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1.
Nomenclatureαj:phasejvolumefraction;uj:phasejvelocityvector;U :meanvelocityvector;U :meanaxialvelocity;Uo:meanx_axialvelocityoftheexit;U∞ :velocityofjettingdevice;ΔU :jumpingvelocityofmovingjet,characteristicvelocityofflow_field ,ΔU =Uo-U∞ ;p:pressure;P :eigenpres…  相似文献   

2.
Nomenclature αs:particlevolumefraction; ug:gasinstantaneousvelocityvector; us:particleinstantaneousvelocityvector; U :meanaxialvelocityoftwo_phasejet; U0 :x_axialvelocityoftheexit,characteristicve locityofflow_field; p:instantaneousflow_fieldpressure;  p:mean…  相似文献   

3.
IntroductionItiswell_knownthatthebasiccharacteristicsofnonlinearintegralequationofVolterratypearefundamentallydifferentfromthatofHammersteintype:Hammersteinintegralequationhasafixedupperlimitofintegration.Thismeansthatasolutionmustalwaysbedefinedovere…  相似文献   

4.
IntroductionShallowwaterflowexistsverywidelyinhydraulicengineering .Pollutantdiffusionthatismainlycontrolledbytheshallowwaterflowhasbroughtincreasinglyattentioninenvironmentalengineering.Thetwo_dimensionalmodelfordescribingtheflowcharacteristicshasbee…  相似文献   

5.
IntroductionDuetotheintrinsiccouplingcharacteristicsbetweenelectricandelasticbehaviors,thatis,appliedmechanicalloadingproduceselasticdeformation ,aswellaselectricfield ,andconverselyelectricfieldcangiverisetoelasticdeformation ,piezoelectricmaterialshave…  相似文献   

6.
IntroductionTheflowtheoryanditsapplicationoffluidsflowinafractalreservoirhavecontinuallygonedeepintostudysinceChangandYortsos[1]builttheflowmodeloffluidthroughafractalreservoir.TONGDeng_ke[2 ]presentedtheexactsolutionanditspressurecharacteristicsfortheva…  相似文献   

7.
IntroductionTurbulentflowisanonlinearstochasticprocessandoneofitsbasiccharacteristicsislargereffectivetransportcapabilitythanthatoflaminarflow .Ingeneral,transportinfluidsisgradient,i.e.momentum ,energyaretransportedfromthehighervalueregiontothelowervalu…  相似文献   

8.
IntroductionAsakindofimportantthermalcharacteristicsofthematerial,thermalconductivitymustbedeterminedtomakequantificationalanalysisoftemperaturefield .Ithasbeentakendueattentiontoestimatethethermalconductivityfrominnerand/orboundarytemperaturemeasureme…  相似文献   

9.
Asweknow,itisthecharacteristicoftheflexiblemultibodysystemthattherigidmotioniscoupledwiththeflexibledeformation[1~3].Therefore,fortheflexiblemultibodysystrm,itisnecessarytoinvestigatetheregularofthedestabilizationandbifurcationofitsconfigurationbefor…  相似文献   

10.
IntroductionSoundradiationfromthedoubleshellswhicharethemainstructureofsubmarinehullsunderexcitationinfluidmediumisveryimportantforstudyingthesubmarinehidingtechnology .Forthevibrationcharacteristicofdoubleconcentricshells,ithasbeenstudiedontheoryande…  相似文献   

11.
Afundamentalcharacteristicofplasmasistheir,abilitytosmearoutelectricfields.ThisisatypicalnonlinearproblemofsolvingthePoissonequation.Thepreviousstudyofthenonlinearproblemisusuallybasedonalinearizedmethodwhenthepotentialenergyoftheparticlesismuchsmalle…  相似文献   

12.
IntroductionThetransientphenomenaofdynamicproblemsandthemannerstotreatthemaregenerallyrelatedtothespectralcharacteristicsofexcitation .Onemayomitpropagatingwavesifrelativelylowerfrequenciesgoverntheresponsesintheproblemssuchasseismicresponsesandrespon…  相似文献   

13.
Scattering of Plane SH-Wave by a Cylindrical Hill of Arbitrary Shape   总被引:7,自引:1,他引:6  
IntroductionInearthquakeengineering ,itisimportantfordesignerstostudytheeffectsofsurfacetopographyoncharacteristicsofstrongearthquakemotion .Manystudiesonthissubjecthavebeencarriedoutinthepasttwentyyears.Trifunac[1]gottheseriessolutiontoscatteringofplane…  相似文献   

14.
ViscoelasticcharacteristicsofexpandedskinaftergraftingZengYanjun ,HuangKun ,XuChuanqing ,ZhangJing ,SunGuangci  (Ⅰ 1 )……………AgeneralrefinedshelltheoryfornonlinearanalysisoftiresZhangJianwu ,JiaLiping ,ShuYongping  (Ⅰ 8)…………………………………………Investigationofdynamicfra…  相似文献   

15.
IntroductionMethodofcharacteristics (MOC)hasstillbeenthepowerfultooltoanalyzehydraulictransientofpipelineflowsincethe 1 960s.Seldomhasthethermaltransientbeentakenintoaccount.Heatduetofrictionvarieswhenflowratechangedbecauseofvariouskindsofreasons,whichcaus…  相似文献   

16.
IntroductionThetwo_phaseflowwithcylinderparticlesisadifficultmatterintheoreticalresearchofmultiphaseflowandnon_Newtonianflow ,soitisacademicallyvaluabletostudyit.Meanwhile ,suchflowshaveabroadbackgroundinindustry .Inthematerialscience,themoldingandproces…  相似文献   

17.
IntroductionRecently ,theferroelectricceramicshassuchexcellentcharacteristicsofpiezoelectricityandpyroelectricityetc .thatitbecomesoneofthemostimportantfunctionalmaterials.Forinstance ,thewidelyappliedsensors,transducersandactuatorsetc .aremadeoftheferroe…  相似文献   

18.
IntroductionConsiderthesystemofpartialdifferentialalgebraicequations (PDAEs) :Σ : Pi(y1,y2 ,… ,yn) =0   (i =1,2 ,… ,r) ,wherethecoefficientsareinthedifferentialfieldKwithcharacteristiczero .TheimportantquestionishowtosolvethisPDAEsinthetheoryofpartialdifferentialequa…  相似文献   

19.
IntroductionDynamicstabilityanalysisofviscoelasticstructuresismuchmorecomplicatedsincethemathematicalmodelturnsouttobeasystemofintegro_partial_differentialequations,ratherthanasystemofpartialdifferentialonesasintheelasticstructure[1].Manyworkshavebeenp…  相似文献   

20.
IntroductionBellows,ashellofwrinkledmeridianofrevolution ,hasbeingincreasinglyusedinmodernequipmentasanelastic_sensitiveelementandaflexiblejoint.Theformerisusuallysubjectedtolargedisplacementsatitsends,andthelattermaypartlyenterintoplasticstate .Hence ,b…  相似文献   

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