錨桿錨固質量無損檢測理論與智能診斷技術研究.pdf

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