简介：Inthispaper,theaddedmassofplatesandbeamstiffenedplatesvibratinginwateraresummarizedforthepurposeofconvenienceinengineeringdesign.Theanalyticalformulae,calculateddatatables,calculatedcurvesandsomeexperimentalresultsarepresented.

简介：Thealmostsurestabilityofhomogeneousviscoelasticplatessubjectedtoarandomwide-bandstationaryin-planeloadisinvestigated.TheviscoelasticbehavioroftheplateisdescribedintermsoftheBo-ltzmannsuperpositionprinciple,therelaxationkernelsofwhicharerepresentedbythesumsofexponents.Ontheassumptionthatthein-planeloadisrandomwide-bandstationaryprocess,sufficientconditionsforal-mostsurestabilityofviscoelasticplatesareobtainedbytheapplicationsofLyapunov’sdirectmethod.

简介：我们在某些合理假设下面考虑有弹性的薄盘子的颤动。我们由哈密尔顿原则为这个模型导出非线性的方程。在为起始的数据的hyperbolicity上的条件下面，我们建立本地时间well-posedness为起始并且由Picard重复的边界值问题为解决方案策划，并且获得估计。

简介：ＡＮＡＬＹＳＩＳＯＦＳＴＡＢＩＬＩＴＹＯＮＥＬＡＳＴＩＣＰＬＡＴＥＳＷＩＴＨＩＮＩＴＩＡＬＩＭＰＥＲＦＥＣＴＩＯＮＳＸｕＫａｉｙｕ（徐凯宇）（ＲｅｃｅｉｖｅｄＯｃｔ．５．１９９４；ＣｏｍｍｕｎｉｃａｔｅｄＰａｉＬｉｚｈｏｕ）ＡＮＡＬＹＳＩＳＯＦＳＴＡ...

简介：Thetemperaturedistributionofsteelplatesisaffectedbyheatingratesandheatingcurvesintheprocessofinductionheating.Themagneticfluxdensityinsidetheinductionfurnacewasmeasured,thedistributionofmagneticfluxdensitywasanalyzedandtheuniformareaoftheinductionheatingtemperaturedistributionwasascertained.Thelocationsformeasuringtemperatureweresetandthetemperatureindifferentprocesseswasmeasured.Theinfluenceofheatingratesandheatingcurvesonthetemperature...

简介：Inthepresentpaper,afour-stageperforationmodelthataccuratelypredictstheresidualvelocityisdevelopedbyadoptinganenergymethod.Thefourstagesareplugformation,dishingformation,petalformationandprojectileexit.Inaddition,someimportantexperimentalresultsarepresentedandanalyzedtovalidatethepresentperforationmodel.Intheexperiments,highspeedcamerasystemisusedtorecordtheperforationprocess.Observationsontargetdamageandmeasurementsofinitialvelocitiesandresidualvelocitieswiththeaidofthesystemarepresented.Numericalsimulationsarecarriedoutforprojectilesagainstsingleandlayeredplatesadoptedintheexperiments.Theperforationprocessisstudiedandthedeformationandfailuremodesareobtained.Thepredictionsofnumericalsimulationsandanalyticalmodelarefoundinreasonablygoodagreementwiththoseofexperiments,andcanbeusedtopredicttheballisticlimitandresidualvelocityofstiffenedplatesperforatedbyrigidprojectiles.

简介：这篇文章处理为特别变丑的薄2D板根据Fl建模的矩形的粘弹性的orthotropic的短暂颤动的答案

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简介：ThefundamentalsolutionsoftheorthotropicthickplatestakingintoaccountthetransversesheardeformationarederivedbymeansofHrmander’soperatormethodandaplane-wavedecompositionoftheDiracδ-functioninthispapey.Theboundaryintegralequationsofthethickplateshavebeenformulatedwhichareadaptedtoarbitraryboundaryconditionsandplaneforms.Thenumericalcalculationofthefundamentalsolutionsisdiscussedindetail.SomenumericalexamplesareanalyzedwithBEM.

简介：Onthebasisoftheprincipleofdielesshydrobulgingtechnology,anovelhydrobulgingtechnologyformanufacturinghyperbolicplatesisproposed.First,atoroidalpipeelboworapartialtoroidalpipeelbowisformed,thenthesinglehydrobulgedstructurecanbecutupintosomedesiredplates.Itisprovedbyexperimentsandfiniteelementsimulationthatmanufacturingtechnologyofhyperbolicplatesadoptingintegratedhydrobulgingformingtechnologyisfeasible.

简介：ApplyingLagrange–Germain'stheoryofelasticthinplatesandHamiltonianformulation,thedynamicsofcantileverplatesandtheproblemofitsvibrationcontrolarestudied,andageneralsolutionisfinallygiven.BasedonHamiltonianandLagrangiandensityfunction,wecanobtaintheflexuralwaveequationoftheplateandtherelationshipbetweenthetransverseandthelongitudinaleigenvalues.Basedoneigenfunctionexpansion,dispersionequationsofpropagationmodeofcantileverplatesarededuced.Bysatisfyingtheboundaryconditionsofcantileverplates,thenaturalfrequenciesofthecantileverplatestructurecanbegiven.Then,analyticsolutionoftheprobleminplatestructureisobtained.Anhybridwave/modecontrolapproach,whichisbasedonbothindependentmodalspacecontrolandwavecontrolmethods,isdescribedandadoptedtoanalyzetheactivevibrationcontrolofcantileverplates.Thelow-order(controlledbymodalcontrol)andthehigh-order(controlledbywavecontrol)frequencyresponseofplatesarebothimproved.Thecontrolspilloverisavoidedandtherobustnessofthesystemisalsoimproved.Finally,simulationresultsareanalyzedanddiscussed.

