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                          Aventilationschemeoptimizationmethodforlong - distancewatertunnel
                                     maintenanceconsideringtheeffectofmusseldecay
                                                              1
                                                                                      1
                                                                              1
                                             2
                               1
                    LIUChangxin,YUHongling,WANGXiaoling,GUOZhangchao,LIPei,WANGJiajun                1
                 (1.StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin 300072,China;
                         2.CollegeofWaterResourcesandCivilEngineering,ChinaAgriculturalUniversity,Beijing 100083,China)
                  Abstract:Themusselsattachedtothelong - distancewatertunnelwallmaydieanddecayduetothemaintenance
                  drainageandreleasealotofharmfulgases ,whichseriouslythreatensthemaintenancesafety.However,theexist
                  ingresearchesonventilationsafetyofundergroundengineeringfocusonthecomparisonandselectionofventilation
                  schemesconsideringventilationeffect ,whichisdifficulttoobtaintheglobaloptimalschemethatbalanceventilation
                  effectandventilationcost,andtheinfluenceofharmfulgasesfrommusseldecayisignored.Moreover,themulti -
                  objectiveoptimizationmethodbasedonParetooptimality (PO)requiresthesecondaryselectionofthenon - domina
                  tedsolutionsetcombinedwithmulti - criteriadecisionmethodtoobtaintheoptimalsolution ,whichleadstothere
                  ductionofoptimizationefficiency.Tosolvetheseproblems ,afuzzylogicmulti - objectiveoptimizationmethodfor
                  maintenanceventilationschemeoflong - distancewatertunnelconsideringtheeffectofmusseldecayisproposed.
                  First,thefuzzymembershipfunctionsarecombinedtotransformmultipleoptimizationobjectivesintothesamecon
                  tinuousdomainspace ,theunifiedoptimizationindexissynthesized,andamulti - objectiveoptimizationmathemat
                  icalmodelbasedonFuzzylogic (FL)isconstructedforglobaloptimization.Thentheimprovedsandcatswarmop
                  timization(ISCSO),basedonchaoticmappingandoptimalneighborhooddisturbancestrategy,isusedtosolvethe
                  mathematicalmodeltoavoidthesecondaryselectionandimprovetheoptimizationefficiency.Performancetestand
                  casestudyshowthattheproposedISCSO - FLmethodhasadvantagesinsolutionquality ,solutionrobustnessand
                  computationalcomplexity.TheoptimalschemeobtainedbyISCSO - FLmethodcanmeettheventilationsafetyre
                  quirements ,theventilationcostisreducedby21.9% comparedwiththeinitialscheme,andtheoptimizationeffi
                  ciencyisincreasedby68.1% comparedwiththemulti - objectiveoptimizationmethodbasedonPO.Thisstudycan
                  provideanewideafortheventilationschemedesignandoptimizationofundergroundengineering.
                  Keywords:long - distancewatertunnel;maintenanceventilation;musseldecay;multi - objectiveoptimization;
                  fuzzylogic;improvedsandcatswarmoptimizationalgorithm


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