流固耦合作用下鞍形薄膜結(jié)構(gòu)非線性動(dòng)力特性

Nonlinear Dynamic Characteristics of Hyperbolic Parabolic Membrane Structure under Fluid-structure Coupling

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Nonlinear Dynamic Characteristics of Hyperbolic Parabolic Membrane Structure under Fluid -structure Coupling

吳孟瑤'，宋維舉1，2，3

（1．河北工程大學(xué) 300072；3．華恒建設(shè)集團(tuán)有限公司，寧波315012）

中圖分類號(hào)：TU33 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1005-8249（2025）01-0105-08

DOI：10.19860/j.cnki.issn1005-8249.2025.01.020

WU Mengyao1， SONG Weiju1，2，3

(1.School of Civil Engineering，Hebei University of Engineering，Handan O56038，China； 2. School of Civil Engineering，Tianjin University，Tianjin 30OO72， China； 3.Huaheng Construction Group Co.，Ltd.，Ningbo 315012，China）

Abstract：Membrane materialisanewtypeof building material，whichhasthecharacteristicsoflightweightandlarge span. Undertheactionof windload，themembrane materialispronetosignificantdeformationandvibration，whichmayhavea" couplingeffct"withthesurroundingairflowfield，andinseverecases，itwilleadtosructuralinstability，thustreatening thesafetyof buildings.Inthis paper，basedonvon Karman’slarge deflection theoryandd‘Alembertsprinciple，the governingequationsof strong nonlinear vibrationof sadle-shapedmembrane structuresunderfluid-structurecoupling ffect arederived，andthe analytical solutionsareobtained by Galerkin method.Theparameters such aswindspeed，modeorder， membrane surface density，initial displacement，prestress，membrane surface sizeandvector-spanratiounderfluid-solid couplingareanalyzed，andallhavediferentinfluencesonthevibrationcharacteristicsofsaddle-shapedmembranestructures. Then，thegenerallawof strong nonlinear vibrationoforthotropictension membranestructuresunderfluid-solidcouplingis summarized，which provides theoretical support and reference for research and application in related fields.

Key words：membrane structure； orthotropy；fluid- structure coupling；nonlinear vibration

建筑結(jié)構(gòu)

0 引言

膜結(jié)構(gòu)是一種新型的建筑結(jié)構(gòu)，具有重量輕、跨度大等優(yōu)點(diǎn)，在建筑工程領(lǐng)域被廣泛應(yīng)用。（剩余20127字）