简介：Apracticalmethodforcomputingtheone-wayrectangularorthotropicplate(isotropicplateasaspecialcase)issuggestedinthispaper.Thesupportedcondi-tionsintwooppositeedgesmaybesimplysupported,continuousorsupportednonsymmetricallyandtheothertwooppositeedgesareslide-supportedorfree.Aseriesofsimplifiedformulasaregivenforcalculatingthebendingmomentsalongthecrosssection(loadedsection),inwhichtheactingpointoftheconcentratedloadorthecenterofarec-tangularuniformloadislocated.Thevalidrangeandaccuracyoftheseformulaswerestud-iedandtheapproximateresultswereexaminedandcomparedextensivelywiththosebythetriangularseriessolutionorfiniteelementmethod.

简介：AnalyzedandstudiedthecharactersofhighstrengthlowalloysteelwhichcontainMo,Cr,NbandNi.etc.Followingactualrolling,combiningthefeatureofrollingmode,andexploitingtheequipmentadvantageof5mHeavyPlateMill,optimizedthematerialdesign,heatingtemperatureandrollingmethod,stabilizedrollingprocessofthinalloyedsteel,thequalityindexwasadvanced.

简介：Two-dimensional(2D)equationsformultiferroic(MF)laminatedplateswithimperfectinterfacesareestablishedinthispaper.Theinterfacebetweentwoadjacentsublayers,whicharenotperfectlybondedtogether,ismodeledasageneralspring-typelayer.Themechanicaldisplacements,andtheelectricandmagneticpotentialsofthetwoadjacentlayersareassumedtobediscontinuousattheinterface.Asanexample,theinfluencesofimperfectinterfacesonthemagnetoelectric(ME)couplingeffectsinanMFsandwichplateareinvestigatedwiththeestablished2Dgoverningequations.NumericalresultsshowthattheimperfectinterfaceshaveasignificantimpactontheMEcouplingeffectsinMFlaminatedstructures.

简介：Inthispaper,fundamentalequationsandboundaryconditionsofthenonlinearbendingtheoryforarectangularsandwiclplatewithasoftcorearederivedbymeansofthemethodofcalculusofvariations.Thenthenonlinearbendingforasimplysupportedrectangularsandwichplateundertheuniformlateralloadisinvestigatedbyuseoftheperturbationmethodandaquiteaccurateanalyticsolutionisobtained.

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简介：Ahighlysensitivephotodeflectionspectroscopytechniquewithfemtosecondtimeresolutionhasbeendeveloped.Usingthistechnique,wehavemeasuredaccuratelytheshapeofacousticpulses,whichweregeneratedfromtheultrafastphononemissioninagermaniumplate.Supersonicexpansionofphotoexcitedelectron-holeplasmawasobserved.Thecharacteristicvelocityofplasmadiffusionwasevaluated.Itexceededthelongitudinalsoundvelocityingermaniumbyafactorof4.0.

简介：Thepolarizationevolutionofvectorbeams(VBs)generatedbyq-platesisinvestigatedtheoreticallyandexperimentally.AnanalyticalmodelisdevelopedfortheVBcreatedbyageneralquarter-waveq-platebasedonvectordiffractiontheory.ItisfoundthatthepolarizationdistributionofVBsvarieswithpositionandthevalueq.Inparticular,fortheincidenceofcircularpolarization,theexitvectorvortexbeamhaspolarizationstatesthatcoverthewholesurfaceofthePoincarésphere,therebyconstitutingafullPoincarébeam.Fortheincidenceoflinearpolarization,theVBisnotcylindricalbutspecularlysymmetric,andexhibitsanazimuthalspinsplitting.Theseresultsareinsharpcontrastwiththosederivedbythecommonlyusedmodel,i.e.,regardingtheincidentlightasaplanewave.Byimplementingq-plateswithdielectricmetasurfaces,furtherexperimentsvalidatethetheoreticalresults.

简介：采用1/4波浪板为阶段延迟和波浪板的眼的轴的同时的测量使用的一个简单方法被表明。测量原则的理论分析详细被介绍。在测量，在调整标准1/4以后，挥动板并且快(慢)要测量的板的轴平行到polarizer的通行证轴，要测量的板被450counterclockwisly旋转。一台步进马达被用来旋转分析器。试验性的数据被一个光电探测器收集然后送到一台计算机。根据产量数据曲线，阶段延迟和要测量的板的眼的轴能同时被获得。为了测试方法，位/2和位的可行性，/8波浪盘子被用作例子表明测量过程。阶段延迟测量精确性比0.5脳好10?2。这个方法能被用来方便地测量任意的阶段延迟。CLC数字O436.3

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