简介:Inthispaper,addedresistancesactingonahullofnonballastwatership(NBS)inhighwavesisdiscussed.ThenonballastwatershipsweredevelopedatthelaboratoryoftheauthorsatOsakaPrefectureUniversity,Japan.Inthepresentpaper,theperformancesofthreekindsofbowshapesdevelopedfortheNBSweretheoreticallyandexperimentallyinvestigatedtofindthebestoneinhighwaves.Inpreviouspapers,anoptimumbowshapefortheNBSwasdevelopedincalmwaterandinmoderatedwaves.Fora2mmodelforexperimentsandcomputations,thewaveheightis0.02m.Thismeansthatthewaveheightis15%ofthedraftoftheshipinfullloadconditions.Inthispaper,addedresistancesinhighwavesupto0.07mfora2mmodelor53%ofthefullloaddraftareinvestigated.Insuchhighwaveslinearwavetheorieswhichhavebeenusedinthedesignstageofashipforalongtimemaynotworkwellanymore,andexperimentsaretheonlyeffectivetooltopredicttheaddedresistanceinhighwaves.Withthecomputationsforwaves,theshipisinafullycapturedconditionbecauseshorterwaves,λ/Lpp〈0.6,areassumed.
简介:由使用ABAQUS/Explicit,动态过程一近海风汽轮机(任何东西)乘在前面方向的5000DWT的一艘轮船受灾被模仿。任何东西位于一种综合安装技术构造的一个大规模对桶基础。根据模拟结果,在轮船碰撞下面,塑料地区的某个范围出现在桶基础,和具体塑料地区的弧转变结构的一个本地区域以内严重被损坏。因为任何东西塔的压力水平是相对低的,OWT塔是影响的更少。因为短舱和片的团直到400t,大惯性的力量在OWT塔的顶被产生。塔的排水量在在在惯性的力量的行动下面的1s的结束的轮船碰撞的相反的方向。仅仅在轮船鞠躬有次要的损坏。大多数动能被转变成塑料驱散并且由桶基础的弧转变结构吸收了。
简介:<正>Eversinceitsfounding,theWorldBridgeFoundationofHungaryhasbeenaimingtosetupaplatformofdialoguebetweenChinaandHungary,enhancingmutualunderstandingandcooperationbetweenpeoplesincentralandeasternEuropeancountriesandtheChinesepeoplewithseveralthousandyearsofhistory.AsthefounderandHonoraryChairmanoftheFoundation,Ihavemadecontinuouseffortsinthis
简介:<正>TheWorldArtMuseumofChinaMillenniumMonumentisaimedatcollecting,studyingandexhibitingtreasuresofworldcivilizationsandarts.Asaninnovativetypeofmuseum,itwasestablishedin2006andhassincethenreachedoutextensivelyininternationalculturalexchanges,notonlypromotingitsowndevelopment,butalsofacilitatingChina’scultural
简介:<正>Dancingisoneoftheearliestformsofartsborninthelonghistoryofhumanbeings.Asacreativedancer,Ipersonallyholdthatthegreatestcharmofdancingisthatyoucoulduseyourbodylanguagetothelargestextenttotrulyexpressyourthoughts,emotionsandinsights,soastostrivetoachievegenuinecommunicationthattranscendslanguagesandwritingbetweenthedancersandtheaudience.
简介:Thispaperpresentsin-situseismicperformancetestsofabridgebeforeitsdemolitionduetoaccumulatedscouringproblem.Thetestswereconductedonthreesinglecolumnsandonecaisson-typefoundation.Thethreesinglecolumnswere1.8mindiameter,reinforcedby30-D32longitudinalreinforcementsandlaterallyhoopedbyD16reinforcementswithspacingof20cm.Thecolumnheightis9.54m,10.59mand10.37mforColumnP2,P3,andP4,respectively.ColumnP2hadnoexposedfoundationandwassubjectedtopseudo-dynamictestswithpeakgroundaccelerationof0.32gfirst,followedbyonecyclicloadingtest.ColumnP3wasthebenchmarkspecimenwithexposedlengthof1.2monitsfoundation.TheexposedlengthforColumnP4wasexcavatedto4m,approximately1/3ofthefoundationlength,tostudytheeffectofthescouringproblemtothecolumnperformance.BothColumnP3andColumnP4weresubjectedtocyclicloadingtests.Basedonthetestresults,duetothelargedimensionofthecaissonfoundationandthewellgradedgravelsoiltypethatprovidedlargelateralresistance,theseismicperformanceamongthethreecolumnshadonlyminordifferences.LateralpushtestswerealsoconductedonthecaissonfoundationatColumnP5.Thecaissonwas12mlongandhadcircularcross-sectionswhosediameterswere5mintheupperportionand4minthelowerportion.AnanalyticalmodeltosimulatethetestresultswasdevelopedintheOpenSeesplatform.Theanalyticalmodelcomprisednonlinearflexuralelementsaswellasnonlinearsoilsprings.Theanalyticalresultscloselyfollowedtheexperimentaltestresults.Aparametricstudytopredictthebehaviorofthebridgecolumnwithdifferentgroundmotionsanddifferentlevelsofscouringonthefoundationarealsodiscussed.
