Dynamic Amplification of Electrical Cabinets.

摘要

Dynamic amplification of electrical cabinets is discussed in the report. The amplification factor is defined as the ratio of the output and the input spectral accelerations of the time histories recorded at a device location and at the base of the cabinet, respectively. High level test data of nine motor control centers and ten switchgear assemblies have been studied. The amplification values at various frequencies are graphically presented as amplification spectra. A probabilistic estimate of the amplification factor for each equipment class is included. The influence of various parameters on the amplification values is also discussed.