Reliability based assessment of marine stiffened panels: Construction of probabilistic buckling curves

Πανταζοπουλου, Σοφία; Pantazopoulou, Sofia

dc.contributor.author	Πανταζοπουλου, Σοφία	el
dc.contributor.author	Pantazopoulou, Sofia	en
dc.date.accessioned	2024-01-16T10:34:03Z
dc.date.available	2024-01-16T10:34:03Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/58574
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.26270
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Probabilistic strength	en
dc.subject	Uncertainty quantification	en
dc.subject	Monte Carlo simulation	en
dc.subject	Response surfaces	en
dc.subject	Stiffened panels	en
dc.subject	Ship structures	en
dc.title	Reliability based assessment of marine stiffened panels: Construction of probabilistic buckling curves	en
heal.type	bachelorThesis
heal.classification	Marine Structures	en
heal.language	en
heal.access	campus
heal.recordProvider	ntua	el
heal.publicationDate	2022-09-28
heal.abstract	In ship design and shipbuilding, stiffened panels are one of the most important structural assemblies. The accurate evaluation of their ultimate strength is of high interest, due to the important role they pose in the safety of the entire structure. The proposed work focuses on a probabilistic strength approach for the compression resistance of stiffened panels. The main purpose is to construct buckling surfaces as a function of the slenderness ratios, β and λ, that are associated with a given probability of failure. Uncertainty in the material properties and production-related geometric distortions have been probabilistically modeled by considering realistic statistical structures. To evaluate the ultimate stress of stiffened panels, nonlinear Finite Element Analyses are performed, based on design of experiments (DOE) sampling schemes. The generated surrogates were first validated and then used within a Monte Carlo Simulation (MCS) framework for uncertainty propagation. The probabilistic resistance of the stiffened pane; populations of interest was obtained by identifying a parametric statistical model based on the sample statistics. The obtained statistical structures allowed for the generalized reliability assessment of stiffened plates. Finally, the probabilistic buckling surfaces were constructed over the entire scantling range of interest through quadratic polynomial fitting and Response Surface Method.	en
heal.advisorName	Ανυφαντής, Κωνσταντίνος	el
heal.committeeMemberName	Λυρίδης, Δημήτριος	el
heal.committeeMemberName	Τσούβαλης, Νικόλαος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Θαλάσσιων Κατασκευών. Εργαστήριο Ναυπηγικής Τεχνολογίας	el
heal.academicPublisherID	ntua
heal.numberOfPages	90 σ.	el
heal.fullTextAvailability	false