简介：有抑制使用橡胶磁性的粉末(DRM)的材料的一根伸臂横梁被调查了。二个方法被选择保持DRM到一根颤动的钢横梁，一个人是由粘合剂结合由磁性的吸引人的力量(叫的DRM横梁)和其它依附DRM(叫的AB-DRM横梁)。与引起由的AB-DRM横梁的抑制性质不同砍抑制材料的变丑，DRM横梁的抑制性质被滑动描绘和抑制材料的内部损失的摩擦损失。作者建立了明确的表达预言DRM横梁的抑制特征，它试验性地被验证。橡胶材料损失因素尾在抑制DRM横梁对AB-DRM横梁的改进上有明确的影响，这被发现。如果尾是比在0.8255附近的批评价值小的，振动振幅的一个有效范围总是在在哪个DRM，横梁能完成比AB-DRM横梁的更好的抑制存在；相反地，如果尾比批评价值大，当幻灯片发生时，有效范围不存在。如此的结果被用来决定DRM的优点和限制并且开发设计指南。

简介：一个古典抑制矩阵的性能，从起始的结构的性质或当前的结构的性质的使用的构造任何一个，在自由(MDOF)的非线性的多重度的一步一步的解决方案，系统是评估的经分解。分析结果被数字例子证实。因而，一些结论从可能为实际应用被认为指南同样不平的这些分析结果被得出。从起始的结构的性质构造的一个古典抑制矩阵为实际应用是足够的，这被发现，自从它近似有由当前的结构的性质获得了的一样的抑制效果并且以计算是更有效的。

简介：Thefirstorderdifferentialmatrixequationsofthehostshellandconstrainedlayerforasandwichrotationalshellarederivedbasedonthethinshelltheory.Employingthelayerwiseprincipleandfirstordersheardeformationtheory,onlyconsideringtheshearingdeformationoftheviscoelasticlayer,theintegratedfirstorderdifferentialmatrixequationofapassiveconstrainedlayerdampingrotationalshellisestablishedbycombiningwiththenormalequilibriumequationoftheviscoelasticlayer.Ahighlyprecisetransfermatrixmethodisdevelopedbyextendedhomogeneouscapacityprecisionintegrationtechnology.Thenumericalresultsshowthatpresentmethodisaccurateandeffective.

简介：绳的一个分离模型被开发并且过去常模仿在一端修理的绳的飞机运动。实际上，二个系统被介绍，其成员是僵硬却非理想的关节包含弹性或驱散。驱散被粘滞的抑制简单地反映当模特儿，而弯曲僵硬概念为横梁和简单几何公式基于古典弯曲弯曲的时刻关系。运动的方程被导出，他们的复杂性从计算观点被讨论。自从修改扩大向后的区别，现金的公式(MEBDF)被实现解决结果起始的价值问题，技术计划被构画出。数字实验弹性被执行并且影响并且在模型的行为上抑制被分析。基本精力原则被用来验证获得的结果。

简介：Itiswidelyknownthattheseismicresponsecharacteristicsofasoilsitedependsheavilyonseveralkeydynamicpropertiesofthesoilstratum,suchaspredominantfrequencyanddampingratio.Awidelyusedmethodforestimatingthepredominantfrequencyofasoilsitebyusingmicrotremorrecords,proposedbyNakamura,isinvestigatedtodetermineitseffectivenessinestimatingthedampingratio.TheauthorsconductedsomemicrotremormeasurementsofsoilsitesinHongKongandfoundthatNakamura'smethodmightalsobeusedtoestimatethedampingratioofasoilsite.DampingratiodatafromseveraltypicalsoilsiteswereobtainedfrombothNakamura'sratiocurvesusingthehalfpowerpointmethodandresonantcolumntests.Regressionanalysisindicatesthatthereisastrongcorrelationbetweenthedampingratiosderivedfromthesetwodifferentapproaches.

简介：TheregularsolutionsoftheisentropicEulerequationswithdegeneratelineardampingforaperfectgasarestudiedinthispaper.Andacriticaldegeneratelineardampingcoefficientisfound,suchthatifthedegeneratelineardampingcoefficientislargerthanitandthegasliesinacompactdomaininitially,thentheregularsolutionwillblowupinfinitetime;ifthedegeneratelineardampingcoefficientislessthanit,thenundersomehypothesesontheinitialdata,theregularsolutionexistsglobally.

