“彈射法”測量膜結構預張力的理論及應用研究.pdf

1、重慶大學碩士學位論文“彈射法”測量膜結構預張力的理論及應用研究姓名：劉長江申請學位級別：碩士專業(yè)：土木水利施工指導教師：鄭周練20090602英文摘要ABSTRACTThemembranestructureisanewstructuresystemwhichhasbeenrisingduringtherecentseveraldozensofyearsBecauseofitseconomybeautyandlessdeadweighti

2、tiswidelyappliedtolargespanstructures，suchaslarge—scalestadium，exhibitioncenterworksofdecorationandSOonTheapplicationoftensionedmembranestructurewasthemostextensiveinallkindsofmembranestructuresystems111etensionedmembran

3、estructure’SstiffnessisformedbyapplyingpretensiontoitInordertocontroltheactualpretensionvaluetally謝mthedesignpretensionvalue，ensureengineeringqualitypreventthefold，relaxationandbeingtornreducetheengineeringaccidents，thea

4、ccuratemeasurementofthemembranestructure’spretensionseemsveryimportantandnecessaryTllemeasurementoftheatworkingtensionedmembranestructure’SpretensionbelongstothenondestructivemonitoringcategoryNowadays，howtomeasurethepre

5、tensionofthetensionedmembranestructRreaccuratelyisstilltheresearchfocusinthemembranestructurefieldThroughresearchingthenonlinearlargedeflectionvibrationoftensionedmembrane，putforwardanewmethodofmeasuringthemembranestruc觚

6、e’Spretensiorr‘qectionmethod’Thismethodassumesasmallballthatisregardedasaparticleejectontoatensionedmembranesurfacewithfixededges，thenthetensionedmembranevibrateandthesmallballisreboundedThroughmeasuringthesmallball’seje

7、ctionandreboundvelocityandthemembrane’Samplitudethemembrane’SpretensioncanbeobtainedIntheresearchofthetheoriesandapplicationsofthe“EjectionMethod’，thelargedeflectiontheoryofmembranewasappliedtesearchthevibrationoforthotr

8、opicmembranewhichcommonlyappliedinthemembranestructureengineeringDerivedandsolvedthegoverningvibrationequationsoforthotropicmembrane，andobtainedthepowerseriesformulaofnonlinearvibrationfrequencyofrectangularmembranewithf

9、ouredgesfixed。Throughthecomputationalexamplecomparedandanalyzedtheresultsofthelargeandsmalldeflectionvibrationoftherectangularorthotropicmembrane、析Ⅱ1fouredgesfixed111ecomparisonandanalysisprovedthattheresultsoflargedefle