光纖Bragg光柵在瀝青路面性能健康監(jiān)測中的試驗(yàn)研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文光纖Bragg光柵在瀝青路面性能健康監(jiān)測中的試驗(yàn)研究姓名：劉樹龍申請學(xué)位級(jí)別：碩士專業(yè)：道路與鐵道工程指導(dǎo)教師：解建光201103光纖Bragg光柵在瀝青路面性能健康監(jiān)測中的試驗(yàn)研究iiABSTRACTInviewoftheasphaltpavementstraintest，AfiberBragggrating(FBG)strainsensbaredontheepoxyresintougheningisdes

2、ignedftheexperimentalstudyonstrainmonitingofasphaltconcrete，matrixmaterialsmechanicalpropertieshasbeenresearched，theresultshowsthatLimittensilestrengthis18~21Mpa，Compressiveultimatestrengthis70~78MpaElasticitycoefficient

3、is2.8~3.1Gpa，whicharesatisfiedtheroadbuildingintensityrequest，itcancodinatewiththebeamdisttionwhilethesenswearyperfmanceveryisalsowell.Designthesenscalibrationsystemfsenscalibration，theresultshowsthatthesenswavelengththe

4、strain、theloadarethelinearrelationshipsthecrelationcoefficientachievesabove0.99，Thesenssensitivitycoefficientis1.7085pmεwhichenhanced1.53timescomparedtothebaredfiberBragggrating，thepackagedeffectisobviousthatsensitivityc

5、oefficientishigherthanthesimilarstrainsens.Meanwhile，AnewpackagingtechniqueofFBGtemperaturesenswhicharenonsensitivewithfeignstressstrainbydoublelayerstructureinfluenceofadditionalstressstrainontheBraggwavelengthiselimina

6、ted，Accdingtotestdatathetemperaturesensitivitycoefficientsreach0.0642nm℃ComparedwiththebaredFBGthetemperaturesensitivitycoefficientsareincreased6.3times.Thetemperatureresolutionis0.1℃theredundantacteristicisgood.Thestrai

7、nsenstemperaturesenssisembeddedinSMA13rutspecimenfstaticdynamicexperiment，Accdingtostaticexperiment，thecrelationbetweenpressureaxialstrainis0.004εN，whentheloadsincreasewithaxialstrainincreased，Loadhasagoodacteristicsofre

8、peatlinearitytostrain.Monitingresultcanreflectfundamentalchangesofstraininstructurallayersofasphaltconcrete.Thedynamicexperimentshowsthatasphaltconcretehavegoodreflectionofthechangetrendsthesensresponseisgood、nodestructi

9、onthefatigueperfmancebetter，whichsenscanbeusedtomonitthestrainofasphaltpavement.Atlast，Thesimulationanalysisofstaticdynamictestaregivenbyapplyingfiniteelementsoftwareansys，resultsofstaticanalysisareunanimustomonitingresu

10、lts，thecrelationbetweenpressureaxialstrainis0.0046εN，Strainsensingfactη=0.87isaddedfrevisingloadstrain.Simulatethefirstdynamicloadfunction，F(xiàn)initeelementsimulationresultsisrelativelylargesensmeasurementresults，Butthesamer