简介:By"concealedexplosionofmagma",wemeantheexplosiveproessofmagmaundersubterraneanconcealedconditionswhichisessen-tiallysimilartovolcaniceruptionseenatthesurface;theonlydiffer-"nceisthatthelattertakesplaceinanopenenvironmentatthesurface’`vhiletheformertinasemi-openenvironmentbelowathincovernearlhesurfac
简介:Thecharacterofthemagmaticrocksandoredeposits,formed-in’theregionsoftectonicmagmaticactivity(TMA)or"Diwa"dcpendsincertaindegreeonthebasementstructuretypes,andpartiallyonproportionsbetwccn"basalt~andgranitc-sedimentarylaycrthickncsses.Magma-andore-formationinTMA-structurcswcreconncctcdwithpowcrfulhcat
简介:TheEastTianshanisaremoteGobiarealocatedineasternXinjiang,northwesternChina.Inthepastseveralyears,anumberofgold,porphyrycopper,andFe(-Cu)andCu-Ag-Pb-Znskarndepositshavebeendiscoveredthereandareattractingexplorationinterest.TheEastTianshanislocatedbetweentheJunggarblocktothenorthandearlyPaleozoicterranesoftheMiddleTianshantothesouth.ItispartofaHercynianorogenwiththreedistinctE-W-trendingtectonicbelts:theDevonian-EarlyCarboniferousTousuquan-DananhuislandarconthenorthandtheCarboniferousAqishan-Yamansuriftbasintothesouth,whichareseparatedbyrocksoftheKanggurtagshearzone.Theporphyrydeposits,datedat322Ma,arerelatedtothelateevolutionarystagesofasubduction-relatedoceanicorcontinentalmarginarc.Incontrast,theskarn,gold,andmagmaticNi-Cudepositsareassociatedwithpost-colli-sionaltectonicsatca.290-270Ma.TheseLateCarboniferous-EarlyPermiandepositsareassociatedwithlarge-scaleemplacementanderuptionofmagmaspossiblycausedbylithospheredelaminationandriftingwithintheEastTianshan.
简介:一台新、创新的基础隔离设备基于作者和他们的同事执行的广泛的研究在这篇论文被介绍。设备的一个原型在摇晃的桌子上被造并且试验性地测试了。新基础隔离设备由二个磁盘,有三水平伸臂支撑的上面的增大的一垂直柱体,和记忆合金(SMA)锁的至少三使倾向的形状组成。SMA酒吧的角色是限制在底和上层建筑之间的相对动议,到由他们的超级橡皮的组成的法律并且到保证浪费体力设备重新集中。验证期望的表演,一个原型在正弦曲线下面被造并且测试与不同振幅增加频率的排水量的波浪。建议基础隔离设备的主要特征是为周期的装载,合金的超级橡皮的行为导致宽负担排水量环,这被显示出,在大量体力被浪费的地方。
简介:Inthisstudy,theseismicresponsecontrolofoffshoreplatformstructureswithShapeMemoryAlloy(SMA)dampersisinvestigated.AnewSMAdamperanditsrestoringforcemodelareintroducedforthecalculationofseismicresponsereduction.Basedonanactualplatformstructureanditsmechanicalmodel,theparameterswhichmayaffecttherateofshockabsorptionareanalyzed,suchasthenumber,positionandcharacteristicsoftheSMAdampersandtheconditionofthesitewheretheplatformislocated.TheresultsshowthattheSMAdamperisaneffectivecontroldeviceforoffshoreplatformsandsatisfactorycontrolcanbeachievedbyproperselectionoftheparameters.
简介:在决定与形状记忆合金(SMA)使用结构的隔离的有效性考虑的关键点是组成的模型,SMA隔离设备和分析方法。在这份报纸,一个简化组成的模型基于粘性的经典理论被建议模仿SMA,马氏体体积部分在被看作州的变量之一的superelasticity的行为。在模拟结果和试验性的结果之间的比较被做并且显示建议组成的模型产出在对试验性的好同意的压力紧张曲线。因此,建议模型能正确地模仿收益机制和SMA的精力驱散能力。下次,以便充分利用SMA的superelasticity,由pre-tensionedSMA酒吧组成的新SMA隔离乾被介绍。然后,一个有限元素分析模型被建立根据它的配置模仿SMA隔离乾的行为并且简化了组成的模型。最后,为与SMA隔离乾安装的长跨度的结构的一个简化设计方法被建议,它进一步被用来调查空间格子结构的隔离效果。结果证明SMA隔离乾能有效地减少结构的地震回答,它显示建议SMA隔离方法的有效性。