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1、JournalofMechanicalStrength2005,27(3):288～295X近場(chǎng)聲全息理論與應(yīng)用的研究現(xiàn)狀與展望REVIEWANDOUTLOOKOFRESEARCHESONNEARFIELDACOUSTICALHOLOGRAPHYTHEORIESWITHAPPLICATION蔣偉康XX 萬(wàn) 泉(上海交通大學(xué)振動(dòng)、沖擊、噪聲國(guó)家重點(diǎn)實(shí)驗(yàn)室,上海200030)JIANGWeiKangWANQuan(StateKeyLaboratoryofVibration,ShockandNoise,ShanghaiJiaotongUniversity,Shanghai200030
2、,China)摘要 回顧近場(chǎng)聲全息(NAH,nearfieldacousticalholography)理論與應(yīng)用的發(fā)展歷史及國(guó)內(nèi)外研究現(xiàn)狀。對(duì)NAH技術(shù)進(jìn)行分類,并對(duì)各類NAH技術(shù)的重建算法及適用范圍進(jìn)行評(píng)述。重點(diǎn)介紹近十幾年來(lái)NAH的發(fā)展:正交共形結(jié)構(gòu)NAH技術(shù)中關(guān)于測(cè)量孔徑有限性對(duì)重建精度影響的研究,特別是關(guān)于數(shù)據(jù)外推技術(shù)的發(fā)展;全息面數(shù)據(jù)采集方法研究,包括參考源互譜測(cè)量法及基于聲強(qiáng)測(cè)量的寬帶聲全息重建技術(shù)(broadbandacousticalholographyfromintensitymeasurement,BAHIM)法;任意形結(jié)構(gòu)NAH技術(shù)中聲場(chǎng)重建病態(tài)性研究的
3、發(fā)展,特別是正則化理論的應(yīng)用;NAH在工程中的應(yīng)用研究,包括移動(dòng)聲源、封閉空間聲場(chǎng)等場(chǎng)合的應(yīng)用等。另外,還介紹一些其他的聲場(chǎng)重建技術(shù),包括Helmholtz積分方程最小均方誤差法(HELS)、邊界點(diǎn)方法等。最后,討論NAH研究有待解決的問題,并探討NAH研究的發(fā)展趨勢(shì)。關(guān)鍵詞 近場(chǎng)聲全息 數(shù)據(jù)外推 正則化方法 等效源方法 邊界點(diǎn)方法中圖分類號(hào) TB525AbstractTheresearchesonnearfieldacousticalholography(NAH)arereviewed.NAHtechniquesareclassified,andtheirre2constru
4、ctionalgorithmandscopesofapplicationarealsointroduced.ThemaindevelopmentsofNAHinneardecadesareemphaticallydiscussedsuchasaboutsolvingtheimplementtoreconstructionprecisionoffinitenessofthemeasurementapertureinorthonormalandconformalNAHtechnique,especially,theapplicationofthedataextrapolationm
5、ethodinNAH,aboutthesamplingmethodofhologramdataincludingspatialtransformationofsoundfieldwithmultiplereferenceandBAHIM(broadbandacousticalholographyfromintensitymeasurement),aboutill2posedinverseproblemofBEM(boundaryelementmethod)2basedNAH,especially,theapplicationofregular2izationmethodinNA
6、H,theapplicationofNAHinengineeringincludingmovingsourceandsoundfieldofenclosedspaces,etc.Inaddi2tion,othertechniquesaboutsoundfieldreconstructionareintroducedincludingHelmholtzequationleastsquaresandboundarypointmethod,etc.Finally,thecurrentdifficultiesinNAHarediscussed,andapreviewofthefutur
7、edevelopmentisprovided.KeywordsNearfieldacousticholography;Dataextrapolation;Regularizationmethod;Equivalentsourcesmethod;Bound2arypointmethodCorrespondingauthor:JIANGWeiKang,E2mail:weikang@sjtu.edu.cn,Fax:+862212629322202819Manuscriptreceived20041
