Optimum Parameter of a Viscous Damper for Seismic and Wind Vibration

Authors: Soltani Amir, Hu Jiaxin

Abstract:

Determination of optimal parameters of a passive  control system device is the primary objective of this study.  Expanding upon the use of control devices in wind and earthquake  hazard reduction has led to development of various control systems.  The advantage of non-linearity characteristics in a passive control  device and the optimal control method using LQR algorithm are  explained in this study. Finally, this paper introduces a simple  approach to determine optimum parameters of a nonlinear viscous  damper for vibration control of structures. A MATLAB program is  used to produce the dynamic motion of the structure considering the  stiffness matrix of the SDOF frame and the non-linear damping  effect. This study concluded that the proposed system (variable  damping system) has better performance in system response control  than a linear damping system. Also, according to the energy  dissipation graph, the total energy loss is greater in non-linear  damping system than other systems.

 

Keywords: Passive Control System, Damping Devices, Viscous Dampers, Control Algorithm.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1090956

References:

[1] Franklin, Y. C, Hongping, J, Kangyu, L, "Smart Structures”; Taylor & Francis Group, LLC, NW, 2008.
[2] Gluck, J. and Reinhorn, A.M, "Active Viscous Damping System for Control of MDOF Structures";
[3] MATLAB (1993) - High Performance Numeric Computation and Visualization Software. User’s guide. The math works Inc.
[4] Meirovitch, L., "Dynamics and Control of Structures”; John Wiley & Sons, New York, NY, 1990.
[5] Patel, C. C., Jangid, R. S.; "Optimum Parameter of Viscous Damper for Damped Adjacent Coupled System”; Journal of Civil Engineering and Science, Vol. 1 No. 1, 2012.
[6] Soong, T. T, Dargush, G. F, "Passive Energy Dissipation Systems in Structural Engineering”; John Wiley & Sons, New York, NY, 1997.
[7] Terenzi, G., "Dynamics of SDOF System with Non-Linear Viscous Damping”; ASCE Journal of Engineering Mechanics; 125(8):956-963, 1999.