明渠水面線計算方法分析研究.pdf

1、西北農(nóng)林科技大學(xué)碩士學(xué)位論文明渠水面線計算方法分析研究姓名：胡宇申請學(xué)位級別：碩士專業(yè)：水利工程指導(dǎo)教師：李援農(nóng)20081028AnalysisofcalculationmethodsforopenchannelwatersurfaceAbstractSincethechannelslope，roughness，thecross—sectionalgeometry，buildinghydraulicstructuresmakechang

2、estothewaterdepthandvelocityintheopenchannel，whichisnonuniformflowandbringsmuchinconveniencetothecalculationofwatersurfaceprofileArtificialchannelsandtheriverwaterarealmostnon—uniformflow，SOthestudyofnon—uniformopenchann

3、elflowtosolvethepracticalproblemsofproductionisofgreatsignificanceInthispaper，thecharacteristicofopenchannelwatersurfaceprofileisqualitativeanalysised，theexistingwatersurfacecalculationmethodsaresummarizedandverifiedOnth

4、isbasis，asimplifiedcalculationformulaforwatersurfaceprofileonopenchannelwitharchbediscarriedoutWithcomparisonoftestresultsandnumericalsimulationresults，themethodhashighprecisionincalculatingontheopenchannelwitharchbed，ca

5、nbeusedforengineeringdesignandprovideareliablehumericalcalculationTheexistingsub—summethodissimple，easytooperated，intheabsenceofcompmeritneedstoomuchhumanworkItcanbedoneeasilywiththeuseofcomputersthroughasimpleprocessSot

6、hismethodgetsthemostwidelyusedIntegrationandchartsofworkbecauseoftheirrelativelytedious，arerestrictedintheapplicationsubjectInthispaper，theexistingwatersurfacecalculationmethodisonlyforafixedslope，butinsomemajorprojects，

7、slopingsurfaceisalsowidelyusedattheendofdrainagetrough，suchasoverflowweircurve，thecurveofLongtaitou，theWoqisurface，Theslopecanachieveverygentleslopeattheendofthetransition，SOthattherewillbeasmoothflowpatternattheendThese

8、non—prismchannel，inclassichyd【rauliccalculationiSnotpresentedinfullIntheviewofthis，itssurface—Formulawasderived，thatamorecompletesurfacetroughoftheclassiclinecalculationTheresultswillprovidetechnicalbasisforthedesignsurf