学科分类
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8 个结果
  • 简介:建设有中国特色社会主义,制度的现代化刻不容缓.制度建设是个系统工程,一个良好的制度应该成为社会制度系统的有机组成部分,它和系统处于功能耦合状态.一个单位如果不顾社会制度系统的耦合需要,各自为政,制度失调,那么,不管经济效益如何,该单位的整体效益是十分有限的.研究制度的功能耦合,有助于单位主体有机地融入社会发展的轨道,实现可持续发展.

  • 标签: 中国 社会制度 制度建设 功能耦合 功能变异 制度文明
  • 简介:水动力学与固体力学交叉的流固耦合理论是船舶与海洋工程结构响应分析与直接设计的重要工具.本文应用卷变积方法,按照广义力和广义位移之间的对应关系,将弹性动力学的基本方程卷乘上相应的虚量,然后积分,代数相加,并考虑到体积力和面积力均为伴生力,建立了非保守系统初值问题的两类变量的广义拟余能原理.应用广义拟余能原理研究流固耦合问题,分析了结构的动力响应,给出同时求解力类量和位移类量两类变量的计算方法。

  • 标签: 流固耦合 弹性动力学 广义拟余能原理 动力响应
  • 简介:设计了一种新型基于余压能驱动的磁力耦合泵设计方案,进行了理论分析和设计计算,开发了一种新型的基于余压能驱动的磁力耦合泵装置,实现了两种流体的能量转化过程中的零泄漏;理论分析和设计计算结果表明:在同一排水量条件下,装置升给水的压头随着给水流量的而减小,轴流叶轮的转速随着排水管直径的增加逐渐减小;在相同时给水流量情况下,随着排水量的增加,叶轮转速随之增加,当可用排水量增加时,给水获得的压头增加.

  • 标签: 磁力輕合泵 余压能 压头 流量
  • 简介:Sloshingphenomenonintheliquidcargocarriershascaughttheattentionofresearchersastheinteractionbetweenthesloshingwavesandstructureisoneofthekeypointanddifficultyinthestudyofsloshing.Inthispaper,wecapturedthefreesurfacewithavolumeoffluid(VOF)methodandthencalculatedthemotionsandresponsesofthestructurebyadoptingtheReynolds-averagedNavier-Stokes(RANS)equationsforthewholefluiddomain.Withtheuseofuserdefinedfunctions(UDF)inFluent,theinteractionbetweenfluidandstructurewasthensimulated.Asareasonablesimplification,theauthorsstudiedtheresponseofasinglecantileverinatankundersloshingloads;Furtherstudyshouldpaymoreattentiontothemechanismsofinteractionbetweensloshingwavesandelasticstructures.

  • 标签: LIQUID SLOSHING FLUENT DEFORMATION NUMERICAL simulation
  • 简介:Thispaperpresentsanimprovedunstructuredgridimmersedboundarymethod.Theadvantagesofbothimmersedboundarymethodandbodyfittedgridswhicharegeneratedbyunstructuredgridtechnologyareusedtoenhancethecomputationefficiencyoffluidstructureinteractionincomplexdomain.TheNavier-StokesequationwasdiscretizedspaciallywithcollocatedfinitevolumemethodandEulerimplicitmethodintimedomain.TherigidbodymotionwassimulatedbyimmersedboundarymethodinwhichthefluidandrigidbodyinterfaceinteractionwasdealtwithVOS(volumeofsolid)method.AnewVOScalculationmethodbasedongraphwaspresentedinwhichbothimmersedboundarypointsandcrosspointswerecollectedinarbitraryordertoformagraph.Themethodisverifiedwithflowpastoscillatingcylinder.

  • 标签: fluid structure interaction immersed boundary METHOD
  • 简介:Ananalyticalstudywaspresentedonactivecontrolofsoundtransmissionintoavibro-acousticenclosurecomprisingtwoflexibleplates.Twotypesofactuatorswereused,i.e.acousticactuatoranddistributedleadzirconatetitanatepiezoelectric(PZT)actuatorinsteadofpointforceactuator.Usingthemodalacoustictransferimpedance-mobilitymatrices,theexcitationandinteractioninthecoupledsoundtransmissionsystemcanbedescribedwithclearphysicalsignificance.Withthecontrolsystemdesignedtogloballyreducethesoundfield,differentcontrolsystemconfigurationswereconsidered,includingthestructuralactuatorontheincidentplate,actuatoronthereceivingplate,acousticactuatoronthecavity,andtheircombinations.Theeffectivenessandperformanceofthecontrolstrategycorrespondingtoeachsystemconfigurationwerecomparedanddiscussed.Theroleandcontrolmechanismofeachtypeofactuatorwereofparticularinterest.Itwasshownthattheincidentplateactuatoriseffectiveincontrollingthecavity-dominatedmodesandthestructuralmodesdominatedbytheincidentplateandreceivingplate.Twomaincontrolmechanismsareinvolvedinthiscontrolconfiguration,i.e.,modalsuppressingandmodalrearrangement.Forcontrolsystemconfigurationwithonlyacousticactuatorintheenclosure,themechanisminvolvedinthisarrangementispurelymodalsuppression.Desirableplacementsofstructuralactuatorsintermsoftotalpotentialenergyreductionwerealsodiscussed.

  • 标签: sound transmission active CONTROL CONTROL mechanism
  • 简介:在高素质技能型人才培养中,辅导员的主体地位和作用不容忽视。由于辅导员的职业精神与工匠精神存有诸多交集,因此,在人才培养工作中,辅导员要以工匠精神和辅导员职业精神的耦合为契合点,充分发挥敬业、尚德、求精和创新的精神,以求同存异、兼容并蓄的"大匠"之气度,以乐此不疲、心怀虔诚的"导员"之情怀,以提高学生们的整体思想水平、政治觉悟、道德品质和文化素养为目标,努力将学生培养成德才兼备、全面发展的高技能型人才。

  • 标签: 工匠精神 辅导员 职业精神