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1.
COMPUTATION OF SUPERSONIC TURBULENT FLOWFIELD WITH TRANSVERSE INJECTION   总被引:1,自引:0,他引:1  
IntroductionThemixingflowfieldresultingfromasonicgaseousinjectioninjectedtransverselyintoasupersonicfreestreamisencounteredinmanyfieldssuchasrocketmotorthrustvectorcontrolsystems,supersoniccombustion ,high_speedflightvehiclereactioncontroljets,andgas_t…  相似文献   

2.
Dynamical Behavior of Viscoelastic Cylindrical Shells Under Axial Pressures   总被引:1,自引:1,他引:0  
IntroductionTheoryofviscoelasticityanditsapplicationshavebeenbecomingaveryattractiveresearchfieldsinceviscoelasticstructureswerewidelyappliedintovariousengineering .Buttotheauthors’knowledge,therearerareforpapersconcerningwithdynamicalbehaviorofviscoe…  相似文献   

3.
ON THE ASYMPTOTIC BEHAVIOR OF HOPFIELD NEURAL NETWORK WITH PERIODIC INPUTS   总被引:3,自引:0,他引:3  
IntroductionSincethespecialsuperiorityofartificialneuralnetworkstechnologyinvariousengineeringtechniquesfields,suchasoptimization ,associativememories,patternrecognition ,signalprocessingandautomaticcontrol,therehasbeenincreasinginterestintheinvestigati…  相似文献   

4.
IntroductionDynamicstabilityanalysisofviscoelasticstructuresismuchmorecomplicatedsincethemathematicalmodelturnsouttobeasystemofintegro_partial_differentialequations,ratherthanasystemofpartialdifferentialonesasintheelasticstructure[1].Manyworkshavebeenp…  相似文献   

5.
IntroductionTheprinciplesofvirtualpowerandincrementalvirtualpoweraswellastheequationsofmotionandthestressboundaryconditionsofincrementalratetypeinclassicalcontinuummechanicshavebeensystematicallydiscussedbyKUANG[1].Thepurposeofthispaperistwofold :1 )Toes…  相似文献   

6.
IntroductionThediscoveryofquasicrystalaround 1 984 [1,2 ,3]issignificantbreakthroughforcondensedmatterphysicsinrecentyears.Thequasiperiodicsymmetryofsolidpresentsgreattheoreticalsignificance .Numerousquasicrystallinematerialswithstablepropertywereproduced ,thi…  相似文献   

7.
IntroductionConservationlawofmechanicalsystemnotonlyhasimportanceinmathematicsbutalsorevealsprofoundphysicallaw .Therearemanymethodsinfindingconservationlawofamechanicalsystem .Inanalyticalmechanicsthetraditionalmethodistodirectlyderivethecircularinteg…  相似文献   

8.
A FORM INVARIANCE OF CONSTRAINED BIRKHOFFIAN SYSTEM   总被引:2,自引:0,他引:2  
IntroductionThestudyofthedynamicsofBirkhoffiansystemisanactivebranchinthemodernclassicalmathematicsandamoderndevelopingdirectioninmathematicphysics ,andcanbeappliedtoquantummechanics,statisticalmechanics ,biologicphysics,mechanicsofspaceflightandsomefie…  相似文献   

9.
IntroductionThedynamicresponseofsaturatedporousmediumisthebasicissue,whichisapplicableingeophysicalexploration ,seismologicalengineering ,oilexploration ,disposalofnuclearwastes,hydraulicengineeringandcivilengineering .Sincetheconstitutiverelationsandwave…  相似文献   

10.
IntroductionInthecaseofgeometricnonlinearity ,themathematicalmodelofviscoelasticstructuresgenerallyisthesystemofnonlinearintegro_partial_differentialequations.Itisverydifficulttofindtheexactsolutiontosuchproblems.Onlynumericalsolutionscouldbeobtainedby…  相似文献   

11.
IntroductionThereareoftensomestructuresorcomponentswhichcanonlytransferonespecialformofstress,suchasthecablewhichcanonlybeusedtotransferthetensionstressandthecontactcomponentwhichcanonlytransferthepressure.Ingeneral,suchproblemsareoftencalledtheunilat…  相似文献   

12.
IntroductionInrecentyears,researchershavebeenmadeonthevariousformulaeofD’Alembertprinciple,attentionhasbeengiventomechanicalprinciplesinthevelocityspaceandthevariationalprincipleinthevelocityspace,andthevelocityspaceofrelativisticmechanicshasbeenmade…  相似文献   

13.
IntroductionForalongtimetheeffectoftemperatureonthevibrationofplateshasdrawngreatattentioninthefieldofaeronauticsandastronautics,chemistry,nuclearpowerandmechanicalengineering.Incorrespondingtheoreticalanalysisthenonlineareffectshouldbetakenintoconsi…  相似文献   

14.
IntroductionThestaticsanddynamicsofrectangularplateshavealwaysbeenofparticularresearchinterestinsolidmechanics.Inparticular,theemergenceofnewmaterialsandnewstructureshasbroughtoutendlessvitalforceintothestudy .Itiswell_knownthattheclassicalplatetheoryb…  相似文献   

15.
IntroductionDuetotheirintrinsicelectromechanicalcouplingproperties,piezoelectricceramicshavebeenextensivelyusedindesignofvariouselectronicandelectromechanicaldevicessuchassensorsandactuators.Inrecentyears,mechanicalanalysisofdislocations ,cracks,cavitie…  相似文献   

16.
IntroductionTheproblemofgivendifferentialequationandseekingitsequivalentHamiltonianiansystembelongstoinverseproblemofanalyticalmechanics,andthelatterisoneofprimeproblemsinclassicalmechanics.ThefamousPoincare_CartonproblemistogettheHamiltonianianregula…  相似文献   

17.
IntroductionTheinterfacialdebondingmaycausethemicrovoids’nucleationinaparticle_reinforcedcomposite .Theinterfacialdebondingisusuallygovernedbythetensionstresscriterion[1,2 ]orenergycriterion[3,4].Intherecentresearchworks,thepresentauthorspointedoutthatthean…  相似文献   

18.
IntroductionTheuseoflaminatedcompositesinthin_walledstructuresincreasessothateffectsoftransversesheardeformationscannotbeneglectedandinvokequitecomplexesinnonlinearanalysis.Itiswell_knownthatthenonlinearanalysisoflaminatedplatesandshellscountingfortr…  相似文献   

19.
IntroductionAccordingtoLove[1],Saint_Venant’sPrinciplecanbeexpressedas:Theeffectofaself-equilibratedsystemofforcesactinginaspherewillrestrictinasmalldomainnearthesphere .Thisprincipleisthebridgebetweentheelasticitytheoryandapplication ,butithasnotbeenprov…  相似文献   

20.
IntroductionFatiguefractrueisaprimarymodeoffailureformetallicstructuresandmechanicalsystemssubjectedtovariousdynamicloads.Atthebeginningofservice,someinherentdefectssuchasmicrocracks,weldingdefects,notches,voidsetc.existinmanystructuresorelements.Thesed…  相似文献   

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