摘要
本文提出一个通过稳态正弦激励直接识别钢丝绳减振器滞回性能的方法。实验结果表明,在激振频率由0～30Hz范围内,滞回性能基本上与频率无关。基于这一结论,通过对实验数据曲线的拟合,得到了一个描述力-位移滞回曲线的简洁多项式数学模型,这个模型在用于分析非线性滞回系统时是很方便的。本文还提出了另一个简单的识别方法。当对减振器进行稳态简谐激励时,对响应讯号进行F.F.T分析,便可识别其模型。实验结果表明,这个方法既有足够的精度,又远较其它识别方法简单和有效。
A direct identification method is presented to identify the hysteretic behavior of wire-cable isolators through steady harmonic excitation. Experimental results show that the frequency of excitation over the range from 0 -30 Hz has almost no influence on the hysteretic behaviors. Based on this conclusion,a compact polynomial mathematic model for representing the hysteretic force-deflection curves is presented through the curve fitting of experimental data. This mathematic model is convenient to be used in dynamic analysis of nonliear hysteretic systems. An alternative but simplified identification method is presented by using F. F. T. analysis of response signal, when the isolator is excited by a steady harmonic excitation. Experimental results show that this method is accurate enough and is more simple and efficient than other identification methods.
出处
《地震工程与工程振动》
CSCD
北大核心
1991年第3期76-86,共11页
Earthquake Engineering and Engineering Dynamics
基金
香港政府U.P.G.C.基金
我国国家自然科学基金
