{"id":{"repo_id":"greece","oai_identifier":"oai:10442/1532"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/1532","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΔΥΝΑΜΙΚΗ ΤΩΝ ΡΗΓΜΑΤΩΜΕΝΩΝ ΔΟΚΩΝ ΣΤΟ ΝΕΡΟ","abstract":"THE NATURAL FREQUENCIES AND THE CORRECTION COEFFICIENT Z FOR THE THREDIMENSIONAL FLOW WERE COMPUTED. THIS WAS ACCOMPLISHED WITH TIMOSHENKO BEAM THEORY, ANALYTICALLY AND WITH ONE DIMENSION FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH LOCAL COMPLIANCE COEFFICIENTS. ALSO WAS ACCOMPLISHED, BY THEORY OF ELASTICITY WITH PLAIN STRESS QUADRILATERAL FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH THE CONCEPT OF CRACKED NODE. FOR THE FLUID THE ADDED MASS MATRIX IS COMPUTED BY THE BOUNDARY ELEMENT METHOD OF SOURCES. ALSO WAS COMPUTED, THE LOCAL COMPLIANCE COEFFICIENT IN BENDING, FOR HOLLOW ORTHOGONAL BEAMS.","abstract_html":"THE NATURAL FREQUENCIES AND THE CORRECTION COEFFICIENT Z FOR THE THREDIMENSIONAL FLOW WERE COMPUTED. THIS WAS ACCOMPLISHED WITH TIMOSHENKO BEAM THEORY, ANALYTICALLY AND WITH ONE DIMENSION FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH LOCAL COMPLIANCE COEFFICIENTS. ALSO WAS ACCOMPLISHED, BY THEORY OF ELASTICITY WITH PLAIN STRESS QUADRILATERAL FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH THE CONCEPT OF CRACKED NODE. FOR THE FLUID THE ADDED MASS MATRIX IS COMPUTED BY THE BOUNDARY ELEMENT METHOD OF SOURCES. ALSO WAS COMPUTED, THE LOCAL COMPLIANCE COEFFICIENT IN BENDING, FOR HOLLOW ORTHOGONAL BEAMS.","abstract_has_math":false,"creators":["Γούναρης, Γεώργιος","Gounaris, Georgios"],"institution":"Πανεπιστήμιο Πατρών","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1991,"date_issued":"1991","date_published":"1991","updated_at":"2026-07-24T02:24:59Z","subjects":["ADDED MASS-Z COEFFICIENT","CRACKED FINITE ELEMENT-TIMOSHENKO BEAM","HYDROELASTICITY+FRACTURE MECHANICS","LOCAL COMPLIANCE COEFFICIENT","NATURAL FREQUENCIES","PLAIN STRESS FINITE ELEMENT-CRACKED NODE","ΓΗΓΜΑΤΩΜΕΝΟ ΠΕΠΕΡΑΣΜΕΝΟ ΣΤΟΙΧΕΙΟ","Δοκός Timoshenko","ΕΠΙΠΕΔΟ ΠΕΠΕΡΑΣΜΕΝΟ ΣΤΟΙΧΕΙΟ","Ιδιοσυχνότητες","ΠΡΟΣΤΙΘΕΜΕΝΗ ΜΑΖΑ-ΣΥΝΤΕΛΕΣΤΗΣ Ζ","ΡΗΓΜΑΤΩΜΕΝΟΣ ΚΟΜΒΟΣ","ΣΥΝΤΕΛΕΣΤΗΣ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ","ΥΔΡΟΕΛΑΣΤΙΚΟΤΗΣ + ΘΡΑΥΣΤΟ ΜΗΧΑΝΙΚΗ","Engineering and Technology","Mechanical Engineering","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Μηχανολόγου