실험모드분석에 의한 3층프레임 시편의 지진응답 예측

The dynamic responses of electrical equipment may not be easily analyzed since it is difficult to construct the analytical models due to their complex mass and stiffness distributions. This study presents an approach to estimate the seismic responses of a structure by combination of test and analysis, which may be applicable to the electrical cabinet in field. This technique firstly constructs the modal equations of the structure by using the experiment modal parameters obtained from the impact test. Then the seismic responses of the structure may be calculated by mode superposition method. The applicability of the proposed approach were validated through the numerical simulation experiment.