Spectral Analysis Method for the Linear Discrete Dynamic Systems with Non-Proportional Damping

2005 ◽  
Author(s):  
Jooyong Cho ◽  
Usik Lee
Keyword(s):  
Spectral Analysis ◽  
Dynamic Systems ◽  
Analysis Method ◽  
Discrete Dynamic ◽  
Spectral Analysis Method ◽  
Discrete Dynamic Systems

scholarly journals An FFT-Based Spectral Analysis Method for Linear Discrete Dynamic Systems with Non-Proportional Damping

2006 ◽  
Vol 13 (6) ◽  
pp. 595-606 ◽  
Author(s):  
Jooyong Cho ◽  
Usik Lee
Keyword(s):  
Spectral Analysis ◽  
Dynamic Systems ◽  
Forced Vibration ◽  
Fourier Transforms ◽  
Initial Conditions ◽  
Analysis Method ◽  
Discrete Dynamic ◽  
Vibration Responses ◽  
Spectral Analysis Method ◽  
Discrete Dynamic Systems

This paper proposes a fast Fourier transforms (FFT)-based spectral analysis method for the dynamic analysis of linear discrete dynamic systems which have non-proportional viscous damping and are subjected to non-zero initial conditions. To evaluate the proposed FFT-based spectral analysis method, the forced vibration of a three degree-of-freedom (DOF) system is considered as an illustrative problem. The accuracy of the proposed FFT-based spectral analysis method is evaluated by comparing the forced vibration responses obtained by the present FFT-based spectral analysis method with those obtained by using the well-known Runge-Kutta method and modal analysis method.

Sign in / Sign up

Export Citation Format

Share Document