简介：ThepaperdealswiththestronglydampednonlinearwaveequationofKirchhofftype.Theexistenceofaglobalattractorisprovenbyusingthedecomposition,andmoreover,thestructureoftheglobalattractorisestablished.Ourresultsimprovethepreviousresults.

简介：Usingthewavepackettheory,weobtainallthesolutionsoftheweaklydampednonlinearSchrodingerequation.Thesesolutionsarethestaticsolution,andsolutionsofplanarwave,solitarywave,shockwaveandellipticfunctionwaveandchaos.Thebifurcationphenomenonexistsinbothsteadyandnon-steadysolutions.Thechaoticandperiodicmotionscancoexistinacertainparametricspaceregion.

简介：Aprecisetangentialcontactdampingmodelisproposed,whichincludesthelateralcontactoftheupper-lowerasperitiesandtheinteractionofadjacentasperities.Theeffectsofthenormalstaticpreload,frequency,andamplitudeoftangentialdisplacementonthetangentialcontactdampingwereanalyzedbysimulation,respectively.Furthermore,theresultsofsimulationareverifiedbyexperiment.Thetangentialcontactdampingofconsideringtheinteractionandlateralcontactofasperityisveryclosetotheexperimentalresults.

简介：Thetensile-shearfailurezoneofthelaminateddampingsteelsheetwasinvestigatedbyscanningelectronmicroscopyandX-rayphotoelectronspectroscopy.Itisfoundthatthereexistscohesivefailureinpolymersandwichandsub-boundaryfailurebetweenthesteelsheetandthepolymer.Thesub-boundarylayerisdominantlypolymermaterial.Thetensile-shearfailureofthelaminateddampingsteelsheetisaprocessduringwhichthecrazesform,growupandmergeintocracks.

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简介：Inthispaper,weconsiderthepartialdifferentialequationofanelasticbeamwithstructuraldampingbyboundaryfeedbackcontrol.First,weprovethisclosedsystemiswell--posed;thenweestablishtbeexponentialstabilityforthiselasticsystembyusingatheoremwhichbelongstoF.L.Huang;finally,wediscussthedistributionandmultiplicityofthespectrumofthissystem.Theseresultsareveryimportantandusefulinpracticalapplications.

简介：Theseriescomposedbybeammodefunctionisusedtoapproximatethedisplacementfunctionofconstraineddampingoflaminatedcantileverplates,andthetransversedeformationoftheplateonwhichaconcentratedforceisactediscalculatedusingtheprincipleofvirtualwork.BysolvingLagrange'sequation,thefrequenciesandmodellossfactorsoffreevibrationoftheplateareobtained,thenthetransientresponseofconstraineddampingoflaminatedcantileverplateisobtained,whentheconcentratedforceiswithdrawnsuddenly.Thetheoreticalcalculationsarecomparedwiththeexperimentaldata,theresultsshow:boththefrequenciesandtheresponsetimeoftheoreticalcalculationanditsvariationallawwiththeparametersofthedampinglayerareidenticalwithexperimentalresults.Also,theresponsetimeofsteelcantileverplate,unconstraineddampingcantileverplateandconstraineddampingcantileverplatearebroughtintocomparison,whichshowsthattheconstraineddampingstructurecaneffectivelysuppressthevibration.

简介：<正>AnonlinearhingedextensibleelasticbodyequationwithstrongstructuraldampingandBalakrishnan-Taylordampingoffullexponentisstudiedasageneralmodelforlargespacestructuresofhigherdimensions.Inthispaper,theabsorbingsetsandfiatinertialmanifoldareobtainedforthisnonlinearbodyequation.Thecontrolspilloverproblemassociatedwiththestabilizationofthisequationisresolvedbyconstructingalinearfinitedimensionalfeedbackcontrolbasedontheexistenceofinertialmanifoldsoftheuncontrolledequation.Moreover,theresultsobtainedarerobustwithrespecttotheuncertaintyinstructuralparameters.

