河道潰堤與潰堤波的一、二維耦合計(jì)算數(shù)值模擬.pdf

1、河海大學(xué)碩士學(xué)位論文河道潰堤與潰堤波的一、二維耦合計(jì)算數(shù)值模擬姓名：曲紅玲申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：水力學(xué)及河流動(dòng)力學(xué)指導(dǎo)教師：汪德爟20060501河海大學(xué)碩士論文NumericalsimulationforcoupIingofone—dimensionalriVerandtwo—dimensionaIdikebreakwavesABSTRACTThef如tspreadingdikebreal【吼vescausedbyriVerdike

2、burstcando日eatharIIlto血esafea11dpmpemesofhumaIlbeingTherefore，tllecoupledn砌ericalsimulationofriver趾ddikebreakwavesisofgreatimportancetotllepredictionofsubmergingpmcessi11poldeLAhydrauIicmodelofcoupling1一DriVerdikebreak洫g

3、aIld2一Ddikebreakwavesisestablishedint11epapeLTheSaint—Venantequationsusedint|lesimulationofriverarediscretizedbythePreissm姍implicitscheme，whichshowsgoodstabiIityandhighprecision111ecalculationiscoupled塒thtllenumericalsin

4、mlationoftllebreach111edykebreakprocessissupposedtobegradualandtllebreachissimulatedasaIlechelon鏟ongwiderwithtimeTheTvD—MUSCLschemebasedonFVM(FiniteVblumeMemod)andunstructuredgridsisusedto山ecomputationofdjkebreakwaVesThe

5、resultsshowtbat山isschemeisnotoIllynonoscillatoⅨbutalsocapableof廿eatillghydr州icjumpautomaticalIyThehydraulicmodelofcouplinglDriVera11d2Ddikebrea：k、vavesrealizest11etransitionfrom1Dcalculationwaterareato2一Dwaterarea，aIldit

6、showsⅡleprocessofriverdykebreaking，theVeloc時(shí)VariationofthebreachnowandthenowchamcteristicofdifIaction，renectionanddefonnationduringthepropagationofdikebreakwaVesThesimulationcaIlrealisticallyshowmeburstprocessofdikenisco