Μηχανικού"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1532"],"render_values":[{"text":"10.12681/eadd/1532","href":"https://doi.org/10.12681/eadd/1532","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/1532","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Γούναρης, Γεώργιος","Gounaris, Georgios"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1991"]},{"key":"dc:publisher","label":"Institution","values":["Πανεπιστήμιο Πατρών","University of Patras"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ADDED MASS-Z COEFFICIENT","CRACKED FINITE ELEMENT-TIMOSHENKO BEAM","HYDROELASTICITY+FRACTURE MECHANICS","LOCAL COMPLIANCE COEFFICIENT","NATURAL FREQUENCIES","PLAIN STRESS FINITE ELEMENT-CRACKED NODE","ΓΗΓΜΑΤΩΜΕΝΟ ΠΕΠΕΡΑΣΜΕΝΟ ΣΤΟΙΧΕΙΟ","Δοκός Timoshenko","ΕΠΙΠΕΔΟ ΠΕΠΕΡΑΣΜΕΝΟ ΣΤΟΙΧΕΙΟ","Ιδιοσυχνότητες","ΠΡΟΣΤΙΘΕΜΕΝΗ ΜΑΖΑ-ΣΥΝΤΕΛΕΣΤΗΣ Ζ","ΡΗΓΜΑΤΩΜΕΝΟΣ ΚΟΜΒΟΣ","ΣΥΝΤΕΛΕΣΤΗΣ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ","ΥΔΡΟΕΛΑΣΤΙΚΟΤΗΣ + ΘΡΑΥΣΤΟ ΜΗΧΑΝΙΚΗ","Engineering and Technology","Mechanical Engineering","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Μηχανολόγου Μηχανικού"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1532","http://hdl.handle.net/10442/hedi/1532"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["THE NATURAL FREQUENCIES AND THE CORRECTION COEFFICIENT Z FOR THE THREDIMENSIONAL FLOW WERE COMPUTED. THIS WAS ACCOMPLISHED WITH TIMOSHENKO BEAM THEORY, ANALYTICALLY AND WITH ONE DIMENSION FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH LOCAL COMPLIANCE COEFFICIENTS. ALSO WAS ACCOMPLISHED, BY THEORY OF ELASTICITY WITH PLAIN STRESS QUADRILATERAL FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH THE CONCEPT OF CRACKED NODE. FOR THE FLUID THE ADDED MASS MATRIX IS COMPUTED BY THE BOUNDARY ELEMENT METHOD OF SOURCES. ALSO WAS COMPUTED, THE LOCAL COMPLIANCE COEFFICIENT IN BENDING, FOR HOLLOW ORTHOGONAL BEAMS.","ΥΠΟΛΟΓΙΣΜΟΣ ΙΔΙΟΣΥΧΝΟΤΗΤΩΝ ΚΑΙ ΔΙΟΡΘΩΤΙΚΩΝ ΣΥΝΤΕΛΕΣΤΩΝ Ζ ΓΙΑ ΤΟ ΤΡΙΣΔΙΑΣΤΑΤΟ ΤΗΣ ΡΟΗΣ. ΕΠΕΤΕΥΧΘΗ ΔΙΑ ΤΗΣ ΘΕΩΡΙΑΣ ΔΟΚΟΥ TIMOSHENKO, ΑΝΑΛΥΤΙΚΑ ΚΑΙ ΜΕ ΜΟΝΟΔΙΑΣΤΑΤΑ ΠΕΠΕΡΑΣΜΕΝΑ ΣΤΟΙΧΕΙΑ ΕΙΣΑΓΟΝΤΑΣ ΤΗ ΡΩΓΜΗ ΔΙΑ ΤΩΝ ΣΥΝΤΕΛΕΣΤΩΝ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ. ΕΠΙΣΗΣ ΕΠΕΤΕΥΧΘΗ ΔΙΑ ΤΗΣ ΘΕΩΡΙΑΣ ΕΠΙΠΕΔΗΣ ΕΛΑΣΤΙΚΟΤΗΤΑΣ, ΤΕΤΡΑΠΛΕΥΡΑ ΠΕΠΕΡΑΣΜΕΝΑ ΣΤΟΙΧΕΙΑ, ΕΙΣΑΓΟΝΤΑΣ ΤΗΝ ΕΠΙΔΡΑΣΗ ΤΗΣ ΡΩΓΜΗΣ ΔΙΑ ΤΗΣ ΕΝΝΟΙΑΣ ΤΟΥ ΡΗΓΜΑΤΩΜΕΝΟΥ ΚΟΜΒΟΥ. ΓΙΑ ΤΟ ΝΕΡΟ ΤΟ ΜΗΤΡΩΟ ΠΡΟΣΤΙΘΕΜΕΝΗΣ ΜΑΖΑΣ ΥΠΟΛΟΓΙΣΤΗΚΕ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΩΝ ΠΗΓΩΝ ΜΕ ΣΥΝΟΡΙΑΚΑ ΣΤΟΙΧΕΙΑ. ΥΠΟΛΟΓΙΣΤΗΚΕ ΕΠΙΣΗΣ, Ο ΣΥΝΤΕΛΕΣΤΗΣ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ ΣΕ ΚΑΜΨΗ, ΓΙΑ ΔΟΚΟ ΚΕΛΥΦΟΕΙΔΟΥΣ ΟΡΘΟΓΩΝΙΚΗΣ ΔΙΑΤΟΜΗΣ."]