A comparative study of seismic testing methods

This study presents statistical analyses of the response of models of electrical power equipment to a variety of base inputs including historical earthquakes, computer-generated artificial earthquakes, and sine beats and steady state sines. The data presented provides model response comparisons, between 1) historical earthquake ensembles and artificial earthquakes; 2) earthquake-like base motion and the currently used sine beat and steady-state sine base motions. Finally, from the comparisons, the applicability of sine beat and steady-state sine inputs to multiple-degree-of-freedom systems is presented and the limitations discussed.