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变速运动颗粒所受非恒定作用力分析 总被引:5,自引:0,他引:5
本文利用典型函数试验法对变速运动颗粒所受非恒定作用力(Basset力和附加质量力)进行了深入分析和比较,结果表明:Basset力对重质颗粒运动的影响很大,不能忽略;对于轻质颗粒,则以附加质量力的作用为主,Basset力可忽略不计. 相似文献
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IntroductionGasatomizationisaprocessinwhichthehigh_velocitygasstreamimpingesonthemoltenmetaljetandbreaksitupintodroplets.Beingabasicprocess,gasatomizationiswidelyused,includingpowdermetallurgy,sprayforming,etc..Castleman[1]postulatedthatatomizationis… 相似文献
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1 BasicDefinitionsandNotationsWeonlydealwithfiniteundirectedsimplegraphs.LetGbeagraphwithvertexsetV(G)andedgesetE(G) .Foreachx∈V(G) ,wedenotethedegreeofxinGbydG(x) .Letg ,fbetwointeger_valuedfunctionsdefinedonV(G)suchthatg(x)≤f(x)forallx∈V(G) .A (g ,f)_factorofGisas… 相似文献
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Coexisting periodic orbits in vibro-impacting dynamical systems 总被引:1,自引:0,他引:1
IntroductionItisacommonphenomenonthatavarietyofattractivesetscoexistinsmoothnonlineardynamicalsystems.Insomefamousmodels,forexample ,inDuffing’sequationandVanderPol’sequation ,ithasbeenfoundthat,etc.therecoexistseveralattractivesetsbymeansofanalyticmetho… 相似文献
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IntroductionComputinganalysisfortheproblemsofthethree_dimensionalsolid ,eachtypeofplatesandshellsetc .,numericalalgorithmincommonusehasfinitedifferencemethod ,finiteelementmethod ,weightedresidualsmethodandBEMetc.Owingtocomplexityofthethree_dimensionalpro… 相似文献
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IntroductionGasatomizationisaprocesthatthehigh_velocitygasimpingesonthemoltenmetalstreamandbreaksitupintodroplets.Beingabasic... 相似文献
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IntroductionAnonlineardynamicalsystemmayexhibitcomplexdynamicbehaviorinthevicinityofacompoundcriticalpoint[1].AccordingtothestructureoftheJacobianevaluatedatthecriticalpoint,thesystemsmaybeclassified,ingeneral,asco_dimensionone,co_dimensiontwo,etc.[2].Wheno… 相似文献
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IntroductionLetΓ0 beasmoothconnectedhypersurfaceanditistheboundaryofaboundedopensetU Rn.Supposethatt0 isatime ,M =M(x) ∈C3withM( 0 ) =0 ,M′(x) >0 ,andl1,l2 ,… ,lnarepositiverealnumbers.{Γt} 0 ≤t≤t0 isaclassicalsmoothsurface,anditistheboundaryofaboundedopensetUt,whichisdiff… 相似文献
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从分析气体分子的悬浮和静水中Brown微粒的悬浮之机理出发,论述了重力场中粒子(分子、微粒等)的悬浮不一定需要其它外力,粒子本身的任何形式的无规则运动,达到一定强度后都能使粒子弥散悬浮.河流中的泥沙颗粒和气(水)力输送管道中的颗粒的悬浮也主要靠颗粒物的无规则运动.作用于颗粒的升力和其它力可改变颗粒悬浮沿高度的分布,但仅用这些力(若无任何无规则运动)无法解释颗粒的弥散悬浮状态.讨论了颗粒对流动阻力的双重作用:支持颗粒悬浮的湍流脉动因引入颗粒而削弱,这是颗粒的减阻作用;颗粒增阻的一个主要机制是,流体给予颗粒的水平动量在颗粒一壁面碰撞中不断地损失.用悬浮动概念解释颗粒引起的增阻是不正确的. 相似文献
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SOME PROBLEMS IN THE Z-C-X SPACE 总被引:2,自引:0,他引:2
朱传喜 《应用数学和力学(英文版)》2002,23(8)
IntroductionThispaperisacontinuationofRef.[1 ]bytheauthor,itisoneofthemaincontentsaboutinvestigatingrandomsolutionsofrandomoperatorequations.Throughoutthispaperlet(E ,B)beameasurablespace ,whereEisaseparablerealBanachspace ,Bdenotestheσ_algebraofgeneratingb… 相似文献
