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Aerodynamic stability analysis of geometrically nonlinear orthotropic membrane structure with hyperbolic paraboloid / Yun-ping Xu in Journal of engineering mechanics, Vol.137 N° 11 (Novembre 2011) 

Public ISBD [article]  in Journal of engineering mechanics > Vol.137 N° 11 (Novembre 2011) . - pp.759-768 Titre : Aerodynamic stability analysis of geometrically nonlinear orthotropic membrane structure with hyperbolic paraboloid Type de document : texte imprimé Auteurs : Yun-ping Xu, Auteur ; Zhou-lian Zheng, Auteur ; Chang-jiang Liu, Auteur Année de publication : 2012 Article en page(s) : pp.759-768 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Membranes  Velocity  Aerodynamics  Hyperbolic  parabolic  shells  Orthotropism Résumé : This paper studies the aerodynamic stability of a tensioned, geometrically nonlinear orthotropic membrane structure with hyperbolic paraboloid. The aerodynamic force acting on the membrane surface is determined by the potential flow theory in fluid mechanics and the thin airfoil theory in aerodynamics. The interaction governing the equation of wind-structure is established on the basis of large-amplitude theory and the D’Alembert principle. Then, under the circumstance of single-mode response, the Bubnov-Galerkin approximate method is applied to transform the complicated interaction equation into a system of second-order nonlinear differential equations with constant coefficients. Through judging the stability of the system characteristic equation, the critical velocity of divergence instability is determined. Different parameter analysis shows that the orthotropy and geometrical nonlinearity is significant for preventing destructive aerodynamic instability in membrane structures. Compared to the planar model, there is a little inconsistency about the divergence instability regularities in the hyperbolic paraboloid model. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i11/p759_s1?isAuthorized=no [article] Aerodynamic stability analysis of geometrically nonlinear orthotropic membrane structure with hyperbolic paraboloid [texte imprimé] / Yun-ping Xu, Auteur ; Zhou-lian Zheng, Auteur ; Chang-jiang Liu, Auteur . - 2012 . - pp.759-768. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol.137 N° 11 (Novembre 2011) . - pp.759-768 Mots-clés : Membranes  Velocity  Aerodynamics  Hyperbolic  parabolic  shells  Orthotropism Résumé : This paper studies the aerodynamic stability of a tensioned, geometrically nonlinear orthotropic membrane structure with hyperbolic paraboloid. The aerodynamic force acting on the membrane surface is determined by the potential flow theory in fluid mechanics and the thin airfoil theory in aerodynamics. The interaction governing the equation of wind-structure is established on the basis of large-amplitude theory and the D’Alembert principle. Then, under the circumstance of single-mode response, the Bubnov-Galerkin approximate method is applied to transform the complicated interaction equation into a system of second-order nonlinear differential equations with constant coefficients. Through judging the stability of the system characteristic equation, the critical velocity of divergence instability is determined. Different parameter analysis shows that the orthotropy and geometrical nonlinearity is significant for preventing destructive aerodynamic instability in membrane structures. Compared to the planar model, there is a little inconsistency about the divergence instability regularities in the hyperbolic paraboloid model. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i11/p759_s1?isAuthorized=no