简介：Characteristicperiodisanimportantparameteroftheseismicdesignresponsespectrum.Thereisimportanttheoreticalsignificanceandengineeringapplicationvaluetothestudyofthecharacteristicperiodofseismicdesignresponsespectrumofultrahighvoltage(UHV)electricalequipment.Inthispaper,1448horizontalearthquakerecordswithintheworldscopeincludingtheUnitedStatesandJapanforSiteClassⅢwereanalyzed.Resultsshowthatbothmagnitudeandepicentraldistancehavegreatinfluenceonthecharacteristicperiod.About80%ofcharacteristicperiodsofstrongearthquakerecordsareabout0.9s.Statisticalanalysiswasconductedontheseismichazardassessmentresultsof312projectsofChinainrecentyears,anditisfoundthatabout70%ofcharacteristicperiodsareabout0.9s.Combinedwiththerelatedcodecomparisonandanalysis,itissuggestedthatthecharacteristicperiodoftheseismicdesignresponsespectrumofUHVelectricalequipmentshouldselect0.9sinordertoeffectivelyguaranteetheseismicsafetyofUHVelectricalequipment.
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