停泵斷流水錘與非斷流水錘的計(jì)算及升壓狀況的比較分析研究.pdf

1、長(zhǎng)安大學(xué)碩士學(xué)位論文停泵斷流水錘與非斷流水錘的計(jì)算及升壓狀況的比較分析研究姓名：李鍇申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：市政工程指導(dǎo)教師：楊玉思20110611AbstractOurcounlxyisrichinfreshwaterresources，but謝tllalargepopulationthequantitypercapitaisfarbelowtheworldaverageInaddition，theuneventemporalands

2、patialdistributionofwaterresourcesbringsaboutsevereregionalwatershortage，whichaltogetherhaveimpededthepeople’SlivingstandardsimprovementandtheurbaneconomicconstructionBasedonalltheabove，duringrecentyears，anumberoflong—di

3、stancediversionobjectshavebeenconstructedinwhichthewaterhammerproctetionhasbeenofgreatconcernThepapergivesabriefintroductionofwaterhammerwhenPumpisCutoffcalculations，themostcommoninwaterhammerandonthisbasis，conducmanalys

4、isandresearchofthedryingandnonstopmodelsthroughpracticalprojiectcases1)Forthetimebeing，themostusualmethodofwaterhammercalculationispoweralgorithm，whichisbasedonthecharacteristicsmethodMethodofcharacteristicsappliesthecha

5、racteristicequationderivedfrombasicdifferentialequationsofwaterhammertomakecalculatedcharacteristiclineparametersofeachpointinthepipelineForspecialpoints，italsohastolisttheboundaryconditionequationsforthecharacteristiceq

6、uationsimultaneoussolution2)Inwaterhammerelectricalgorithms，theoperatingparametersofpumpingstationsundervariousconditionsarerequestedNevertheless，theoverallcharacteristiccurveofpumpobtainedbyexperimentscallnotbedirectlyq

7、uotedbythecomputerThroughthemathematicsofdiscretepointsfromthecurveo咄andtheninterpolationoftwodiscretepoints，theacquiredparametersofthepumpcanbeusedtunthecomputerontheoverallcharacteristiccurveofpumpforacomprehensivesimu

8、lation3)Whenthepipelinepressureisreducedtothesaturationwatervaporpressure，thewaterwillvaporizeSOthatacontinuouswatercolumnseparationOCCURS，followedbyseparationofthewatercolumntobridge，andthenthegenerationofwaterhammerofc

9、avitiescollapsingcausesahugepressurerisinginpipes，asisthewaterhammerofcavitiescollapsingThispaperinvestigateswaterhammercalculationanalyzesandcomparesthecalculationresultsofstepupoftwomathematicalmodels：brokenwaterhammer