單層肋環(huán)形球面網(wǎng)殼的強(qiáng)度和穩(wěn)定性分析.pdf

1、浙江大學(xué)碩士學(xué)位論文單層肋環(huán)形球面網(wǎng)殼的強(qiáng)度和穩(wěn)定性分析姓名：張年文申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：空間結(jié)構(gòu)指導(dǎo)教師：董石麟2003.2.1◎渺，t士尊壩士學(xué)位論文摘要Stability&StrengthoftheSingle—LayerRibbedDomesABSTRACTThesingle1ayerribbeddomeisanattractive&knownreticulatedstructurei13thispaperthestructu

2、reisanalysedItisenqphasizedthathowtoanalysethisstructureandhowtoforlTlitInthispapertheformexalgebraisusedtodescribetheconfigurationoftheribbeddomeThefiniteelementmethodandthebeamcolumnmethodareintroduced；theoptimizationo

3、fthesinglelayerretieulatedshellisalsodiscussedasimplealgorithmispresented，andanexampleshowestheeffectnessofthealgorithmBasedonthetheoryofthebeam—column，itisstudiedthathowtoanalysethestructurewiththerandomimperfectmembers

4、Thecomparisonofthelimitloadsofastructurewithrandomiroperfeetmembersandofitwithidealmembersrevealsthatthelimit10adofthelafterjsmuchmorethallthatoftheformerThefibbeddomesIoadedthesymmetricalunifomIoadsareanalysedeomprehens

5、ivelywithfulIpinnedsupportssomeformulasarefiredaccordingthelimitloadscalculatedbythefiniteelementmethodIntheprOCCSSofintroductionofthenonlinearfiniteelementmethod，theupdated—Lagrangemethodisemployed，itisderivedthatageome

6、tricalstiffenssconsideredthenonlinearstrainofthememberaxiledirectioncomparisonofthestiffnesseswiththeimerpolatingfunctionoftheHermitecurveandthesinecurveisgivenIntheprocessofintroductionofthebeamcolumnmethodthememberorit

7、entationmatrixisemphasizedFromboththefmiteelementmethodandthebeam—columnmethodtwoFORTRANcodesareprogrammedThesalne咖lcture’SdisplacementscalculatedbybothprogramsarecomparedInthispapertheconclusionsasfollowingcanbederivedf

8、rhemembersmustnotbesubdNidedwhenthes矗1，cfu地isanalysedwithconsiderationoftherandomimperfectionofthemembersItcanbcrevealedthattheinternalforcescarlbelargewhenthevaluek(themeaningofkcanbefoundinChapter5inthispaper)approache

9、stothevalue玎Theoreticallythevalueskofallofthestructurescomposedofbeamcolumnmemberscannotapproachtothevalue萬itisneededtobetestifledbytheexperimentsiiWimthesamegeometrical&materialparametersthelimitloadsofribbeddomesaremuc

10、hlCSSthanthatofthe3directionreticulatedshellIntheprocessoffittingthefoumulasinthepaperthefollowingparametersareconsidered：theequivalenteffectivethinness，theequivalenteffectivemomentofincrtia，theradiusofthesphericaldomean

11、dtherationofthehei曲tandthespanWithsomanyparametersconsideredbuttheerrorscannotbeignoredyetnleproblemismuchCOlElplicatedthanthatitisimaginediiiTheformexalgebraisalleffectivemethodtodescribethegeometricalconfigurationofthe