基础激励下双层无穷橡胶调谐质量阻尼器性能和参数研究  

PERFORMANCE AND PARAMETERS OF A DUAL-LAYER INFINITE-MULTIPLE RUBBER TMD FOR STRUCTURES UNDER BASE EXCITATION

作　　者：杜冬[1] 刘利军[1] 华宏星[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《振动与冲击》2008年第4期35-39,共5页Journal of Vibration and Shock

摘　　要：提出了一种研究基础激励下橡胶阻尼DMTMD(Dual-1ayer Multipe Tuned Mass Dampers)[1,2]参数和性能的新方法,即双层无穷调谐质量阻尼器(the Dual-layer lnfinite Multiple Tuned Mass Dampers,i.e.DIMTMD)方法。首先,通过求取DMTMD在并联TMD个数趋于无穷多时的极限得到DIMTMD传递函数。然后,针对基础激励下滞回阻尼结构的振动控制,对DIMTMD传递函数用H∞方法进行了优化,并与含有不等数目TMD的DMTMD进行了比较。结论显示,DIMTMD可以用于求解DMTMD包含的并联TMD个数较多时的极限(或最好)性能和参数,避免丁过去只能通过大量的数据观测来猜测的做法。而且,DIMTMD具有更快的迭代速度,采用DIMTMD寻找最优参数时间短,而且所得结果完全适用于并联TMD多于10个的DMTMD。A new design method for a rubber dual-layer Infinite-Multiple TMD(DIMTMD) is proposed based on classical hysteretic DMTMD(Dual-layer Multiple Tuned Mass Damper) under ground excitation.Firstly,the transfer function of a DIMTMD is obtained by letting the number of TMDs in parallel of a DIMTMD approach infinite.Secondly,under ground acceleration excitation a hysteretically damped main structure equipped with DIMTMD as well as DIMTMD are investigated.Using DIMTMD,the best and critical performance of a DIMTMD composed of many TMDs in parallel can be obtained together with optimal design parameters only conjectured based on a lot of date observation in previous studies.It is especially important that the DIMTMD method has excellent iteration speed,and it can give correct optimal parameters numerically for DMTMD with more than 10 TMDs in its top layer.

关 键 词：基础激励 优化参数 双层多重凋谐质量阻尼器 滞回阻尼 

分 类 号：TU311[建筑科学—结构工程]