雷擊金屬結(jié)構(gòu)物時(shí)雷電流分布的研究.pdf

1、合肥工業(yè)大學(xué)碩士學(xué)位論文雷擊金屬結(jié)構(gòu)物時(shí)雷電流分布的研究姓名：湯華奇申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電工理論與新技術(shù)指導(dǎo)教師：杜少武20100401TheresearchonlightningdistributionwhenitstrikestometallicstructureAbstractInthispaperaMethodofFiniteDifference(FDM)calculationtoanalyzethelightningdis

2、tributionwhenitstrikestothemetallic咖ctureisdeducedTheModelingSimulationsoftheregularandirregularmetallic咖cturethatlighthingdistributesonthemarebuiltandachievetheresultsofthelightningdistributionThemaincontentsincludethef

3、ollowingaspectsAboutlightningpreventionofaircraft，expatiateonaircraftlightningeffects，themechanicaleffectsandthermaleffectsoflightningarealsoanalyzedThemaincharacteroflightningstrikestoaircraftisdepictedandputtingforward

4、themeasuresoflightningpreventionAbouttheknowledgeoflightningmodels，theformofnaturelightningandthecharacteroflightningvoltagearedescribedatfirstThetypeoflightning，fivedifferentlightningmodelsandlightningparametersaregiven

5、EspeciallyaccordingtoHeidlerandPulsefunctionmodels，detailedlydiscussedtheadvantageanddisadvantagebetweenthesestwomodelsbymeansofsimulatingrespectivelyintimefieldandfrequencyfieldAboutthenumericalFDM，firstlyrecitingitspri

6、nciple，adoptingfoursquareandtriangularcell—gridpartition，thentheFDMformulabasedonthosetwokindsofpartitionareachievedInthedifferentfieldinwhichstudyinglightningdistributes，itshouldtakeaccountintomakingthegridnotecoincidew

7、iththefieldboundaryandtaketherightgridpartitionmethodtoanalyzethelightningdistributeSOthatitcanreduceerrorsandgetneededcalculationprecisionAboutthenumericalcalculationoflightningdistributionwhenitstrikestometallicstructu

8、re，achievingthesimulationresultofregularmetallicstructurebychoosingthesquarecell—gridpartitionmethodandprogrammingonMatlabplatformAccordingtothesamemodelswiththesameparameters，italsoacquiresthecompletelycoincidentsimulat

9、ionresultbymeansofconstructingmodelsonMatlabplatformwithtrianglecellgridpartitionInallusiontoirregularmetallicstructure，themodelconstructedinthispaperisapartoffighterplane’SheadwhichisvulnerablebylightningTheresultofligh

10、tningdistributionsimulationandeverynoteareachievedByanalyzingtheresult，itcanmakeconclusionthatthesimulationresultiscoincidentwiththepracticallightningdistributionThus，theresultshowsthenumericalFDMhascertainreferencevalue