汽輪機轉子的熱應力分析和疲勞壽命研究.pdf

1、沈陽工業(yè)大學碩士學位論文汽輪機轉子的熱應力分析和疲勞壽命研究姓名：楊鳳申請學位級別：碩士專業(yè)：固體力學指導教師：陳四利20070308汽輪機轉子的熱應力分析和疲勞壽命研究AnalysisofThermalstressandResearchofFatigueLifetimeonSteamTurbineRotorAbstractForeignreformandopeningpolicyimplementedinchinatheeconomi

2、csdevelopmoreandmorequicklyNowadays，manycountriesgenerallyconfront、^dtllenergydeficiencyTherefore，itisimportanttomangerelectricpowerproductionandexpenseRecentlymoreandmoresteamturbinesareusedinmanyfields，researchonturbin

3、eisimperativeBecausetherotoristhemostimportantinsteamturbine，andchangeintemperatureandstresswillbnngoutthemaindamage，itmustbeaccumulatedgraduallyduringprocessinginitslifeappraisalThenthecalculationintemperatureandstressf

4、ieldandresearchonfatiguedamageandcreepdamageareveryimportantBasedontemperatureandstressfield，thefatigueandcreepstrainCanbestudiedthoroughlyThereforebasedonfiniteelement，thepaperproposestheoreticallytheapproachwhichusedto

5、calculatetemperaturefieldandstressfieldinrotorAswell，appliedthecalculationresults，theworksolvedfatiguedamageandcreepstraindamageFinally，takingAnshansecondpowerplant1unitsteamturbinerotorforexample，theresultindicatesthatu

6、tilizesthiskindofmethodtocalculatethepracticalproblemoftheprojectisfeasibleThearticlehascompletedmanyworks，whichshowasfollowsEducingtheformulaofthetemperatureradioactivecoefficientonsteamturbinerotorandbyFORTRAN，makingup

7、someproceduresforcalculatingthem；ByANSYS，calculatingcentrifugalforceinimpeller；calculatingthechangeruleoftemperatureandthermalstress，raisedduringstartingupandshutdownbyforce；Asforanalysisoffatigueandcreepdamage，thewearyn

8、umberoftimesandpercentageincreepdamageofsteamturbinerotorwhichareusedforappraisingthelife‘spanareworkedoutrespectively，thenaddupthemtoappraisalitslifespan；Duringprocessofactualoperation，inferringthemainlocation，wherethes