桁架結構損傷識別方法研究

1、蘭州理工大學碩士學位論文桁架結構損傷識別方法研究姓名：邵云飛申請學位級別：碩士專業(yè)：結構工程指導教師：杜永峰李慧20070522碩士學位論文AbstractCivilengineeringstructuresinevitablyariseinjuryinthelongrunprocess，InordertoeiLsurethestructuralsafetyanddurabilityJudgmentofthestatehavebecom

2、ethefocusoftheresearchintheacademicandengineeringworldathomeandabroadthroughcertainmealiSandmethodsofdetectionofstructuraldamageThedynamiccharacteristicsofstructuresareindosedrelationshipwiththestructuralparameters，andst

3、ructuraldamagewillcausethedynamiccharacteristicsshiftscOrrespondennyBasedonthevibrationdamageidentificationmethodisbasedonthestructuraldynamictest，Throughthedynamictestmeasureddataanalysis，theemergenceofinjurylocationand

4、extentCanbejudgedInthispaperwiththespecificobjectofresearch(trussstructure)，thedamagesensitivedynamicparametersofthestructuraldiagnosishavebeenstudieddetailedlyn地maincontentsinclude：Describingthestatusofresearchathomeand

5、abroad，thispaperdiscussesandstudiesthediagnosisofstructuraldamagetheoriesandmethodsbasedonmodalparametersAPDLprogrammingofANSYSdevelopmentlanguageisdesigned，themodalautomaticsolutionprocessofstructureinthedifferentinjury

6、conditionshavebeenrealized，anddefinemulti—dimensionalarrayparametersofAPDL，completecalculatedmodalparametersstorageinthedifferentinjuryconditions，ultimatelyextractthemodalinformationintothedatafileoftheresultConcretelydi

7、scussthetechnologyofdamageidentificationbasedonthefrequency、vibrationmode、stiffness、flexibilityusingtheexampleofthepracticaltrussmodel，thispapercomparesdamageidentificationresultsofthenormalizedrateoffrequenc、modalcurvat

8、ure，flexibilitycurvatureAccordingtothestraincharacteristicsofpoleelementofthetrl塔sstructure，thispaperproposetheinjuryindicatorthatisrationofthechangesofstrainmodalandvalidatethattherationofthechangesofstrainmodaloftheonl

9、yfirstmodeCanaccuratelyidentifiythestructuraldamagethroughthenumeticalsimulation；furtheranalyzetheinfluenceofdifferentdegreedamagetotherationofthechangesofstrainmodalandcomparewithsensitivityofrationofthechangesofstrainm