简介:Inthispaper,numericalpredictionofshipmotionresponsesinlong-crestirregularwavesbytheURANS-VOFmethodispresented.Awhitenoisespectrumisappliedtogeneratetheincomingwavestoevaluatethemotionresponses.Theprocedurecanreplaceadecadeofsimulationsinregularwavewithonesingleruntoobtainacompletecurveoflinearmotionresponse,considerablyreducingcomputationtime.Acorrectionprocedureisemployedtoadjustthewavegenerationsignalbasedonthewavespectrumandachievesfairlybetterresultsinthewavetank.Threeshipmodelswithfivewaveconditionsareintroducedtovalidatethemethod.Thecomputationsinthispaperarecompletedbyusingthesolvernaoe-FOAM-SJTU,asolverdevelopedforshipandoceanengineeringbasedontheopensourcecodeOpenFOAM.Thecomputationalmotionresponsesbytheirregularwaveprocedurearecomparedwiththeresultsbyregularwave,experimentsandstriptheory.Transferfunctionsbyirregularwavecloselyagreewiththedataobtainedintheregularwaves,showingnegligibledifference.Thecomparisonbetweencomputationalresultsandexperimentsalsoshowgoodagreements.TheresultsbetterpredictedbyCFDmethodthanstriptheoriesindicatethatthismethodcancompensatefortheinaccuracyofthestriptheories.Theresultsconfirmthattheirregularwaveprocedureisapromisingmethodfortheaccuratepredictionofmotionresponseswithlessaccuracylossandhigherefficiencycomparedwiththeregularwaveprocedure.
简介:AbridgearmprototypeofITERpoloidalfield(PF)convertermoduleshasbeendesignedandfabricated.Non-cophasecounterparallelconnectionischosenasthearmstructureoftheprototype.Amongallfactorsaffectingcurrentsharing,armstructureisthemainone.Duringthedesignofthearmprototype,anovelmethodbasedoninductancematrixesisemployedtoimprovethecurrentsharingofthebridgearm.Thetestresultsontheprototypeshowthatthecurrentsharingperformanceofthearmprototypeismuchbetterthanrelevantdesignrequirement,andthatthematrixmethodisveryeffectivetoanalyzeandsolvethecurrentsharingproblemsofthyristorconverters.
简介:<正>OntheearlymorningofNovember30th,Idepartedfromsmog-coveredBeijingbythefirstflightandarrivedinZhuhai3hourslater.IspentanotherhouronthebusandfinallyarrivedatBeijingNormalUniversityZhuhai(BNUZ).OnbehalfofCAFIU,IattendedtheactivitiesorganizedbytheUniversitymarkingthe20-yearteachingofMr.TakashiNaitoinChina,including"MyLife—forJapan-ChinaFriendship"PhotographicExhibition.
简介:在地震刺激下面的液体结构相互作用是很复杂的,并且这样深水里的桥的损坏鉴定是关键技术保证安全服务。就增加的集体效果和液体结构相互作用效果而言基于非线性的莫里森方程,结构上的水动力学压力的效果被分析。一系列在水下的摇晃表格测试在空中并且在水里被进行。水动力学压力影响的动态特征被讨论,水动力学压力的分发也被分析。另外,结构的损坏通过自然频率和形式的弯曲的差别被区分,并且当时与测试结果相比。这研究的数字模拟和测试显示结构上的水动力学压力的效果不应该被忽视。损坏,损坏的地点和严厉的度的存在能通过结构频率和形式的弯曲的差别的变化被判定,这也被发现。
简介:A3D为Sutong留下来电缆线的桥(SCB)的有限元素(FE)模型基于ANSYS被建立。桥的动态特征用一个subspace重复方法被分析。基于记录的风数据,测量系列表达式用非线性的最少平方的回归方法被介绍。在桥地点的狂暴的风被模仿基于光谱表示方法和快速傅里叶变换技术。桥的动态特征上的一些关键结构的参数和措施的影响被调查。这些参数包括死了的负担紧张,以及钢盒子girder的垂直、侧面、扭力的僵硬。另外,在钢盒子girder的颤动模式上在塔和girder之间采用的连接设备的有弹性的僵硬的影响被调查。分析证明垂直、侧面、扭力的buffeting排水量,回答作为死者逐渐地减少的所有装载紧张增加。动态特征和SCB的结构的buffeting排水量反应被钢盒子girder的垂直、扭力的僵硬仅仅稍微影响,并且当侧面的僵硬增加,侧面、扭力的buffeting排水量回答逐渐地减少。这些结果为动态分析提供一本参考书并且super-long-span设计留下来电缆线的桥。