accuracy requirements for shipboard impressed current cathodic protection system modeling.docx

accuracy requirements for shipboard impressed current cathodic protection system modeling.docx

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accuracyrequirementsforshipboardimpressedcurrentcathodicprotectionsystemmodeling

Buildingcoastaldefencesresultsinthelossandfragmentationofsedimentaryhabitatsandtheirreplacementbyartificialrockyhabitatsthatbecomecolonisedbyalgaeandmarineanimals.Theengineeringdesignandconstructionofthesestructureshavereceivedconsiderableattention.However,theecologicalconsequencesofcoastaldefenceshavebeenlessextensivelyinvestigated.Furthermore,duetotheirrapidproliferation,thereisagrowingneedtounderstandtheroleoftheseman-madehabitatsinthecoastalecosystemsinordertoimplementimpactminimisationand/ormitigationmeasures.

AspartoftheDELOSproject,targetedstudieswerecarriedoutthroughoutEuropetoassesstheecologicalsimilarityoflow-crestedcoastaldefencestructures（LCS）tonaturalrockyshoresandtoinvestigatetheinfluenceofLCSdesignfeaturesonthecolonisingmarineepibiota.LCSscanbeconsideredasarelativelypoorsurrogateofnaturalrockyshores.Epibioticcommunitieswerequalitativelysimilartothoseonnaturalrockyshoresasbothhabitatsareregulatedbythesamephysicalandbiologicalfactors.However,therewerequantitativedifferencesinthediversityandabundanceofepibiotaonartificialstructures.Typically,epibioticassemblageswerelessdiversethanrockyshorecommunities.Also,LCSsofferedlessstructurallycomplexhabitatsforcolonisationandinsomelocationsexperiencedhigherdisturbancethannaturalshores.WeproposeseveralcriteriathatcanbeintegratedintothedesignandconstructionofLCSstominimiseecologicalimpactsandallowtargetedmanagementofdiversityandnaturallivingresources.

ArticleOutline

1.Introduction

2.Materialandmethods

2.1.Studysitesandgeneralmethodologicalapproach

2.2.Comparisonofdiversitybetweenlowcrestedstructuresandnaturalrockyshores

2.3.EffectsofLCSdesignfeaturesonepibioticassemblages

2.3.1.Orientation

2.3.2.Locationontheshore

2.3.3.Habitatcomplexity

2.3.4.Disturbance:

structuralstabilityandscouringofLCS

3.Results

3.1.EpibiotaofLCSsversusrockyshorecommunities

3.2.EffectsofLCSdesignfeaturesonepibiota

3.2.1.Orientation

3.2.2.Locationontheshore（tidalheight）

3.2.3.Habitatcomplexity

3.2.4.Disturbance:

structuralstabilityandscouring

4.Discussion

4.1.CanLCSsbeviewedasartificialrockyshores?

4.2.Influenceofengineeringdesignonepibiota:

whatcanandcannotbemodified

5.Conclusions

Acknowledgements

References

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Carbonfiberreinforcedplasticsinaircraftconstruction  OriginalResearchArticle

MaterialsScienceandEngineering:

A,Volume412,Issues1-2,5December2005,Pages171-176

C.Soutis

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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences

Abstract

FibrouscompositeshavefoundapplicationsinaircraftfromthefirstflightoftheWrightBrothers’Flyer1,inNorthCarolinaonDecember17th,1903,totheplethoraofusesnowenjoyedbythemonbothmilitaryandcivilaircraft,inadditiontomoreexoticapplicationsonunmannedaerialvehicles,spacelaunchers,andsatellites.Theirgrowingusehasarisenfromtheirhighspecificstrengthandstiffness,whencomparedtothemoreconventionalmaterials,andtheabilitytoshapeandtailortheirstructuretoproducemoreaerodynamicallyefficientstructuralconfigurations.Inthispaper,itisarguedthatfiberreinforcedpolymers,especiallycarbonfiberreinforcedplasticscanandwillinthefuturecontributemorethan50%ofthestructuralmassofanaircraft.However,affordabilityisthekeytosurvivalinaerospacemanufacturing,whethercivilormilitary,andthereforeeffortshouldbedevotedtoanalysisandcomputationalsimulationofthemanufacturingandassemblyprocessaswellasthesimulationoftheperformanceofthestructure,sincetheyareintimatelyconnected.

ArticleOutline

1.Carbonfiberreinforcedplastics

2.Designandanalysis

3.Manufacture

4.Applications

5.Summary

References

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Vibration-basedskindamagestatisticaldetectionandrestorationassessmentinastiffenedaircraftpanel  OriginalResearchArticle

MechanicalSystemsandSignalProcessing,Volume22,Issue2,February2008,Pages315-337

D.D.Rizos,S.D.Fassois,Z.P.Marioli-Riga,A.N.Karanika

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Abstract

Thecombinedproblemofskindamagedetectionandrestorationqualityassessmentinlightweightstiffenedaircraftpanelsviavibrationtestingisconsidered.Twomethodsthatemploystatisticalestimationandhypothesistestingproceduresandarecapableofaccountingforexperimentaluncertaintyareintroduced.Thefirstisparametricandemploysnaturalfrequencyanddampingratiointervalestimates.Thesecondisnon-parametricandemployscoherencefunctionintervalestimates.Themethods’effectivenessisassessedthroughlaboratoryexperimentswithastiffenedaircraftpanel.Theresultsofthestudyindicatethefeasibilityofthevibration-basedmethodologyfortacklingboththeskindamagedetectionandrestorationqualityassessmentproblems.Itisalsoshownthatthefirstmethodiseffectivefortheskindamagedetectionproblem,whilethesecondforboththeskindamagedetectionandrestorationqualityassessmentproblems.

