Contribution to vibration isolation of wind turbine towers

Καπασακάλης, Κωνσταντίνος; Kapasakalis, Konstantinos

dc.contributor.author	Καπασακάλης, Κωνσταντίνος	el
dc.contributor.author	Kapasakalis, Konstantinos	en
dc.date.accessioned	2017-11-09T11:48:54Z
dc.date.available	2017-11-09T11:48:54Z
dc.date.issued	2017-11-09
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/45900
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.7411
dc.description	Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Δομοστατικός Σχεδιασμός και Ανάλυση των Κατασκευών”	el
dc.rights	Default License
dc.subject	Ταλαντώσεις	el
dc.subject	Μόνωση	el
dc.subject	Απόσβεση	el
dc.subject	Αρνητική στιβαρότητα	el
dc.subject	Wind turbine towers	en
dc.subject	Oscillations	en
dc.subject	Insulation	en
dc.title	Contribution to vibration isolation of wind turbine towers	en
dc.title	Συμβολή στη μόνωση ταλαντώσεων σε ανεμογεννήτριες	el
heal.type	masterThesis
heal.classification	ΣΤΑΤΙΚΗ ΚΑΙ ΔΥΝΑΜΙΚΗ ΑΝΑΛΥΣΗ ΤΩΝ ΚΑΤΑΣΚΕΥΩΝ	el
heal.classificationURI	http://data.seab.gr/concepts/2a80a2e119d24970988f906c4e19065d9d4f9dce
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2017-07-11
heal.abstract	The subject of this master thesis is the study of the dynamic behavior of wind turbines under seismic and wind loads. More specifically, the critical factor for the function of wind turbines is fatigue, both for the wind turbine tower and for the foundation. The fatigue is directly related to the stress of the tower, the foundation and the dynamic response of the wind turbine. The purpose of this master thesis is the investigation of the influence that the isolation systems have, in the degradation of the response of the structure, under dymanic loads. The isolation systems that are taken into consideration are the classical Tuned Mass Damper, in various implementations, and a novel passive vibration isolation system the KDamper, which incorporates negative stiffness elements in the classical Tuned Mass Damper isolation system. As an introduction to the subject, a brief review in the types of wind turbines and the influence they have in the modern world is presented in Chapter 1. In the second chapter of the thesis, a bibliographic review on the passive isolation systems of Tuned Mass Damper and KDamper is presented. Subsequently, the outline of these isolation systems is presented and the equations that consider a Single Degree of Freedom system combined with the respective isolation system, are formed, and a comparison between them is made after the optimization of their parameters. In the 3rd Chapter, the modeling of the wind turbine tower is described, in the MATLAB environment, for the case of the uncontrolled wind turbine tower and for every implementation of the respective isolation system that is considered. In Chapter 4, the results of the dynamic parametric analysis of the wind turbine tower are being compared for every dynamic load and isolation system that were tested. The factors that were considered critical for this thesis, are the displacement of the top of the tower, because it is closely related to the manifested forces and the fatigue they result in, and the relative displacement of the top of the tower and the isolation system.	en
heal.advisorName	Σαμπουντζάκης, Ευάγγελος	el
heal.committeeMemberName	Σαμπουντζάκης, Ευάγγελος	el
heal.committeeMemberName	Αντωνιάδης, Ιωάννης	el
heal.committeeMemberName	Τσιάτας, Γεωργίος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Πολιτικών Μηχανικών. Τομέας Δομοστατικής. Εργαστήριο Στατικής και Αντισεισμικών Ερευνών	el
heal.academicPublisherID	ntua
heal.numberOfPages	88 σ.	el
heal.fullTextAvailability	true