Title of article
Estimationofcollapsemomentforthewall-thinnedpipebendsusingfuzzymodelidentificationOriginalResearchArticle
Author/Authors
ManGyunNa، نويسنده , , JinWeonKim، نويسنده , , InJoonHwang، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
9
From page
1335
To page
1343
Abstract
Inthiswork,thecollapsemomentduetowall-thinneddefectsisestimatedthroughfuzzymodelidentification.Asubtractiveclusteringmethodisusedasthebasisofafastandrobustalgorithmforidentifyingthefuzzymodel.Thefuzzymodelisoptimizedbyageneticalgorithmcombinedwithaleastsquaresmethod.Thedevelopedfuzzymodelhasbeenappliedtothenumericaldataobtainedfromthefiniteelementanalysis.Principalcomponentanalysisisusedtopreprocesstheinputsignalsintothefuzzymodeltoreducethesensitivitytotheinputchangeandthefuzzymodelaretrainedbyusingthedatasetpreparedfortraining(trainingdata)andverifiedbyusinganotherdatasetdifferent(independent)fromthetrainingdata.Also,threefuzzymodelsaretrained,respectively,forthreedatasetsdividedintothethreeclassesofextrados,intrados,andcrowndefects,whichisbecausetheyhavedifferentcharacteristics.Therelativerootmeansquare(RMS)errorsoftheestimatedcollapsemomentare0.5397%forthetrainingdataand0.8673%forthetestdata.Itisknownfromthisresultthatthefuzzymodelsaresufficientlyaccuratetobeusedintheintegrityevaluationofwall-thinnedpipebendsandelbows.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2006
Journal title
Nuclear Engineering and Design Eslah
Record number
896084
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