资源描述：
《Differential Acoustic Resonance Spectroscopy for the acoustic measurement of small and irregular samples in the low frequency range. Journal of Geophysical Research》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、JOURNALOFGEOPHYSICALRESEARCH,VOL.117,B06203,doi:10.1029/2011JB008808,2012DifferentialAcousticResonanceSpectroscopyfortheacousticmeasurementofsmallandirregularsamplesinthelowfrequencyrange11122Shang-xuWang,Jian-guoZhao,Zhen-huaLi,JerryM.Harris,andYouliQuanReceived24August2011;revised20April
2、2012;accepted23April2012;published8June2012.[1]DifferentialAcousticResonanceSpectroscopy(DARS)hasbeendevelopedtoinvestigatetheacousticpropertiesofsamplesinthekilohertzfrequencyrange.Thisnewlaboratorymeasurementtechniqueexaminesthechangeinresonantfrequenciesofacavityperturbedbytheintroducti
3、onofasmalltestsample.Theresonantfrequencyshiftbetweentheemptyandsample-loadedcavityisusedtoestimatetheacousticpropertiesoftheloadedsample.ThispaperpresentsaDARSperturbationformulathatcombinesatheoreticalderivationwithnumericalsimulationandlaboratorymeasurements.Furthermore,asemi-empiricalc
4、alibrationtechniqueisproposedtoestimatetheacousticpropertiesofatestsample.ThisresearchdemonstratesthepotentialoftheDARSmeasurementtechniqueforestimatingtheacousticpropertiesofacousticallysmalland/orirregularlyshapedsamples.Citation:Wang,S.,J.Zhao,Z.Li,J.M.Harris,andY.Quan(2012),Differentia
5、lAcousticResonanceSpectroscopyfortheacousticmeasurementofsmallandirregularsamplesinthelowfrequencyrange,J.Geophys.Res.,117,B06203,doi:10.1029/2011JB008808.1.Introductionrespectively.Thepulsetransmissiontechniqueoperatesinthehundredsofkilohertzrange[Birch,1960,1961;Wyllie[2]Severalprincipal
6、experimentalmethodsexisttomea-etal.,1956;Batzleetal.,2006].suretheacousticpropertiesasafunctionoffrequencyfor[3]Theresonantbartechniquediffersfrompulsetrans-samplesrangingincompressibilityfromhigh(elastomers)tomissioninthatitcanoperateinthekilohertzrange.Inthislow(porousrock).Twocommonlabo
7、ratorytechniquesthatmethod,acylindricalorparallelepipedsampleisdrivenintomeasuretheacousticpropertiesofsamplesarepulsetrans-orthrougharesonantvibrationusingasinusoidalforce.Themissionandresonantbarmethods[Harrisetal.,2005].Innumerousmodesthatarepossibleinclude
