Optimum design of shell structures with stiffening beams

Lagaros, ND; Fragiadakis, M; Papadrakakis, M

dc.contributor.author	Lagaros, ND	en
dc.contributor.author	Fragiadakis, M	en
dc.contributor.author	Papadrakakis, M	en
dc.date.accessioned	2014-03-01T01:21:11Z
dc.date.available	2014-03-01T01:21:11Z
dc.date.issued	2004	en
dc.identifier.issn	0001-1452	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16127
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0842268581&partnerID=40&md5=f4cff238334c968c3144c5b24cf48d39	en
dc.subject.classification	Engineering, Aerospace	en
dc.subject.other	Evolutionary algorithms	en
dc.subject.other	Optimization	en
dc.subject.other	Structural design	en
dc.subject.other	Topology	en
dc.subject.other	Beam composites	en
dc.subject.other	Eurocode	en
dc.subject.other	Natural mode triangular composites	en
dc.subject.other	Shell structures	en
dc.subject.other	Stiffening beams	en
dc.subject.other	Shells (structures)	en
dc.title	Optimum design of shell structures with stiffening beams	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The optimum design of stiffened shell structures is investigated using a robust and efficient optimization algorithm where the total weight of the structure is to be minimized subject to behavioral constraints imposed by structural design codes. Evolutionary algorithms and more specifically the evolution strategies (ES) method specially tailored for this type of problems is implemented for the solution of the structural optimization problem. The discretization of the stiffened shell is performed by means of cost-effective and reliable shell and beam elements that incorporate the natural mode concept. Three types of design variables are considered: sizing, shape, and topology. A benchmark test example is examined where the efficiency and robustness of ES over other optimization methods is investigated. Two case studies of stiffened shells are subsequently presented, where a parametric study is undertaken to obtain the most efficient design compatible with the regulations suggested by design codes such as Eurocode. The important role of the stiffeners and how they can be optimally chosen to improve the performance of shell structures in terms of carrying capacity and economy is demonstrated.	en
heal.publisher	AMER INST AERONAUT ASTRONAUT	en
heal.journalName	AIAA Journal	en
dc.identifier.isi	ISI:000188248000019	en
dc.identifier.volume	42	en
dc.identifier.issue	1	en
dc.identifier.spage	175	en
dc.identifier.epage	184	en