Study on Dynamic Character of Electrical Switch Cabinet in Seismic Test

Electrical switch cabinets are widely used in power control systems. In order to ensure the seismic performance of electrical switch cabinets, seismic test must be taken. Through check calculation, the acceleration response of the measurement point can be used to check the response of strain measurement points, and the result shows that the check value is consistent with the actual measurement result. Analysis and contrastive studies are made on the natural vibration characteristics of the structure with white-noise wave transfer function, seismic wave transfer function and white-noise wave auto-power spectrum function. Legitimacy assessments are made on mechanical structure and filed installation of electrical switch cabinets by analyzing structure transfer function curves and cross-correlation function curves. It also provides basis for evaluate the seismic performance of electrical switch cabinets and installation brackets.