Experimental investigation of buckling of wind turbine tower cylindrical shells with opening and stiffening under bending

Dimopoulos, CA; Gantes, CJ

dc.contributor.author	Dimopoulos, CA	en
dc.contributor.author	Gantes, CJ	en
dc.date.accessioned	2014-03-01T02:08:58Z
dc.date.available	2014-03-01T02:08:58Z
dc.date.issued	2012	en
dc.identifier.issn	02638231	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29756
dc.subject	Buckling	en
dc.subject	Experiments	en
dc.subject	Numerical analysis	en
dc.subject	Opening	en
dc.subject	Shells	en
dc.subject	Stiffening	en
dc.subject	Wind turbine tower	en
dc.subject.other	Buckling behaviors	en
dc.subject.other	Contact interaction	en
dc.subject.other	Cut-out	en
dc.subject.other	Cylindrical shell	en
dc.subject.other	Experimental investigations	en
dc.subject.other	Experimental studies	en
dc.subject.other	Geometric characteristics	en
dc.subject.other	Geometric imperfection	en
dc.subject.other	Geometrical non-linearity	en
dc.subject.other	Inelastic effects	en
dc.subject.other	Load-displacement curve	en
dc.subject.other	Numerical predictions	en
dc.subject.other	Numerical studies	en
dc.subject.other	Opening	en
dc.subject.other	Shape and size	en
dc.subject.other	Shells	en
dc.subject.other	Stiffening	en
dc.subject.other	Strength loss	en
dc.subject.other	Ultimate loads	en
dc.subject.other	Wind turbine tower	en
dc.subject.other	Wind turbine towers	en
dc.subject.other	Experiments	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Shells (structures)	en
dc.subject.other	Wind turbines	en
dc.subject.other	Buckling	en
dc.title	Experimental investigation of buckling of wind turbine tower cylindrical shells with opening and stiffening under bending	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.tws.2012.02.011	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.tws.2012.02.011	en
heal.publicationDate	2012	en
heal.abstract	An experimental and numerical study of the buckling behavior of cantilevered shells with opening and stiffening is presented in this paper. Unlike previous experimental studies, the present work focuses on shell slenderness as well as opening and stiffening reflecting the main geometric characteristics of wind turbine towers. The specimens can be classified as medium slenderness shells affected mainly by inelastic effects and secondarily by geometric imperfections. Both loaddisplacement curves as well as strain measurements are presented and compared with numerical predictions by finite element analyses, accounting for both inelastic effects and geometrical nonlinearity as well as for contact interaction between the various parts of the specimens. A good agreement between numerical and experimental results was found in terms of loaddisplacement curves and ultimate load. Due to the influence of the shape and size of geometric imperfections, a complete match of the numerically obtained strains to the corresponding experimental ones was not possible. The provided stiffening was found to be able to compensate the strength loss due to the presence of the cut-out. © 2012 Elsevier Ltd.	en
heal.journalName	Thin-Walled Structures	en
dc.identifier.doi	10.1016/j.tws.2012.02.011	en
dc.identifier.volume	54	en
dc.identifier.spage	140	en
dc.identifier.epage	155	en