学科分类
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1 个结果
  • 简介:BeamresponsesunderanimpactNDTloadarestudiedusingtheFourierandLaplacetransforms.Numericalcomputationisperformedforaparametricstudyofbeamandloadparameters.Itisshownthatunderanimpactload,thetimedurationfordisplacementtovanishistentimeslongerthanthatforvelocityandacceleration.Themaximumresponseisachievedfirstinacceleration,followedbyvelocity,andfinallydisplacement,allofwhichoccurbeforetheimpactloadisremoved.Atthemomentthattheimpactloadisremovedfromthebeam,thereisadiscontinuityinthevelocityandaccelerationresponses,butnotindisplacementresponse.TheeffectofKandphonbeamresponseismuchlesssignificantthanthatofEIandC,whichhavesimilareffectonbeamresponse.AsEIincreases,peakvaluesofdisplacement,velocityandaccelerationresponsedecrease.TheeffectofKonbeamresponseonlybecomesappreciableaftertheimpactloadisremoved.WhilethepeakofdisplacementremainalmostunchangedasKincreases,thedisplacementresponsedecaystozerofasterforlargeKvaluesthanforsmallKvalues.

  • 标签: 无损探伤 抗震 工程振动 结构动力学