预览加载中，请您耐心等待几秒...

基于时频分析的岩石超声衰减计算方法（英文）.docx

预览
1/3
2/3
3/3

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于时频分析的岩石超声衰减计算方法（英文） Title:UltrasonicAttenuationCalculationMethodforRockBasedonTime-FrequencyAnalysis Abstract: Rockattenuationisanimportantparameterinmanygeophysicalandgeotechnicalstudies.Accurateestimationofrockattenuationisvitalforvariousapplications,includingoilandgasexploration,earthquakeengineering,andminingoperations.Thispaperpresentsanewmethodforcalculatingrockattenuationbasedontime-frequencyanalysisofultrasonicsignals.Theproposedapproachprovidesacomprehensiveunderstandingofthetemporalandfrequencycharacteristicsofrockattenuation. 1.Introduction Rockattenuation,definedasthereductionofultrasonicwaveamplitudeasitpropagatesthrougharockmedium,isinfluencedbyvariousfactorssuchasrocktype,porosity,andsaturation.Accurateestimationofrockattenuationisessentialforassessingrockstrength,detectingfractures,andpredictingrockbehaviorunderdifferentconditions.Traditionalmethodsformeasuringrockattenuationinvolveexperimentalproceduresthataretime-consumingandcostly.Theproposedmethodaimstoprovideamoreefficientandreliableapproachforcalculatingrockattenuation. 2.Time-FrequencyAnalysis Time-frequencyanalysisisapowerfultoolforexaminingthetime-varyingcharacteristicsofsignals.UnliketraditionalFourieranalysis,whichonlyprovidesfrequencyinformation,time-frequencyanalysistechniquessuchastheshort-timeFouriertransform(STFT),wavelettransform,andspectrogramallowustoobtainbothtimeandfrequencyinformationsimultaneously.Thesetechniquesarewidelyusedinvariousfields,includingsignalprocessing,imageanalysis,andmedicaldiagnostics.Inthecontextofrockattenuationestimation,time-frequencyanalysisenablestheextractionofvaluabletemporalandfrequencyfeaturesthatcorrelatewiththeattenuationpropertiesoftherock. 3.Methodology Theproposedmethodforrockattenuationcalculationinvolvesthefollowingsteps: 3.1DataAcquisition Ultrasonicsignalsarecollectedbytransmittingashortpulseofhigh-frequencysoundwavesintotherocksampleandmeasuringthereceivedsignal.Thedataacquisitionsetupconsistsofanultrasonictransducerandareceiver.Thetransmi