摘要
BeamresponsesunderanimpactNDTloadarestudiedusingtheFourierandLaplacetransforms.Numericalcomputationisperformedforaparametricstudyofbeamandloadparameters.Itisshownthatunderanimpactload,thetimedurationfordisplacementtovanishistentimeslongerthanthatforvelocityandacceleration.Themaximumresponseisachievedfirstinacceleration,followedbyvelocity,andfinallydisplacement,allofwhichoccurbeforetheimpactloadisremoved.Atthemomentthattheimpactloadisremovedfromthebeam,thereisadiscontinuityinthevelocityandaccelerationresponses,butnotindisplacementresponse.TheeffectofKandphonbeamresponseismuchlesssignificantthanthatofEIandC,whichhavesimilareffectonbeamresponse.AsEIincreases,peakvaluesofdisplacement,velocityandaccelerationresponsedecrease.TheeffectofKonbeamresponseonlybecomesappreciableaftertheimpactloadisremoved.WhilethepeakofdisplacementremainalmostunchangedasKincreases,thedisplacementresponsedecaystozerofasterforlargeKvaluesthanforsmallKvalues.
出版日期
2005年02月12日(中国期刊网平台首次上网日期,不代表论文的发表时间)