비비례 진동감쇠를 갖는 선형 동역학계의 스펙트럴 해석법

Spectral Analysis Method for the Multi-DOFs Dynamic Systems with Non-Proportional Damping

This paper introduces a fast Fourier transform (FFT)-based spectral analysis method for the transient responses as well as the steady-state responses of linear dynamic systems with non-proportional damping. The force vibration of a non-proportionally damped three-DOF system is considered as the illustrative numerical example. The proposed spectral analysis method is evaluated by comparing with the numerical solution obtained by the Runge-Kutta method