虛擬激勵法求解隨機(jī)熱傳導(dǎo)問題.pdf

1、碩士學(xué)位論文虛擬激勵法求解隨機(jī)熱傳導(dǎo)問題PseudoExcitationMethodforSolvingStochasticHeatConductionProblems作者姓名：學(xué)科、專業(yè)：學(xué)號：指導(dǎo)教師：完成日期：直蠱鵬固住也塋2Q圣Q圣Q18拯連云(塾援)2Q豎芏12旦!且一大連理工大學(xué)DalianUniversityofTechnology虛擬激勵法求解隨機(jī)熱傳導(dǎo)問題PseudoExcitationMethodforSolving

2、StochasticHeatConductionProblemsAbstractThetemperaturefieldsofrealobjectsunderrealconditionsoftheirfunctioningarestochasticThestochasticcharacterofthetemperaturesfieldd∞en(1sonthedominatingrandomfactors0ftensuchfaetor$，s

3、uchasthepowersofheatsources，thermalconduetivitycoefficients，coefficientsofheattransferfromthebodysurfacetothemedium，ambienttemperature，andthewidthofgapbetweencontactingbodiesarerandomInthosecaseswhentherandomcharacteroft

4、hetemperaturefieldcannotbeneglectedorhighrequirementsareimposedontheadequacyofthetemperaturedistributionsimulation，itisnecessarytosolvetllestochasticheatconductionequationThemostpracticallyimportantcharacteristicsofthest

5、ochastictemperaturefieldsarethefleldsofitsfnstandsecondmoments，vizofexpectationanddispersionThesearecalledthesolutionof也estochasticheatconductionequation。Inthispapertherecentlydevelopedpseudoexcitationmethodforstructural

6、randomvibrationisextendedtothesolutionofstochasticheatconductionproblems，basedonthesimilaritybetweentherandomvibrationandstochasticheatconductionSeveralnumericalexamplesarecarriedouttoverifytheproposedmethodwi也satisfacto

7、ryresultsThethesisfocusesonthelawofstochasticheatconductionunderrandominputs，withoutregardtotheinfluenceofstochastic也ermalparametersThemajorworkofthisthesisineludes：1Thetheoryofpseudoexcitationmethodisintroducedindetaili

8、nthepresentpaper；2Thenumericalmodelofstochasticheatconductionisestablished；3111ePseudoExcitationMethodisappliedinthispapertosolvestochasticheatconductionproblemswithstationaryrandomprocessinputs；4ThePseudoExcitationMetho

9、disalsousedinthispapertosolvestochasticheatconductionproblemswithnonstationaryrandomprocessinputs；5TheinversestochasticheatconductionproblemisstudiedbvtheInversePseudoExcita【tionMethodKeyWords：RandomProcessFiniteElement；