采用半主动TMD的建筑结构振动控制研究

为了改善在建筑结构中采用调频质量阻尼器（简称TMD）进行抗震时抗震效果不稳定和抑制频带窄等缺点，研究了变阻尼半主动调频质量阻尼器（简称STMD）。为了使阻尼变化容易实现，在设计激励力时采用了阶跃函数方式；同时还考虑到变动阻尼应在一定范围内进行的特点，提出了含约束的结构振动半主动控制方案；在控制策略方面，考虑到地震的随机性，引入了广义预测控制方法。从实例分析可知，采用STMD可以使设计质量、刚度和阻尼值分别下降约30％，90％，90％。计算仿真结果表明，采用STMD的抗震效果比TMD要好得多。

Research on Semi-Active TMD of Building Structure Vibration Control

In order to improve the unsteady anti-seismic effect and narrow frequency suppression band of using TMD(tuned mass damper), an semi-active tuned mass dampers(STMD) with a controllable damper is studied. Firstly, the step function is adopted as actuating force function for acquiring a convenient damper change. Secondly, the semi-active vibration control plan with constraints is presented as the work range of controllable damper is considered. Thirdly, the generalized predictive control plan is utilized to fit for earthquake's randomicity. The numerical examples show that using STMD can reduce the design values of mass, stiffness and damper to about 30%, 90% and 90%. Respectively, and the anti-seismic effect of using STMD is better than that of using TMD.