新型非线性电涡流TMD设计与研究

DESIGN AND RESEARCH OF A NEW NONLINEAR EDDY CURRENT TMD

利用结构动力学的基本原理,建立多自由度的振动模型,并借助MATLAB程序进行编程计算,通过数据分析,对适用于该结构的调谐质量阻尼器(TMD)进行设计,以在磁场中产生的电涡流为阻尼器的非线性阻尼;并通过以某美术馆的钢结构连桥为设计实例,发现了其非线性TMD带宽大于线性TMD带宽,同时与现有的主要减振方式进行对比,证明了此新型非线性电涡流TMD对于大跨度结构在减振效率和实用等方面的优越性。

Employed the basic principle of structural dynamics, the essay established a vibration model of multi degree of freedom. And through the data analysis by means of MATLAB program to calculate, TMD was designed which was applied to the structure to produce nonlinear damp which use eddy current as damper. And taking the steel structure connecting bridge in the Art Gallery of Datong Yudong Culture Area for instance, we found that the nonlinear TMD bandwidth was greater than the linear one. Meanwhile, comparing with the primary existing way of vibration attenuation, the advantages of the new nonlinear eddy current TMD in efficiency of vibration attenuation and practicality for span structures was proved.