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《雙層殼體在沖擊載荷作用下的動(dòng)力響應(yīng)分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、西南交通大學(xué)碩士學(xué)位論文雙層殼體在沖擊載荷作用下的動(dòng)力響應(yīng)分析姓名：王怡月申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：工程力學(xué)指導(dǎo)教師：趙華20070501西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractImpactisalwaysneedtobeconsideredwhiledesigningandanalyzingshellinengineering,soithassignificantpracticingmeaningtostudytheplasticdynamicissueofthedouble-layersshellmodelunderthehigh·speedpulsei
2、mpact．Inthispaper,allexperimentofpulseimpactingonLYl2aluminumalloyunderthehigh-speedhasbeendesignedandimplemented．Theexperimentaldatahasbeencollectedandanalyzed．Thematerialch盯acterisficoftheLYl2aluminumalloyunderthehigh-speedpulseimpactby52m／sor32m／shavebeenobtained．Byintroducingtwotarge
3、t’srigidityandtwobullet’sinitialvelocity52m／sand32m／s，theimitatingcalculationhasbeenmadefortheplasticdynamicissueofthedouble-layersshellmodelunderthehigh-speedpulseimpacting．TheLagrangeanalyzerofexplidtintegralmethodofdynamicLimitedElementsisappliedtothecalculation．Theresultpresentsthere
4、lationsamongthestructuraldisplacement，speed，acceleration，stress，strainandtimeoftheexteriorshell，themiddleshellandtheinsidesolidofdouble·layersshellundertheimpactintheaxis·direction，andshowstheevolvementp／ocessofstructureofdouble—layersshellunderthehigh-speedImpactintheaxis-direction。Afte
5、ranalyzingtheprototype’sstructural，andconsideringthetheoryofenergy’sdissipationofmaterialunderthehigh-speedpulseimpact，theoptimizeddesignofprototype’sstructuralhasbeendesignedtosatisfythedefendinginsidesolidandeconomizematerial．Threestructuremodelshavebeenmadeandtheimitatingcalculationof
6、impactingontwokindsofrigidity’stargethasbeenimplementedforeachofthemundertwohigh—speedpulseimpactsintheaxis·direction．Thestressandsffainvalueandtheirdistributionoftheexteriorshell，themiddleshellandtheinsidesolidundereverytime，achievetherelmionsamongthestructuraldisplacement，speed,西南交通大學(xué)碩
7、士研究生學(xué)位論文第1ll頁accelerationandtimeoftheinsidesolidofthreedouble-layersshellundertheimpactintheaxis-dire圮tionhavebeenobtained．Andthedynamicdevelopmentalprocessofdouble-layersshellmodelunderfourexteriorloadshasbeengained．Byanalyzingandcontrastingtheoutcomeoffourspeciesnumeric
