Vulnerability-based robust design optimization of imperfect shell structures

Papadopoulos, V; Lagaros, ND

dc.contributor.author	Papadopoulos, V	en
dc.contributor.author	Lagaros, ND	en
dc.date.accessioned	2014-03-01T01:32:24Z
dc.date.available	2014-03-01T01:32:24Z
dc.date.issued	2009	en
dc.identifier.issn	0167-4730	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20112
dc.subject	Monte Carlo simulation	en
dc.subject	Non-linear TRIC shell element	en
dc.subject	Spectral representation	en
dc.subject	Stochastic imperfections	en
dc.subject	Vulnerability-based robust design optimization	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Monte Carlo simulation	en
dc.subject.other	Non-linear TRIC shell element	en
dc.subject.other	Spectral representation	en
dc.subject.other	Stochastic imperfections	en
dc.subject.other	Vulnerability-based robust design optimization	en
dc.subject.other	Buckling	en
dc.subject.other	Computer simulation	en
dc.subject.other	Design	en
dc.subject.other	Monte Carlo methods	en
dc.subject.other	Philosophical aspects	en
dc.subject.other	Shape optimization	en
dc.subject.other	Shells (structures)	en
dc.subject.other	Structural optimization	en
dc.title	Vulnerability-based robust design optimization of imperfect shell structures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.strusafe.2009.06.006	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.strusafe.2009.06.006	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	A stochastic vulnerability-based robust design procedure of isotropic shell structures possessing Uncertain initial geometric as well as material and thickness properties that are modeled as random fields is assessed against conventional and reliability-based robust design procedures. The main idea of the vulnerability-based design philosophy is to achieve robust optimum designs while allowing designers to determine explicitly accepted probabilities that various performance objectives will not be exceeded, by introducing additional probabilistic (Vulnerability) constraints. For this purpose, a stochastic finite element methodology is incorporated into the framework of an efficient two-objective robust design optimization formulation. This combined approach is then implemented in order to obtain optimum designs of an "imperfect" shell structure involving random geometric deviations from its perfect geometry as well as a spatial variability of its modulus of elasticity and thickness. Two-objective functions, the material volume of the structure and the coefficient of variation of the buckling load of the shell, are used for the description of. the optimization problem, subject to deterministic, reliability and vulnerability constraints. (C) 2009 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Structural Safety	en
dc.identifier.doi	10.1016/j.strusafe.2009.06.006	en
dc.identifier.isi	ISI:000271342000004	en
dc.identifier.volume	31	en
dc.identifier.issue	6	en
dc.identifier.spage	475	en
dc.identifier.epage	482	en