基于模態(tài)參數(shù)分析的井架結(jié)構(gòu)損傷識(shí)別研究.pdf

1、大慶石油學(xué)院碩士學(xué)位論文基于模態(tài)參數(shù)分析的井架結(jié)構(gòu)損傷識(shí)別研究姓名：遲利源申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：安全技術(shù)及工程指導(dǎo)教師：鄒龍慶20060315壘!!苧=!：墾壘竺!DamageDetectioninDerrickStructurebyModalParameterAnalysisAbstractModernprojectstructuresareproceedingatthedirectionofmaximizationcomplica

2、tionandautomationThecomplicatedenvironmentsofservicethreatfunctionalsafetyofthestructureMoreoverintherealliremanydisastersstructuralengineeringaccidentoccurrenceinitiatesthepeoplethe”health”questionwidelypaysattentiontot

3、hestructureToguaranteethesafetyandavoiddisasterthescholars，engineersandtechniciansarepayingattentiontotheresearchofjdentificationforthedamageofstructurerealtimelyon1ineandaccuratelyThisarticleelaboratesthetechnologyofstr

4、ucturaldamageidentificationdomesticandforeignresearchpresentsituation，IntroducedeachkindoftheoryandtheresearchtechniqueforstructuraldamageidentificationAndthemodeparameteranalysiscarriesonthestructuraldamageidentiflcatio

5、ntothepetroleumderrickstructureforthetechniealresearchandtheappliedresearch；Basedonthemodalparameters，itdiscussesmostlythetheoryandtechniqueofthedamageidentificationforstructurewiththeflexibilitydifierencemethodandcurvat

6、uremodalmethodthenpresenttheideaofdamageidentificationforstructurewithflexibilitydi仃erencecurvaturemethodTheapplicationofthethreedamageidentificationtechniquesaboveforthederrickofdrillingrig，confirmthatvagueorwronglocati

7、onwilloccurinthedamageloeationmethodbasedonflexibilitydifference，andthecurvaturemodalmethodneednotrelyonthestructuralparameterbeforethedamage，buthasthehiddentroubleofvagueloeationforsmalldamageItstudiesandputsforwardthef

8、lexibilitydifiereneecurvaturemethod，andmanysimulateddamageexamplesshowthatthemethodhasnotableadvantagessuchashighdamageidentificationsensitivitystrongreliabilityandvisualizationandsimplicityinamountandgraphanalysisTheuse

9、ofCentralinsertlawformodalparameterinthecurvaturemodalandflexibilitydifferencecurvaturemethodcansolvethecontradictionbetweendecreasingmeasurepointsandtheguaranteeofidentificationprecision；DevelopedtheoperationusingMatlab

10、sottwareandtheExceltoolandcollectsthechartprocedure，aslongaslowerstepvibrationshapeandfrequencyrateofthestructureareinput，thevalueandthegraphicrepresentationofdamageidentifieationwillbeobtainedKeywords：modalParameter；dam