空間桿系大應(yīng)變的理論分析及有限元法的研究

1、同濟大學(xué)碩士學(xué)位論文空間桿系大應(yīng)變的理論分析及有限元法的研究姓名：陳軍申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：錢若軍岳昌智20050301ABSTRACTSpatialmemberstructuresateextensivelyusedinpracticalprojectAtpresent，theaccuracyandapplicabilityoftheanalyticalmodelandanalyticalmethodsofthes

2、patialmemberstructuresareirregularInordertoimplementthehistoricalnonlinearanalysisofthespatialmemberstruNuresunderexternalforce，itisnecessarytodevelopthepreciseanalyticalmodelandanalyticalmethodSobasedoncorrespondingrefe

3、rences，accordingtothecontinuousmediummechanicsandplastictheoryandusingthenonlinearfiniteelementmethod，thenonlinearanalyticalmodelaboutlargestrainsandanalyticalmethodarepresentedFirstly’theselectofstressandstrainaboutlarg

4、estrainsisanalyticinthispapeLandthentheconstitutiveroodelsareclassifiedTheselectofstressandstrainaboutlargestrainsisg～en，thetheoryoflargestrainsisgiven，tooThemechanicalmodelaboutlargestrainsisputforward，thefiniteelementa

5、ualysisofplasticitywithlargestrainsisalsogiven，tooDuringtheprocessofanalysisfournodesabout12degreeoffreedomelementisusedGaussintegralmethodisusedincomputingstiffnessmatfi：I；Inaddition，byusingthestaticforcecohesionmethod，

6、thismodelcanbeusedin弭lkindsofjointconnectionstructuresandirregularspatialframesFinallytheexamplesverifytheaccuracyandeffectivenessoftheanalyticalmodelandanalyticalmethodspresentedinthispaperontheotherhand，thepreciseandap