河道潰堤與潰堤波的一、二維耦合計算數(shù)值模擬.pdf

1、河海大學碩士學位論文河道潰堤與潰堤波的一、二維耦合計算數(shù)值模擬姓名：曲紅玲申請學位級別：碩士專業(yè)：水力學及河流動力學指導教師：汪德爟20060501河海大學碩士論文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VariationofthebreachnowandthenowchamcteristicofdifIaction，renectionanddefonnationduringthepropagationofdikebreakwaVesThesimulationcaIlrealisticallyshowmeburstprocessofdikenisco