• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 454
  • 96
  • 70
  • 59
  • 43
  • 13
  • 9
  • 9
  • 9
  • 7
  • 6
  • 4
  • 3
  • 3
  • 3
  • Tagged with
  • 967
  • 231
  • 223
  • 209
  • 139
  • 109
  • 104
  • 91
  • 79
  • 74
  • 73
  • 73
  • 72
  • 71
  • 71
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
261

Seismic analysis, design, and evaluation of post-tensioned friction damped connections for steel moment resisting frames /

Rojas Cruz, Pedro Pablo, January 2003 (has links)
Thesis (Ph. D.)--Lehigh University, 2003. / Includes vita. In two parts. Includes bibliographical references (leaves 598-603).
262

Passive rotational damping in flapping flight

Cheng, Bo. January 2009 (has links)
Thesis (M.S.M.E.)--University of Delaware, 2009. / Principal faculty advisor: Xinyan Deng, Dept. of Mechanical Engineering. Includes bibliographical references.
263

Evaluating the effectiveness of two Trichoderma species as biological control agents against damping-off caused by Pythium aphanidermatum (Edson) Fitzp. in cucumber seedlings and microgreen table beets

Collins, Christine Meredith. January 2009 (has links)
Thesis (M.S.)--University of Delaware, 2009. / Principal faculty advisor: Wallace G. Pill, Dept. of Plant & Soil Sciences. Includes bibliographical references.
264

Effects of baffles on damping lateral fluid sloshing oscillations in tanker trucks

Tanugula, Rohit. January 2001 (has links)
Thesis (M.S.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains xiv, 97 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 90-92).
265

Gravitational radiation damping and the three-body problem /

Wardell, Zachary, January 2003 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 62-63). Also available on the Internet.
266

Determinig dynamic properties of elastic coupling using experimental data and finite element analysis

Davis, Roosevelt. January 2003 (has links)
Thesis (M.S.)--Mississippi State University. Department of Mechanical Engineering. / Title from title screen. Includes bibliographical references.
267

Coextrusion : a feasible method to manufacture negative stiffness inclusions

Hook, Daniel Taylor 15 November 2013 (has links)
This work demonstrates the effectiveness of coextrusion as a method to manufacture negative stiffness inclusions for use in vibrational damping applications. The theory and mechanics of negative stiffness and coextrusion are introduced and the process of creating and extruding a feed rod with negative stiffness architecture explained. Coextrusion is shown to be a viable method to create negative stiffness inclusions / text
268

Ισοδύναμη ιξώδης απόσβεση για ανελαστική σεισμική ανάλυση μεταλλικών πλαισίων μέσω ελαστικής δυναμικής φασματικής ανάλυσης

Κωνσταντακόπουλος, Ιωάννης 30 April 2014 (has links)
Στην παρούσα διατριβή παρουσιάζονται τα αποτελέσματα μιας εκτεταμένης διερεύνησης της ανελαστικής συμπεριφοράς επίπεδων μεταλλικών καμπτικών πλαισίων. Η διερεύνηση περιλαμβάνει 36 συνολικά πλαίσια με διαφορετικές ιδιότητες, όπως αριθμός ανοιγμάτων και ορόφων τα οποία τα οποία αναλύονται με βηματικές δυναμικές ανελαστικές αναλύσεις για 20 σεισμικές κινήσεις προκειμένου να καθοριστεί η απόκριση τους (μετακινήσεις και τέμνουσα βάσης) στα συγκεκριμένα ανελαστικά επίπεδα βλάβης, που καθορίζουν οι αντισεισμικοί κανονισμοί παγκοσμίως. Έπειτα υπολογίζεται ο κατάλληλος συντελεστής ιξώδους απόσβεσης ίδιος για όλες τις πρώτες ιδιομορφές ώστε με χρήση ελαστικής φασματικής ανάλυσης των πλαισίων να δίνει τα ίδια αποτελέσματα σε επίπεδο δυνάμεων με αυτά της ανελαστικής. Αυτό απαιτεί την κατασκευή φασμάτων σχεδιασμού με υψηλές τιμές ιξώδους απόσβεση. Τέλος παρουσιάζονται εμπειρικοί τύποι υπολογισμού αυτού του συντελεστή απόσβεσης για κάθε κτήριο και κάθε επίπεδο επιτελεστικότητας προς διευκόλυνση του μηχανικού. / This thesis presents the results of an extensive investigation of the nonlinear behavior of steel bending frames. The investigation includes a number of 36 frames with different properties, such as number of openings and floors which are analyzed by step by step dynamic inelastic analysis for 20 seismic movements in order to determine their response (movement and base shear) in particular inelastic damage levels, which determine the Seismic Codes. Furthermore, the appropriate damping rate, which is the same for all the first modes, was calculated using spectral analysis of elastic frames with the purpose of giving the same results at the level of forces are inelastic . This requires the construction of design spectra with high damping. Finally it is presented empirical formulas of calculating the daming ratio for each building and each performance level to facilitate engineers.
269

AGEING EFFECTS ON HIGH DAMPING BRIDGE RUBBER BEARING

Itoh, Yoshito, Gu, Haosheng 09 1900 (has links)
No description available.
270

An analysis of the flutter and damping characteristics of helicopter rotors

Viswanathan, Sathy Padmanaban 05 1900 (has links)
No description available.

Page generated in 0.426 seconds