錨桿錨固質(zhì)量無損檢測理論與智能診斷技術(shù)研究.pdf

1、YIUllll!15llllh3ll117lll17llll5“l(fā)l⑨天畢大謄中目近代第所大學(xué)錨桿錨固質(zhì)量無損檢測理論與智能診斷技術(shù)研究博士學(xué)位論文■_j—●●J■一B習(xí)爿：Ir內(nèi)●I●】___一級學(xué)科：水利工程學(xué)科專業(yè)：水利水電工程作者姓名：李張明指導(dǎo)教師：練繼建教授天津大學(xué)研究生院2007年12月AbstractAstudyonnondestructivedetectiontheoryandintelligentdiagnosist

2、echnologyofrockboltanchoragequalityhasbeencarriedoutsystematicallyinthispaperThemathematicsmodelofthetransientrespondsofrockboltandwallrocksystemhavebeenstudiedanditsnumericalvaluesolutionofwaveequationhavebeenanalyzedOn

3、thebasisofstudyontheprincipleandtechnologyofthesonicreflectiondetectionmethodanddetectionpracticing，akindofspecialsensorforrockboltdetectionhasbeendeveloped，Combiningwithmodelrockbolttestingandactualprojectdetectionpract

4、iceinsite，anevaluationstandardforrockboltanchoragequalityofnondestructivedetectionhasbeenputforwardThereflectedwavecontainingtheinformationofrockboltdefectwasobtainedonthedissertationfirstlybymeansofsonicreflection，decom

5、posingofthewaveletpacketforthereflectedwaveandcalculationofthedecomposedwaveformfractaldimensionwerethenconducted，thecharacteristicvectorsindicatingrockboltqualitywereaccordinglyachieved；basedontheoverallanalysisofthefac

6、torswhichinfluencetherockboltqualitydiagnosis，intelligentdiagnosismodelofrockboltqualityhasbeenputforwardbasedontheBPneuralnetwork，whichhascreatedacompletesetofpracticable，shortcutandconvenientdetectionmethodandtechnolog

7、yfortheanchoragesystem，andhassignificantapplicationvalueonthequalitydetectionfortherockboltworksThemainachievementsofstudyworksandsomeinnovationsareasfollows1Themathematicsmodelofthewaveequationoftransientrespondsofrockb

8、oltandwallrocksystemhavebeenstudiedanditsnumericalvaluesolutionofwaveequationhavebeenanalyzed2Theprincipleofthesonicreflectionofrockboltdetection；reflectionanalyseintimeandfrequencyfieldandthemethodofsignalfittinghavestu