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简介：Theinfluenceofthevolumefractionoftemperedmartensiteonmagnetomechanicaldampingoftheferriticmatrixindual-phasealloyswasstudied.Theexperimentalresultsshowedthat（1）dual-phasedampingalloyisofgoodcombinationofstrengthandtoughness:（2）gooddampingca-pacity(Q-1≥5.0×10-3)canbeobtainedindual-phasealloysonlywhenthevolumefractionoftemperedmartensitewascontrolledproperly.Theeffectofmartensiteonmagnetomechanicaldamp-ingoftheferriticmatrixwasanalysed.Thedampingcapacityofdual-phasealloyswasrelatedtothevolumefractionVmoftemperedmartensitebyQ^{-1=Q-1（1-Vm/1+BVm）atsmallvibrationstrainamplitudesεA≤5.0×10-6.}

简介：Asisalreadyknown,mostoftheplasmaliteratureisoccupiedwiththeplasmainstabilitiesandtheinevitableplasmawaves,whichremainmajorobstaclestothethermonuclearfusionprocess.Manyexperimentaldataontheplasmawaves(growthordamping)andtheiraccompaniedtheoreticalinterpretationshavebeenpublishedduringthelastfivedecades;lotsofthemhavebeenidentifiedandjustifiedaswell,somenotyet.Oneoftheseisourpreviousresearchonplasmawaves,whichoriginatedintheearly80'satthePlasmaPhysicsLaboratoryoftheNCSR'Demokritos'.Asthewaverisingisdefinedbythegrowthrate(orthedampingontheextinguishment),theseimportantwavyquantitieswillbestudiedindetailinthepresentpaper.Threeexamplesaretakenfromourprevioustheoreticalresults,andthefirstobservationrevealsthattheinvolvedquantitiesarecomplicatedenoughtobestudiedbythemselves.So,theuseofsuitableapproachmodels,whichmayinterprettheexperimentalwavyquantities,isthecentralideaofthepresentattempt.Furthermore,calculationswithalittlechangeoftheinitialconditionshavebeenrepeatedinordertodeterminewhethertheplasmabehavesasachaoticmedium.

简介：A为称为“变弱并且抑制的技术”的存在大楼翻新过程(结合)在这篇论文被介绍。结构变弱能在严重地面运动期间限制最大的反应加速，但是在排水量或内部故事的飘移导致增加。由使用抑制增加粘滞在另一方面，水坝pers减少内部故事的飘移并且没在全部的加速上有重要效果，结构什么时候有弹性地表现在。变弱并且抑制的技术在结构为结构、非结构的损坏探讨二个主要原因。变弱翻新对结构特别地合适在强调部件和弱易碎的部件上。在这篇论文，WeD的优点被非线性的动态分析验证并且简化光谱被修改了到的途径与另外的抑制适合结构设备。在加利福尼亚位于圣Fernando山谷的医院结构作为案例研究被选择。从两分析的结果证明retrofit溶液是可行的减少结构的加速和排水量。敏感分析也被执行通过脆弱分析在加速和排水量用表演阀值的不同联合评估翻新的方法的有效性。

简介：Thequasilinearhyperbolicequationwithnonlineardampingisconsideredinthispaper,anewasymptoticprofileforthesolutiontotheequationisobtainedbysuitablychoosingtheinitialdataofthecorrespondingparabolicequation,theconvergenceratesofthenewprofilearebetterthanthatobtainedbyNishihara(1997,J.DifferentialEquations137,384-395)andH.-J.Zhao(2000,J.DifferentialEquations167,467-494).

简介：这份报纸为最佳的设计论述一条途径一新翻新叫的技术削弱并且抑制那为土木工程是有效的无弹性的结构。其他的设计方法论关于能决定地点和结构的元素变弱或弄软并且增加的大小当保险结构的稳定性时，抑制的存在的被开发。是处于非线性的状态的多项式的求和的一个最佳的多项式控制器在阶段1方法被使用减少山峰反应数量地震地激动非线性或hysteretic系统。最佳的多项式控制器的主要优点是它能自动地稳定结构的系统。砍类型结构的最佳的设计被用作一个例子说明建议途径的可行性，它导致减小两个都达到顶点内部故事的飘移和山峰总数加速。