰值最大降低38％，扭转角最大降低45％，说明粘滞阻尼器与普通钢支撑结合对偏心结构的控制效果好于粘滞阻尼器控制结构。

Aiming at the paroxysmal destruction of eccentric structures caused by torsion under the action of earthquake , in order to analyze the vibration control effect of viscous damper and steel sup-port on the lateral-torsion response of eccentric structures , based on theoretical analysis and numeri-cal calculation , the free vibration characteristics , interlayer displacement , interlayer displacement angle , interlayer torsion angle and internal force change of the irregular structures were comparative-ly analyzed .The results indicated that the control structure with viscous dampers reduced the maxi -mum value of some parameters of which the interlayer displacement angle was reduced by 21%, the topmost story displacement was reduced by 32%, the interlayer acceleration was reduced by 28%, and the interlayer torsion angle was reduced by 31%.Combined with the ordinary steel support , the interlayer displacement angle was reduced by 26%, the topmost story displacement was reduced by 41%, th

为提高系统隔振性能,研究摩擦阻尼在几何非线性条件下产生的迟滞阻尼(结构阻尼)对力传递特性影响。区别于传统单自由度隔振系统,采用含基础质量影响的两自由度无约束隔振系统模型进行阻尼力特性研究。用平均法求解运动方程,获得系统频率-响应幅值方程,以此导出系统力传递率及力位移传递率表达式。理论结果表明,质量、阻尼与激励频率为影响传递率主要因素。与粘滞阻尼相比,迟滞阻尼隔振效果更好,不仅能降低共振区响应,亦能改善高频区隔振性能。对运动方程进行扫频激励下数值仿真,获得力传递特性数值解。结果显示仿真结果与理论结果吻合良好,几何非线性阻尼隔振系统具有良好隔振性能。

To improve performances of a vibration isolation system,the influence of hysteretic damping caused by friction damping under nonlinear geometric condition on the force transmissibility of the system was investigated.Being different from the traditional single DOF vibration isolation model,an unconstrained 2-DOF vibration isolation model was built,containing the influence of the base mass.Its motion equation was solved by using the averaging method to get the frequency-amplitude equation. Then the expressions of the force transmissibility and the force-displacement transmissibility of the system were derived.It was shown that mass,damping and excitation frequency are the dominant parameters to influence the transmissibility;comparing to linear viscous damping,the hysteretic damping has a better performance to isolate vibration,it not only suppresses the resonance responses,but also improves the isolation performances at high frequencies.At last,a numerical solution of the force transmis