資源描述：
《橋墩壅水的數(shù)值模擬》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、北京交通大學(xué)碩士學(xué)位論文橋墩壅水的數(shù)值模擬姓名：張念申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：齊梅蘭20080601ABSTRACTABSTRACT：Atthedesignofthebridge，thecalculationofbridgeopening,thearrangementofdiversionstructuresandthegeneralschemecomparisonareallbasedonhydrauliccomputation．Thehydrauliccomputationofbridge，exceptfornaturalstreamandunre
2、gulatedbed，isbasedontheheightofbackwater．Ⅲsisbecauseoftheapertureofpierscompresseswater,SOthevelocityofwaterincreasesandwhereclosethefloodingearthbankproducethebackwaterthatishigherthanthenormallevel．Andthedownriverwatersurfaceislowerthanthenormallevel，SObetweentheearthbanktherewillbecomin
3、ghugepressuredifference,whichwillcausedangerousattheperiodofflooding．Andthebackwaterwillstronglyaffecttheheightofearthbankandthebridgeclearance．Sotheheightofbackwaterhasveryimportantsignificance,andthisthesismakessomeresearchatthebackwater．111ethesisfirstlyreviewsbrieflythemechanismofbackw
4、aterandtheeffectfactors，andthenanalysesthefactorsthatarerelevantwiththebackwaterintheformulaeusedusuallyathomeandabroad，andmakesasummaryofdomainsandconditionsoftheadoptionoftheformulae．BecausethereiSnotauniformformulaCallbeacceptedatthepresenttime,SOitisnecessarytoanalyzethebackwaterofpier
5、susinganumericalmethod．Asthefollowing,thethesissimulatesthesituationofflowfieldandbackwateratpierswi廿1plane2Dnumericalmodule．ThethesisutilizestheFLUENTsoftwarethatisusedtocalculateliquidequationstoestablishtwodimensionalhorizontalnumericalsimulationatpiersandchoosesasetoflaboratorydatatode
6、monstratethereliabilityandrationalityofthesimulation．Theresultindicatesthatthemodulecansimulatethesituationofflowandcalculatethebackwateratthepiers．Consequently,withthechangeofdifferentfactorsaffectingtheheightofbackwater,thethesisanalysesthereasonsoftheheightnearbythepiers．Theresultconclu
7、desthatthemodulesCansimulatetheatmosphereofwaterflowandbackwateratpierswellandhavecertainutilization，andthesametime，instructthedesignofthebridgeinsomefacets．Itissignificativetothecalculationofthebackwaterofpiers．KEYWORDS：Backwaterofpiers；CompressedRiver；Numeri