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Study on Exact Analytical Solutions for Two Systems of Nonlinear Evolution Equations 总被引:1,自引:0,他引:1
IntroductionDuringthecourseofstudyingthewaterwave,manycompletelyintegrablemodelswereobtained ,suchasKdVequation ,mKdVequation ,(2 1 )_dimensionalKPequation ,coupledKdVequations,variantBoussinesqequations ,WKBequationsetc .[1- 13 ].Inordertofindexpliticexactsolutio… 相似文献
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ATHREE-FLUIDMODELOFTHESAND-DRIVENFLOW¥(刘大有,董飞)LiuDayou;DongFei(InstituteofMechanics,AcademiaSinica,Beijing100080,P.R.China)Abs... 相似文献
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IntroductionDuringthemid_1 980’s,atomographicimagingtechniquesuitedtoindustrialprocessdetection ,ProcessTomography[1],wasrapidlydevelopedintheUK ,USA ,etc .withsuccessfulapplicationsofCTtechniquetomedicaldiagnosis .Inparticular,asanewmemberwithinthefamilyofthe… 相似文献
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黄民海 《应用数学和力学(英文版)》1999,20(7):812-818
IntroductionUptonow,therehavebenmanyresearchesontheplaneweldingproblemofisotropicmaterials.e.g.[1]and[2]etc.However,forthepla... 相似文献
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1IntroductionandPreliminariesIn1968,Browder[1]provedthefollowingtheorem.Theorem11(Browder[1]) LetEbeaHausdorfftopologicallinearspace,XacompactconvexsubsetofEandF:X→2Xamappingsatisfyingthefollowingconditions:ⅰ)Foranyx∈X,F(x)isnonemptyandconvex;ⅱ)Fora… 相似文献
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云天铨 《应用数学和力学(英文版)》2001,(1)
1 MeaningandMethodsofStudyingofFinancialDerivativesFinancialderivativesarethosefinancialproductswhicharederivedfrombasicasserts (orunderlyinginstrucments) (e .g .stock ,bond ,currency ,interestrate,etc.)oftraditionalmarkets(e.g .stockmarket,bond’smarket,currency… 相似文献
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刘振海 《应用数学和力学(英文版)》2000,21(9):1045-1052
IntroductionLetΩbeanopenboundeddomainofRN,Q=Ω× (0 ,T) ,0 <T<∞ ,2 ≤p<∞ ,(1 /p) (1 /p′) =1 .Forconvenience ,wesetV =W1,p0 (Ω) ,V′=W- 1,p′(Ω)inthesequel.ThenVisarealreflexiveBanachspacedenselyandcompactlyimbeddedintoLp(Ω) .ThenormofanyBanachspaceBisdenotedby‖·‖B.ThepairingbetweenBan… 相似文献
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IntroductionLet(E,|·|)bearealBanachspacewithapartialorderintroducedbyaregularconeKofE.Inthispaper,theexistenceofsolutionsofthefollowingperiodicboundaryvalueproblems(PBVP)willbeinvestigated: (Ⅰ)u″=f(t,u,Tu) a.e.t∈J,u(0)=u(a),u′(0)=u′(a),wheref∈C(J×E×E,E),J=[0,a](a>0),and(T… 相似文献
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《应用数学和力学(英文版)》2001,(12)
BBAIZhan_bing (白占兵 )ExistenceandMultiplicityofPositiveSolutionsforaFourth_Orderp_LaplaceEquations 1 2 ( 1 476)………………………………………………………………………BAOWen_bo (鲍文博 )SeeXUYu_xiu (徐玉秀 ) 5( 586)…………………………………AmitabhBanerjeeandThakurBalwantSinghAFixedPointTheoremforSet_ValuedMapping… 相似文献