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

2.
IntroductionConservationlawofmechanicalsystemnotonlyhasimportanceinmathematicsbutalsorevealsprofoundphysicallaw .In 1 91 8,basedoninvarianceofHamilton’sprincipleunderinfinitesimaltransformation ,theconservationlawofmechanicssystemwasstudiedbyGermanscientis…  相似文献   

3.
IntroductionH∞controltheoryhasbeenwelldevelopedsincetheDGKFpaper[1],wherethefundamentalequationsforH∞ measurementfeedbackcontrolarederivedfromtheseparationprinciple ,asinLQGcontroltheory[2~ 5 ].However,thecomputationforfinitehorizon [0 ,tf]problemandthedetermi…  相似文献   

4.
IntroductionInrecentyears,researchershavebeenmadeonthevariousformulaeofD’Alembertprinciple,attentionhasbeengiventomechanicalprinciplesinthevelocityspaceandthevariationalprincipleinthevelocityspace,andthevelocityspaceofrelativisticmechanicshasbeenmade…  相似文献   

5.
IntroductionIn 50’s,greatprogresshadbeenmadeontheresearchofvariationalprincipleinsolidmechanicswithHu_Washizugeneralizedvariationalprinciple(GVP) [1]asmilestone ,andinfluidmechanicswithC .C .Lin’sconstrains[2 ]asmilestone .In 80’s,ChienWei_zangdeducedamoregeneral…  相似文献   

6.
IntroductionTheasymptoticexpansionmatchedmethodwasdevelopedonthebasisofPlandtl’sBoundaryLayersTheory[1- 3].In 1 960’slater,thevalidmatchedprincipleswereadvancedbyVanDykeandKaplun[4 ,5 ],respectively .Buttheapplicablerangeofthemethodwasrestrictedbythedifficultyth…  相似文献   

7.
Nowadays,thecurrenttheoriesofplatesandshells,suchasKirchhoff’sthinplatetheoryandReissner’smoderatelythickplatetheoryetc.,aree...  相似文献   

8.
IntroductionFluidsthatobeyNewton’slawofviscosityarecalledNewtonianfluids.Newton’slawofviscosityisτ=μdu/dt,whereτistheshearstressandμistheviscosity .NotallfluidsfollowtheNewtonianstress_strainrelation .Somefluids ,suchasketchup ,areshearthinning ,thatis,thec…  相似文献   

9.
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   

10.
GENERALIZED H-KKM TYPE THEOREMS IN H-METRIC SPACES WITH APPLICATIONS   总被引:1,自引:0,他引:1  
IntroductionIn 1 996,Khamsi[1]establishedthehyperconvexversionofthefamousFan_KKMprincipleinhyperconvexspace .Yuan[2 ,3]obtainsomecharacterizationofKKMprincipleinhyperconvexspaces,andasapplicationsoftheirresults,somefixedpointtheoremsandmatchingtheoremsforopena…  相似文献   

11.
IntroductionIn 1 954,Hu[1,2 ]deducedHu_Washizuprinciplebyso_calledtrial_and_errormethod ,andin1 964 ,Chien[3]systematicallydiscussedtheLagrangemultipliermethod ,bywhichhesuccessfullydeducedHu_Washizuprinciple.Afterthatgeneralizedvariationalprinciplescanbearrivedat…  相似文献   

12.
IntroductionAmajorproblemofonedimensionaldynamicsistostudytheattractorsofintervalmaps,i.e.theclassificationandstructureofattractors.FollowingMilnor’sdefinitiononattractors[1],iffisaunimodalmapwithnegativeSchwarzianderivative ,thenbyGuckenheimer’stheorem[2 ]…  相似文献   

13.
IntroductionThetwo_phasedriveninporousmediaisanimportantsubjectofwideinterdisciplinaryconcern ,suchaspetroleumindustry ,subterranean ,chemicalprojectetc..It’sverydifficultifweadoptnumericalintegralmethodforthecaseofmultiphaseandmulticomposition ,thecruxof…  相似文献   

14.
Thedynamicresponseproblemsofelasticstructureholdmoreandmoreinterest.Intheearly1970’s.W.Y.Tsengetal.[1,2]investigatedfixed_endedbeams.First,thesinglemodeandtwomodeswereusedtotransformpartialdifferentialcontrollingequationsintoordinaldifferentialdynami…  相似文献   

15.
IntroductionIn [1 ] ,Dierkerintroducedtheconceptofessentialequilibriaforpureexchangeeconomiesandprovedthatin‘most’pureexchangeeconomies (inthesenseofBairecategory)allequilibriaareessential.In [2 ] ,theconceptofessentialequilibriaforproductioneconomieswasfirst…  相似文献   

16.
Anomalous dynamics response of nonlinear elastic bar   总被引:1,自引:0,他引:1  
IntroductionInresentyears,thechaoticbehaviorofbeamssubjectedtoperiodicloadbringsmoreandmorescholars’interests.In 1 983 ,FCMoonetal.[1]studiedthechaoticmotionsofbeamsinnonlinearboundaryconditions.In 1 994 ,S .AnanthaRamuandTSSankaretal.[2 ]analyzedbifurcationandCata…  相似文献   

17.
Introduction1 999isthe 90thanniversaryofthepublicationofE .F .Cosserat’sbook“TheoriedesCorpsDeformable”[1],whichwasthefoundationstoneandnowisstillaguidingmonographinthestudyofgeneralizedcontinuumfieldtheories.However,itwasnottillthepublicationofpapersofEricks…  相似文献   

18.
IntroductionInordertogetridoftherestrictiontodiscreteBabuska_Brezzi’sconditionsinresearchesofmixedfiniteelement (MFE)methods,oneusuallyusesthestabilizedMFEmethodsformat[1] .Thereareanumberofstabilizedmethods (see ,e.g .,Refs.[1- 7]andthereferencestherein) ,whichh…  相似文献   

19.
IntroductionAlmostalltheperturbationmethodsdependuponthesmallparameterassumption ,thatis,thesolutionofanonlinearequationcanbeexpressedintheformofpowerseriesinasmallparameterεu=u0 +εu1+ε2 u2 +… ,( 1 )whereu0 isthesolutionofunperturbedequationwhenε =0 ,thecorrection…  相似文献   

20.
IntroductionItiswell_knownthattheLaplacetransformoftheproductoftwotime_domainsignalsequalsthecomplexfrequency_domainconvolutionofindividualLaplacetransformsoftwosignals.Generally,theconvolutionoftwocomplexfrequency_domainanalyticalfunctionsiscalculate…  相似文献   

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