ArticleOutline

Nomenclature

Importantconventionsandsymbols

1.Introduction

2.Thepanelandtheexperiments

2.1.Thepanel,skindamageanditsrestoration

2.2.Theexperiments

2.3.Thevibrationsignals

2.4.Experimentalrepeatabilityassessment

3.TheSDD/RQAvibration-basedmethodology:

theMPBMandCMBMmethods

3.1.Thevibration-basedmethodology

3.1.1.Theoperationalviewpoint

3.1.2.Theconceptualviewpoint

3.2.Themodalparameter-basedmethod（MPBM）

3.2.1.Statisticaldecisionmaking

3.3.Thecoherencemeasure-basedmethod（CMBM）

3.3.1.Statisticaldecisionmaking

4.Experimentalresults

4.1.Themodalparameter-basedmethod（MPBM）

4.1.1.Baselinephase

4.1.2.Inspectionphase:

theSDDandRQAproblems

4.2.Thecoherencemeasure-basedmethod（CMBM）

4.2.1.Baselinephase

4.2.2.Inspectionphase

5.Conclusions

Acknowledgements

References

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Estimationofdirectivityandsoundpowerlevelsemittedbyaircraftsduringtaxiing,foroutdoornoisepredictionpurpose  OriginalResearchArticle

AppliedAcoustics,Volume68,Issue10,October2007,Pages1263-1279

C.Asensio,I.Pavón,M.Ruiz,R.Pagan,M.Recuero

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Abstract

Integratednoisemodel（INM）isthemostinternationallyusedsoftwaretocalculatenoiselevelsnearairports.Takeoff,landingorpassbyoperationscanbemodeledbyINM,butitdoesnotconsideraircraftstaxiing,which,insomecases,canbeimportanttoaccuratelyevaluateandreduceairports’noiseassessment.

Aircrafttaxiingnoiseemissioncanbepredictedusingotherpredictiontoolsbasedonstandardsthatdescribesoundattenuationduringpropagationoutdoors.Butthesetoolsrequiredatainputsthatarenotknown:

directivityandsoundpowerlevelsemittedbyaircraftduringtaxiing.

Thispaperdescribesmethodsusedtocalculatedirectivityindexesandsoundpowerlevels,basedonfieldmeasurementsmadeinMadrid-BarajasAirport（Spain）.Obtainedresultscanbeusedasinputsforgeneralpurposeoutdoorsoundpredictionsoftware,whichwillbeabletoevaluatenoiseatairportsvicinityasindustrialnoise.

Directivityandsoundpowerlevelshavebeenestimatedinoctaveandthirdoctavebandterms,forseveralaircraftfamilies.

ArticleOutline

1.Introduction

2.Soundpowerlevels

2.1.Measurementplatform

2.2.Microphonepositions

2.3.Equipment

2.4.Measurements

2.5.Dataprocessing

2.6.Results

3.Directivityindex

3.1.Propelleraircrafts

3.2.Jetaircrafts

4.Discussion

4.1.Soundpowerlevels

4.2.Directivity

4.3.General

Acknowledgements

References

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Strategicplanninginfractionalaircraftownershipprograms  OriginalResearchArticle

EuropeanJournalofOperationalResearch,Volume189,Issue2,1September2008,Pages526-539

YufengYao,ÖzlemErgun,EllisJohnson,WilliamSchultz,J.M.Singleton

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Abstract

Inthefractionalownershipmodel,thepartialownerofanaircraftisentitledtocertainflighthoursperyear,andthemanagementcompanyisresponsibleforalltheoperationalconsiderationsoftheaircraftandformakinganaircraftavailabletotheownerattherequestedtimeandplace.Intherecentyearsalthoughtheindustryasawholehasexperiencedsignificantgrowth,mostofthemajorfractionaljetmanagementcompanieshavebeenunprofitable.Toincreaseprofitabilityamanagementcompanymustminimizeitsoperatingcostsandincreaseitscrewandaircraftutilization.Inthispaper,wepresentamethodologyforefficientlyschedulingtheavailableresourcesofafractionaljetmanagementcompanythattakesintoconsiderationthedetailsinrealworldsituations.Wethendiscussseveralstrategicplanningissues,includingaircraftmaintenance,crewswapping,demandincreaseanddifferentiation,andanalyzetheireffectsontheresourceutilizationandprofitability.

ArticleOutline

1.