earticle

영어

Free-vibration response of structures includes informations their inherent dynamic characteristics such as natural frequency and damping ratio. Especially, viscous and friction damping cause free-vibation response of structures to logarithmic and linear decrement, respectively. This paper proposes simultaneous estimation of viscous damping ratio and friction coefficient by using free-vibration response that inherently includes dynamic characteristics of structures. The viscous damping ratio and friction coefficient are estimated from the successive two peaks in both displacement and acceleration free-vibration response of single-degree-of-freedom(SDOF) system with both damping. The proposed method of simultaneous estimating of viscous damping ratio and friction coefficient using free-vibration response of structures was verified by numerical simulation of an assumed SDOF system.