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1.
IntroductionTwo_degree_of_freedomsystemshavingcubicnonlinearitiesareextensivelyusedinphysics,mechanics.Forexample :thelarge_amplitudevibrationsofstrings,beams,membranesandplates ,dynamicvibration_isolationsystems ,dynamicvibrationabsorbers,themotionofsphe…  相似文献   

2.
IntroductionHowtheintensionandmoduleofsteelfibrereinforcedconcrete (SFRC)dependsonitsconstituentpropertiesandcontentisaprincipalproblemtopredictmacro_mechanicspropertiesofSFRC,thekeyconsistsintheconfirmationofstressdistribution .Interfacialstresstransfe…  相似文献   

3.
IntroductionThetransientanalysisfor 3_Delastodynamiccrackproblemsisanimportantcontentinfracturemechanics.Becauseofthedifficultiesoftheproblems,thecalculationofDSIFfor 3_Dcrackisaproblemunsolvedcompletelyuptothepresent.Chen[1]firstlyusedthefinitedifference…  相似文献   

4.
IntroductionInthispaper,wediscussnon_stationaryHamiltonianmechanics .Hamiltonianmechanicsisanimportantpartyofanalyticalmechanics[1].ThestationaryHamiltonianmechanicsisestablishedonthecotangentbundleoftheconfigurationspace—Riemannianmanifoldofmotionalsys…  相似文献   

5.
IntroductionOfallthefiber_reinforcedcompositematerials,theshort_fibercompositematerialnotonlystrengthensthematrixbutavoidsdefectionsofthelong_fibercompositematerialaswell.Themicro_mechanicsaboutitsuchasfracture ,fatigueanddamageisverycomplex .Intheprevi…  相似文献   

6.
IntroductionTheproblemofgivendifferentialequationandseekingitsequivalentHamiltonianiansystembelongstoinverseproblemofanalyticalmechanics,andthelatterisoneofprimeproblemsinclassicalmechanics.ThefamousPoincare_CartonproblemistogettheHamiltonianianregula…  相似文献   

7.
IntroductionIn 50’s,greatprogresshadbeenmadeontheresearchofvariationalprincipleinsolidmechanicswithHu_Washizugeneralizedvariationalprinciple(GVP) [1]asmilestone ,andinfluidmechanicswithC .C .Lin’sconstrains[2 ]asmilestone .In 80’s,ChienWei_zangdeducedamoregeneral…  相似文献   

8.
IntroductionThetheoryonPoincar啨_Cartanintegralinvarianthasfounditsimportantapplicationsinphysicsandmechanics.However,ithasbeenacceptedthatthetheoryisonlysuitableforHamiltoniansystemsandintegralinvariantsdonotexistfornon_HamiltoniansystemswhichadmitintegralvariantsofPoincar啨_Cartan’stypeinstead[1- 3].SomeextensionsofPoincar啨_Cartanintegralinvariantsaregivenin…  相似文献   

9.
IntroductionSincefiniteelementanalysisprogramsdealwiththetheoriesandmethodsofthreefieldsofmechanics,appliedmathematicsandcomputerscience,theyarecomplicatedanderror_prone .Duringdevelopmentpeopleallthroughseekthemethodtoimproveprograms.Theobject_oriente…  相似文献   

10.
IntroductionVibrationsofsteppedthinrectangularplateshavebeenresearchedbymechanicalworkers.ErcoliandLauraanalyzedvibrationsoftwo_stepthinrectangularplates[1],ZhangYingshietalstudiedvibrationsofn_stepone_waythinrectangularplatesonWinkler’sfoundation[1],ofn…  相似文献   

11.
IntroductionInthepaper (Ⅰ ) (see:AppliedMathematicsandMechanics (EnglishEdition) ,2 0 0 0 ,2 1 (7) :82 5-83 5) ,wehaveestablishedthedynamicsinNewtonian_Riemannianspace_time,andgiveitsapplicationtoHydromechanics.ThereisGalileo’sprincipleofrelativityinClassicalNewton’smecha…  相似文献   

12.
IntroductionDuetothepiezoelectricmaterials’extensiveapplicationsinsmartstructures,itisveryimportanttoprobeintotheirmechanismasdistributionsensorsandactuators[1].Asitisdifficulttofindananalyticalsolutiontotheelectric_mechanicalcouplingproblem,thenumerica…  相似文献   

13.
IntroductionInrecentyears,agreatdealofattentionhasbeendirectedtowardsfullcoupledthermo_hydro_mechanicalanalysisindeformingporousmediaduetoextractionofundergroundfluids(water,petroleum ,naturalgas)inreservoir,environmentandconstructionengineering (Lewisan…  相似文献   

14.
Modeling and analysis of a coupled rigid-flexible system   总被引:1,自引:0,他引:1  
IntroductionManymechanicalsystemssuchasrobotmanipulator,turbineblades,helicopterpropellerandman_madesatellitewithflexibleattachmentsarecomposedofrigidandflexiblebodies.Theyarecalledcoupledrigid_flexiblesystems.Correctpredictionsofthebehaviorofflexibl…  相似文献   

15.
IntroductionIt’sknownthatinnumericalapproximationoffirst_orderhyperbolicequations,theuseofadaptivefiniteelementmethods (see [1 ] )hasbeenexpandedtomanyfieldssuchascomputationalflowmechanics,thermalanalyses,electricalengineering ,etc.Theh_versionadaptivefini…  相似文献   

16.
IntroductionTostudypotentialsandchargedensitiesofatomsinquantummechanics,itissummedupassolvingSchrdingerequationwithwavefunctionψ(r):-122 V(r)ψ(r)=Eψ(r),(1)|ψ(0)|<M,|ψ(r)||r|→∞=0(2)andthecruxofthematterisgoingtodetermineV(r).Thus,theknownThomas_Fermiequation,obtainedi…  相似文献   

17.
IntroductionItiswell_knownthatpiezoelectricmaterialsproduceanelectricfieldwhendeformedandundergodeformationwhensubjectedtoanelectricfield .Thecouplingnatureofpiezoelectricmaterialshasattractedwideapplicationsinelectric_mechanicalandelectricdevices,suc…  相似文献   

18.
IntroductionInsoilmechanics,theproblemsdealingwithstressinfoundationsareusuallyreferredastheBoussinesqsolutionsandtheCerrutiones (Love[1 ] ;Lure[2 ] ) .Furtherinvestigation (Bardew[3 ] ;Gibson[4 ] )tookthefoundationasapproximationoftransverselyisotropichalf_space .M…  相似文献   

19.
IntroductionAsageneralizationoftheclasicalfieldtheory,nonlocalfieldtheorycanbeusedasthetheoreticalbaseinmacro_micromechanicsb...  相似文献   

20.
IntroductionThelastfourdecadeshavewitnessedtheinaugurationofanoveltheoryofmaterialbodies,namedthenon_localmechanics.ThiswasdoneprimarilyduetotheeffortsofEdelen[1],Eringen[2 ],GreenandRivlin[3].Accordingtothenon_localtheory ,thestressatapointXinabodydependsno…  相似文献   

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