摘要
Accurateestimationofstiffnesslossisachallengingprobleminstructuralhealthmonitoring.Inthisstudyorthogonalwaveletdecompositionisusedforidentifyingthestiffnesslossinasingledegreeoffreedomspring-mass-dampersystem.Theeffectsofexcitationfrequencyonaccuracyofdamagedetectionisinvestigated.Resultsshowthatpseudo-aliaseffectscausedbytheorthogonalwaveletdecomposition(OWD),affectdamagedetectability.Itisdemonstratedthattheproposedapproachissuitablefordamagedetectionwhentheexcitationfrequencyisrelativelylow.Thisstudyshowshowaprioriknowledgeaboutthesignalandabilitytocontrolthesamplingfrequencycanenhancedamagedetectability.
出版日期
2004年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
