大环平差法在多水源环状管网计算中的应用

第19卷第1期江苏建筑职业技术学院学报Vol.19曧.12019年03月JIANGSUVOCATIONALINSTITUTEOFARCHITECTURALTECHNOLOGYMar.2019大环平差法在多水源环状管网计算中的应用王海龙1,周慧芳2(1.中交(西安)铁道设计研究院有限公司,陕西西安710075;2.江苏建筑职业技术学院建筑智能学院,江苏徐州221116)摘暋要:为了加快管网闭合差的收敛速率,简化环状管网水力计算过程,减少管网平差次数和计算工作量,进行了基于哈代—克罗斯平差法的大环平差方法,以单一水源和多水源环状管网平差过程为例,阐述了大环平差法在城市供水环状管网水力计算中的应用.结果表明:对于单一水源环状管网平差,应先对闭合差最大的大环进行平差,使其对其他环产生较大的影响,从而加快收敛速度,有时甚至可使其他环的闭合差改变方向.多水源环状管网平差较单水源要更为复杂,不仅需要增设虚节点,计算次数也大大增加.采用大环平差法可以在很大程度上加快收敛速度,保证管网闭合差向着有序的方向,达到计算要求.关键词:管网平差;大环平差法;多水源;环状管网;闭合差中图分类号:TD218文献标志码:A文章编号:20953550(2019)01004205Applicationoflargeringadjustmentmethodincalculationofmulti灢sourceringpipelinenetworkWANGHailong1,ZHOUHuifang2(1.ChinaJiaotong(Xi'an)RailwayDesignResearchInstituteCo.,Ltd.,Xi暞an,Shaanxi710075,China;2.SchoolofArchitecturalIntelligence,JiangsuVocationalInstituteofArchitecturalTechnology,Xuzhou,Jiangsu221116,China)Abstract:Inordertoincreasetheconvergencerateofclosureerrorofpipelinenetwork,simplifythehy灢drauliccalculationprocessofcircularpipelinenetwork,andreducetheadjustmenttimesandcalculationworkloadofpipelinenetwork,themethodoflargeringadjustmentbasedonHardy灢Crossadjustmentmeth灢odisadopted.Takingtheadjustmentprocessofsingle灢sourceandmulti灢sourcecircularpipelinenetworkasanexample,theapplicationoflargeringadjustmentmethodinthehydrauliccalculationofurbanwatersup灢plycircularpipelinenetworkisexpounded.Theresultsshowthatfortheadjustmentofsinglewatersourceannularnetwork,theadjustmentofthelargeringwiththelargestclosureerrorshouldbecarriedoutfirst,soastohaveagreaterimpactonotherrings,thusspeedinguptheconvergencespeed,sometimesevenchangingthedirectionofclosureerrorofotherrings;theadjustmentofmulti灢watersourceannularnetworkismorecomplexthanthatofsinglewatersource,whichrequiresnotonlyaddingvirtualnodes,butalsogreatlyincreasingthenumberofcalculationsandadoptinglargerones.Thelargeringadjustmentmethodcanspeeduptheconvergenceratetoagreatextent,andensurethattheclosureerrorofthepipelinenet灢workislessinanorderlydirectionuntilitmeetsthecalculationrequirements.Keywords