Describing Functions For Effective Stiffness and Effective Damping of Hystersis Structures

作     者：Chung, Steven Chingyei Huang, Jen-So Pong, Wenshen 

作者机构：Dept. of Automatic Control Engineering Feng-Chia University Taichung Taiwan School of Engineering San Francisco State University 1600 Holloway Avenue San FranciscoCA94132 United States 

出 版 物：《Electronic Journal of Structural Engineering》 (Electron. J. Struct. Eng.)

年 卷 期：2004年第4卷

页      面：55-65页

核心收录：

学科分类：0711[理学-系统科学] 08[工学] 0807[工学-动力工程及工程热物理] 081402[工学-结构工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0814[工学-土木工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Hysteresis 

摘      要：For a hysteresis structure with energy dissipation devices, the force-displacement relation is nonlinear such that it is very difficult to evaluate the actual damping and stiffness coefficients, even if the force-displacement characteristic is simply perfect elasto-plastic. With the describing function method, we can linearize the nonlinear behavior of the energy dissipation devices and then obtain the equivalent damping and stiffness coefficients;In turn, the effective period and equivalent damping ratio can be attained. It is stressed that with this approach, the imaginary part of the describing function is just the energy dissipation term, which corresponds to the conventional hystersis damping derived by the energy method. Simulation results confirm the effectiveness of this proposed method. © 2004 EJSE International. All rights reserved.