1、武漢理工大學(xué)碩士學(xué)位論文基于小波分析的橋梁結(jié)構(gòu)損傷識(shí)別方法研究姓名：蔡正東申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：道路與鐵道工程指導(dǎo)教師：張謝東20071101武漢理工大學(xué)碩士學(xué)位論文AbstractInviewofprobablepartialdamageofbridge翻瞳ua【u陀sinoperationduetooutsidecomplexfavorsthesuddenvariationinformationisdetectedusingsel

2、fadaptivenessoftimefrequencywindowinwaveletanalysistoidentifydamageinstructuresForthesimplebeam，continuousbeamandcantileverbeam，thedamageanditsidentificationaresimulatednumericallythedamagealarming，positioningandquantify

3、ingarestudiedforwaveletstransformbaseddamageidentificationThemainsubjectsaresummarizedasfollows：(1)ThedamagealarminginstructureisstudiedforwaveletpacketnodalenergyFirst，thethesisanalyzesthelinksbetweennodalenergyinformat

4、ionandstructuraldamage，andthenproposestherelativevalueofwaveletpacketnodalenergyasindicatorsofdamagealarmingThecontinuousbeamissimulatednumericallywiththehelpofANSYS，andthechangeofmodalfrequenciesbefweendamagedandundamag

5、edstructureisobtained；Meanwhile，theaccelerationofANSYStransientanalysisisstudiedinwaveletpacketanalysisinMATLAB，andthechangeoftherelativevalueofenergyisobtainedComparingthetwo，thechangeofenergyismoresensitivetothedamage，

6、anditneedsnomoreinformationofStlllgtuteparameters，SOtheonlinedamagealarmingCanbebeRerachieved(2)Thethesisstudiesthemethodsofdamagepositioningbasedoncurvaturemodeandwavelettransfo肋Firstthemethodsofdamageidentificationbase

7、doncurvaturemodeandwavelettransformareanalyzedrespectivelyThecantileverbeamissimulatednumericallyandtheculweofcurvaturemodeisobtained，thenweCanfindthedamagepointeasily；themodaldisplacementofthesimplebeamisstudiedbywavele

8、t『lxansforill，andthecoefficientcHiNeisobtained，thenwecanfindthedifferentpointofdamagesignalclearlyThesingularityofthesi掣】面callbefoundincurvatureeasilyandidentificatedinwaveletanalysisclearlysowecangetbettereffectforthere