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91.
IntroductionTheporousmediamodelsdeducedfrommixturetheoryareattractingattentionofmoreandmoreresearchersbecauseitisbasedontheframeofcontinuummechanics[1]andweresuccessfullyusedtodepictthemechanicalbehaviorsofsoilsandbiologicalsofttissues[2 ,3].Withthistypeo… 相似文献
92.
IntroductionConsiderthelinearsystemofthemeasurementfeedbackcontrol x=Ax Bw B2 u , ( 1 )y =Cx v ,( 2 )wherexisthen_dimensionalstatevector,yisaq_vectorofmeasurements,uisanm_vectorofcontrolinputs,wandvarel_vector,q_vectorofwhite_noiseprocesswithknownstatisticalprope… 相似文献
93.
Based on the (Ⅰ) of the present work, the behavior of shear beam model at crack initiation stage and at instable propagation stage was studied. The prime results include: 1) discriminant equation which clarifies the mode of instability, snap-back or snap-through, was established; 2) analytical solution was given out for the double shear beam and the load-displacement diagram for monotonic loading was presented for a full process; and 3) the problem of the energy release induced by instability was discussed. 相似文献
94.
Zhang Jianwu Professor Doctor Humboldt Research Fellow Li Qi Shu Yongping 《应用数学和力学(英文版)》2000,21(5):529-536
A new refined first-order shear-deformation plate theory of the Kármán type is presented for engineering applications and
a new version of the generalized Kármán large deflection equations with deflection and stress functions as two unknown variables
is formulated for nonlinear analysis of shear-deformable plates of composite material and construction, based on the Mindlin/Reissner
theory. In this refined plate theory two rotations that are constrained out in the formulation are imposed upon overall displacements
of the plates in an implicit role. Linear and nonlinear investigations may be made by the engineering theory to a class of
shear-deformation plates such as moderately thick composite plates, orthotropic sandwich plates, densely stiffened plates,
and laminated shear-deformable plates. Reduced forms of the generalized Kármán equations are derived consequently, which are
found identical to those existe in the literature.
Foundation item: the National Natural Science Foundation of China (59675027)
Biography: Zhang Jianwu (1954-) 相似文献
95.
IntroductionAnelastomer(compressibleorincompressible)betweentwoparallelrigidsurfacesisakindofoftenworkinengineeringandtechnology.Thestudyforitsdeformationundertheroleofforcebeganmanyyearsago.Targetstudied—bondedelasticbodyisdividedintoacircularcylindri… 相似文献
96.
IntroductionSofar,onlyafewpeoplehavestudiedthelargedeflectionproblemsofsandwichplatesandshellsbecauseofthedifficultyofnonlinearmathematics.LiuRenhuaihasdonemuchtofindaseriesofresultswiththevalueofapplicationinengineeringpractice[1~5].Author[6,7]hadtheiniti… 相似文献
97.
Thestudyofconservationlawsofdynamicalsystemisasignificantaspectofmodernanalyticalmechanics.In1918,usingtheinvarianceofHamiltonactionundertheinfinitesimaltransformations,Noether[1]studiedconservationlawsofmechanicalsystemandpresentedthefamousNoether’stheor… 相似文献
98.
IntroductionParticulateflowsarecommonlyencounteredinvariousnaturalphenomenaandindustrialprocesses,suchasinthechemicalandpetroleumindustries,thesedimentationofparticlesisawayofseparatingparticlesfromfluid ,aswellasawayofseparatingparticleswithdifferentsettlingspeedsfromeachother[1].Animportantaspectoftheseflowsisparticlepairinteraction ,whichisfundamentalmechanismsthatenterstronglyintoallpracticalapplicationsofparticulateflows.Problemofthesedimentationoftwoequalparticleshasbeenpreviouslystudied… 相似文献
99.
Dr. T. Irie Professor G. Yamada Associate Professor I. Takahashi 《Archive of Applied Mechanics (Ingenieur Archiv)》1980,49(1):41-49
Summary The steady state in-plane response of a curved Timoshenko beam with internal damping to a sinusoidally varying point force or moment is determined by use of the transfer matrix approach. The method is applied to free-clamped non-uniform beams with circular, elliptical, catenary or parabolical neutral axis excited at the free end; the driving point impedance and force or moment transmissibility are calculated numerically and the influence of the varying cross-section and of the function expressing the neutral axis are studied.
Übersicht Es werden ebene, stationäre Schwingungen eines gekrümmten Timoshenko-Balkens mit innerer Dämpfung, durch harmonische Punkt-Kräfte oder Punkt-Momente erregt, mit Hilfe von Übertragungsmatrizen berechnet. Diese Methode wird auf einseitig fest eingespannte, ungleichförmige Balken angewendet, deren neutrale Achse verschiedene Formen (Kreisbogen, Ellipsenbogen, Kettenlinie, Parabel) besitzt. Für den am freien Ende erregten Balken werden Erreger-Impedanz und Durchlässigkeit für Kraft und Moment ausgerechnet; die Einflüsse des veränderlichen Querschnittes und der Form der neutralen Linie werden diskutiert.相似文献
100.