三维超声波声场建模仿真在无损检测中的应用-樊振军

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CoalMineMachineryVol.32No.07Jul.201132072011070,。。,,,,,,。,、、,。,,,。,。1。,。,,。p、I、Z、Sv。p=ρcωAcos(ωt+φ)=ρcv(1)I=12ρcA2ω2(2)Z=ρc(3)ρ———;A———,;ω———;c———;v———;t———。:(1),。,p=p0dSrsin(ωt-kr)(4)p0———;dS———;r———;*,(,030051):,MATLAB,,。、,,、、。:;;;:TP391:A:1003-0794(2011)07-0257-03Applicationof3-DUltrasonicFieldModelingandSimulationinNondestructiveTestingFANZhen-jun,ZHANGJi-tang(SchoolofMechanicalEngineeringandAutomatization,NorthUniversityofChina,Taiyuan030051,China)Abstract:Basedonradiated3-Dsoundfieldmodelofultrasonicprobe,usingMATLABdevelopmentvisualgraphics,three-dimensionalsimulationresultscanshowe.Theparameterofsoundfieldcanchangewithman-machineinteractive.Soundfieldsimulationandvisualizationispropitioustocomprehendsoundfieldvisuallyanddirectly.Itcanprovidereferenceforanalyzingandresearchingultrasonicsoundfield,forselectmanufacturingparametersoftransducers,signaltransmitionandreception,forultrasoniccharacterizationandevaluationinengineeringbyanimagedirectly.Keywords:ultrasonicsoundfield;ultrasoundprobe;soundpressuredistribution;modelingandsimulating*(20100321056-02)257DOI:10.13436/j.mkjx.2011.07.0473207Vol.32No.07———,ω———;t———r;λ———;k———(k=2π/λ)。,,,,()(5)p={2p0sin[π(Rs2+r2姨-r)/λ]}sin(ωt-kr)(5)Rs———。(5),pt。,,:p=2p0sin[π(Rs2+r2姨-r)/λ](6)(6),。、,(r>3Rs2/λ)p(r,θ)=p0Fsλr2J1(kRssinθ)kRssinθsin(ωt-kr)(7)p(r,θ)=p0Fsλr2J1(kRssinθ)kRssinθ(8)Fs———,Fs=πRs2;J1———1;Rs———;p———r;r———。(2),,,p(r,θ,φ)=p0Fsλrsin(kdsinθcosφ)kdsinθcosφsin(kdsinφ)kdsinφ(9)Fs———,Fs=4ab。θ=φ=0,(8)p(r)=p0Fsλr(10)θ=0,2bp(r,φ)=p0Fsλrsin(kbsinφ)kbsinφ(11)φ=0,2dp(r,θ)=p0Fsλrsin(kdsinθ)kdsinθ(12)2,1,,。,。:;;;。,。1,MATALB,,。,。,2。22,,r。,,,rN(N,R2/λ),p(r)r,。。3,xoz。,,。25834420mm。4,,。。。4x,4y。f,,。。3MATLABGUI,,,,。,、。,、、,。,,。。:[1],,.[J].,2007,28(4):61-63.[2],,,.[M].:,2006.[3],,.MATLAB[M].:,2009.[4],,,.[J]..2002(3):98-101.[5],,.[J].,2010,31(10):62-64.[6],.[J].,1995,19(2):239-241.[7],.[K].:,2002.[8],,.-[J].NDT,2009,31(5):381-385.:(1982-),,,,:,,:fanzhenjun.2008@163.com.::2011-02-151,2(1.,256414;2.,255054):,、,,、。:;;:TH715.1:A:1003-0794(2011)07-0259-03DynamicTrackScaleJudgmentsandTreatmentFailureCHENHong-yu1,CHENWei2(1.ShandongVocationalCollegeofIndusrty,Zibo256414,China;2.HuadianZiboCogenerationPowerCo.,Ltd.,Zibo255054,China)Abstract:Thispaperintroducesdynamictrackscaleworksandclassification,anddetailedanalysisandelaborationofimpactofdynamictrackscalestable,accuratemeasurementofmajorfactors,combinedwithproductionandmanagementpractices,analyzed,andspecificimpactofdynamictrackscalestable,accuratemeasurementoffactorscorrespondingcountermeasures.Keywords:trackscale;faultdiagnosis;treatmentCoalMineMachineryVol.32No.07Jul.20113207201107!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!259

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