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时间:2019-05-15
《三维波浪与圆端形吊箱围堰相互作用的数值模拟》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、桥梁建设2013年第43卷第6期(总第223期)82BridgeConstruction,Vo1.43,No.6,2013(TotallyNo.223)文章编号:1003—4722(2013)06—0082—06三维波浪与圆端形吊箱围堰相互作用的数值模拟祝兵,康啊真,邢帆,韩兴(西南交通大学,四川成都610031)摘要:为研究波浪效应下不同吃水深度的圆端形吊箱围堰受波浪力的作用,运用多层d坐标变换模型追踪随时间变化的波浪自由表面,引入浸没边界法(IBM法)处理不规则结构物界面,建立三维数值模型。以京沪高速铁路南京长江大桥7号墩施工采用的围堰为背景,运用建立的模
2、型分析圆端形吊箱围堰与三维波浪的相互作用。分析结果表明:所建立的三维数值模型能够很好地模拟实际工程中三维波浪与不同吃水深度的截断柱体相互作用的问题;圆端形吊箱围堰不断下放的过程中,随着吃水深度的增加,围堰所受纵向波浪力呈上升的趋势、垂向波浪力减小,当吃水深度达到某一临界值并继续增加时,围堰所受波浪力的变化幅度很小。关键词:围堰;波浪效应;多层d坐标;浸没边界法;数学模型;数值分析中图分类号:U445.556文献标志码:ANumericalSimulationofInteractionBetweenThree-DimensionalWaveandRound-En
3、dBoxedCofferdamZHUBing,KANGA—zhen,XINGFan,HANXing(SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:TostudythewaveforcesSUbjectedbytheround—endboxedcofferdamhavingdif—ferentdraughtdepthundertheactionofthewaveeffect,themultiple—layerdcoordinatetransfor—marionmodelwasusedtotrac
4、kthetime—varyingwavefreesurfacesandtheimmersedboundarymethod(IBM)wasaddedtodealwiththeboundariesoftheirregularshapestructureandtoas—tablishthethree—dimensionalnumericalmode1.Bywayofexampleofthecofferdamusedforcon—structionofthePierNo.7ofNanjingChan~iangRiverBridgeonBeijing—ShanghaiH
5、igh—SpeedRailway。theestablishedmode1wasthenusedtoanalyzetheinteractionbetweentheround—endboxedcofferdamandthethree—dimensionalwave.Theresultsoftheanalysisindicatethatthemodelcanwellsimulatetheinteractionbetweenthethree—dimensionalwaveandthetruncatedcyl—inderhavingdifferentdraughtdep
6、thinthepracticalconstruction.Intheincessantloweringoftheround—endboxedcofferdam,withtheincreaseofthedraughtdepthofthecofferdam,thelongitu—dinalwaveforcesubjectedbythecofferdampresentsthetendencyofincreasingwhiletheverticalwaveforcebecomesdecreasedandatthetimethedraughtdepthreachesac
7、ertaincriticalvalueandcontinuouslyincreases,thechangingamplitudeofthewaveforcessubjectedbythecofferdamisquitelittle.Keywords:cofferdam;waveeffect;multiple—layerDcoordinate;immersedboundarymeth—od;mathematicalmodel;numericalanalysis收稿日期:2013—06~18基金项目:国家自然科学基金资助项目(51178397);国家科技支撑计划(
8、2012BAG05B00)Projec
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