Identification of Nonlinear Structural Dynamic Systems Using Wavelets
Identification of Nonlinear Structural Dynamic Systems Using Wavelets
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DOI：
10.1061/(asce)0733-9399(1998)124:10(1059
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发表时间：
1998-10
期刊：
影响因子：
--
通讯作者：
Y. Kitada
中科院分区：
文献类型：
--
作者：
Y. Kitada
本文讨论了小波在非线性结构动力系统辨识中的应用。该方法可以精确地确定结构系统的滞回曲线和阻尼系数，而不需要对系统的非线性特性进行先验假设，从而使我们能够清楚地了解非线性行为中发生的复杂现象。将结构系统的切线刚度表示为小波级数展开。利用最小二乘法对序列的系数进行估计。将该识别方法应用于地震作用下的数值计算和试验结果，验证了该方法的有效性和适用性。
This paper addresses the use of wavelets in the identification of nonlinear structural dynamic systems. The proposed method accurately determines hysteresis curves and damping coefficients of the structural system without the need for prior assumptions about the nonlinear characteristics of the system, thereby enabling us to clarify complex phenomena occurring in nonlinear behavior. The tangent stiffness of the structural system is expressed as a series expansion of wavelets. The coefficients of the series are estimated by means of the least-squares method. This identification method has been applied to numerical and experimental results under earthquake motion, demonstrating its effectiveness and applicability.