轿车焊装车间物流系统仿真与优化

合肥工业大学硕士学位论文轿车焊装车间物流系统仿真与优化姓名：魏安立申请学位级别：硕士专业：材料工程指导教师：胡小建2011-04WitnessMATLAB;MATLABWitnessWitnessMATLABSimulationandOptimizationOfLogisticsSystemOfCarWeldingWorkshopAbastractLookingatthecurrentdomesticcarmarket,domesticandinternationalwell-knownautomobilemanufacturersgatheredinawiderangeofproducts,thecompetitionbetweenautomotivemanufacturersissofierce,inadditiontodevelopingnewproductsimprovingproductqualityandperfectingbeforeandaftersalesservicetoenhancecompetitiveness.Reducingproductioncostsisthemostimportantissuewhichisconsideredtowinthemarketplaceandimprovetheircompetitiveness.Inthemanufacturingprocessreducingvehicleproductionisanimportantaspectoflogisticscosts.AcarweldingworkshopexistsmanyproblemssuchastheVehicleRoutingisirrationalandequipmentutilizationofpartofthestationisnothighandstaffingisirrationalandoperatingtimeofspotweldingrobotistoolong.WeuseWitnesssoftwareandMATLABsoftwaretoestablishmodelandsimulateanddothecorrespondingoptimization.Theresultsshowthat:usingmethodofmodelingandsimulationtooptimizeproductionlogisticssystems,wecaneffectivelysolvetheseproblemssuchastheVehicleRoutingisirrationalandequipmentutilizationofpartofthestationisnothighandstaffingisirrationalandoperatingtimeofspotweldingrobotistoolong,etc.Themaincontentsareasfollows:Firstly:weanalysizetheprocessfortheweldingworkshopofacarproductionlogisticssystem,thenestablishstructuremodeldiagramforthecarweldingworkshopofproductionlogisticssystem.Secondly:ByanalysizingVehicleRoutingproblemunderthedescriptionoftheproblem,weestablishamathematicalmodelthenuseMATLABsoftwaretoprogrammegeneticalgorithmtosolveVehicleRoutingProblem.Thirdly:AccordingtostructuremodeldiagramwecreatesimulationmodelintheWitness,thenrunthesimulationmodel,Analysizeresultsofsimulationtoidentifytheexistenceofproductionbottlenecks,andmakethecorrespondingoptimizationforbottlleneckstoimprovethesystem,andimproveequipmentutilization,therebyincreaseoutputandgivefullplaytotheproductioncapacity.Withsimulationofthelogisticssystemforacarweldingworkshop,Wegetthebestroutefordeliveryvehiclestotravelandbottlenecksandkeystationsinthepresenceofproductionlogisticssystem.Accordingtoanalysisoftheissues,putforwardoptimalschemetoimprovethesystemtherebyincreasetheutilizationofassociatedequipmenttoachievethereasonableallocationofpersonandvehicles.Theresearchmethodofthispaperhasimportantpracticalsignificanceandtheoreticalreferencevalueforlogisticssystemdesignandoptimizationforautomobilemanufacturers.Keywords:LogisticsSystem;WitnessSoftware;VehicleRoutingProblem;GeneticAlgorithm;MATLAB;SimulationandOptimization2-1............................62-2.................................93-1.....................................113-2.................................................123-3.................................................123-41.......................................153-52.......................................163-63.......................................163-74.......................................173-85......................................173-9.................................................183-10......................................213-11........................................223-12................................................223-132........................................243-141......................................253-152......................................253-163......................................263-174......................................263-185......................................273-19................................273-20....................................284-1...............................................314-2...................................324-3...........................................334-4...............................................334-5...............................................334-6...............................................344-7.......................354-8.............................................384-9...........................................384-10........................................394-11..................................394-12..................................404-13..................................405-1.........................................465-2.........................................465-3...........................................475-4...........................495-5......................495-6............................................515-7.................................525-8.....................................525-91...........................................545-102..........................................545-113..........................................555-124..........................................555-135..........................................563-115.....................153-2....................203-3................................233-4............................283-5......................................294-1..........................364-2................................414-315.........................414-425..........