},{"key":"dc:title","label":"Title","values":["ΔΥΝΑΜΙΚΗ ΤΩΝ ΡΗΓΜΑΤΩΜΕΝΩΝ ΔΟΚΩΝ ΣΤΟ ΝΕΡΟ","DYNAMIC OF CRACKED BEAMS IN WATER"]}]}],"canonical_facts":{"dc:creator":["Γούναρης, Γεώργιος","Gounaris, Georgios"],"dc:date":["1991"],"dc:description":["THE NATURAL FREQUENCIES AND THE CORRECTION COEFFICIENT Z FOR THE THREDIMENSIONAL FLOW WERE COMPUTED. THIS WAS ACCOMPLISHED WITH TIMOSHENKO BEAM THEORY, ANALYTICALLY AND WITH ONE DIMENSION FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH LOCAL COMPLIANCE COEFFICIENTS. ALSO WAS ACCOMPLISHED, BY THEORY OF ELASTICITY WITH PLAIN STRESS QUADRILATERAL FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH THE CONCEPT OF CRACKED NODE. FOR THE FLUID THE ADDED MASS MATRIX IS COMPUTED BY THE BOUNDARY ELEMENT METHOD OF SOURCES. ALSO WAS COMPUTED, THE LOCAL COMPLIANCE COEFFICIENT IN BENDING, FOR HOLLOW ORTHOGONAL BEAMS.","ΥΠΟΛΟΓΙΣΜΟΣ ΙΔΙΟΣΥΧΝΟΤΗΤΩΝ ΚΑΙ ΔΙΟΡΘΩΤΙΚΩΝ ΣΥΝΤΕΛΕΣΤΩΝ Ζ ΓΙΑ ΤΟ ΤΡΙΣΔΙΑΣΤΑΤΟ ΤΗΣ ΡΟΗΣ. ΕΠΕΤΕΥΧΘΗ ΔΙΑ ΤΗΣ ΘΕΩΡΙΑΣ ΔΟΚΟΥ TIMOSHENKO, ΑΝΑΛΥΤΙΚΑ ΚΑΙ ΜΕ ΜΟΝΟΔΙΑΣΤΑΤΑ ΠΕΠΕΡΑΣΜΕΝΑ ΣΤΟΙΧΕΙΑ ΕΙΣΑΓΟΝΤΑΣ ΤΗ ΡΩΓΜΗ ΔΙΑ ΤΩΝ ΣΥΝΤΕΛΕΣΤΩΝ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ. ΕΠΙΣΗΣ ΕΠΕΤΕΥΧΘΗ ΔΙΑ ΤΗΣ ΘΕΩΡΙΑΣ ΕΠΙΠΕΔΗΣ ΕΛΑΣΤΙΚΟΤΗΤΑΣ, ΤΕΤΡΑΠΛΕΥΡΑ ΠΕΠΕΡΑΣΜΕΝΑ ΣΤΟΙΧΕΙΑ, ΕΙΣΑΓΟΝΤΑΣ ΤΗΝ ΕΠΙΔΡΑΣΗ ΤΗΣ ΡΩΓΜΗΣ ΔΙΑ ΤΗΣ ΕΝΝΟΙΑΣ ΤΟΥ ΡΗΓΜΑΤΩΜΕΝΟΥ ΚΟΜΒΟΥ. ΓΙΑ ΤΟ ΝΕΡΟ ΤΟ ΜΗΤΡΩΟ ΠΡΟΣΤΙΘΕΜΕΝΗΣ ΜΑΖΑΣ ΥΠΟΛΟΓΙΣΤΗΚΕ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΩΝ ΠΗΓΩΝ ΜΕ ΣΥΝΟΡΙΑΚΑ ΣΤΟΙΧΕΙΑ. ΥΠΟΛΟΓΙΣΤΗΚΕ ΕΠΙΣΗΣ, Ο ΣΥΝΤΕΛΕΣΤΗΣ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ ΣΕ ΚΑΜΨΗ, ΓΙΑ ΔΟΚΟ ΚΕΛΥΦΟΕΙΔΟΥΣ ΟΡΘΟΓΩΝΙΚΗΣ ΔΙΑΤΟΜΗΣ."],"dc:identifier":["10.12681/eadd/1532","http://hdl.handle.net/10442/hedi/1532"],"dc:language":["gre"],"dc:publisher":["Πανεπιστήμιο Πατρών","University of Patras"],"dc:subject":["ADDED MASS-Z COEFFICIENT","CRACKED FINITE ELEMENT-TIMOSHENKO BEAM","HYDROELASTICITY+FRACTURE MECHANICS","LOCAL COMPLIANCE COEFFICIENT","NATURAL FREQUENCIES","PLAIN STRESS FINITE ELEMENT-CRACKED NODE","ΓΗΓΜΑΤΩΜΕΝΟ ΠΕΠΕΡΑΣΜΕΝΟ ΣΤΟΙΧΕΙΟ","Δοκός Timoshenko","ΕΠΙΠΕΔΟ ΠΕΠΕΡΑΣΜΕΝΟ ΣΤΟΙΧΕΙΟ","Ιδιοσυχνότητες","ΠΡΟΣΤΙΘΕΜΕΝΗ ΜΑΖΑ-ΣΥΝΤΕΛΕΣΤΗΣ Ζ","ΡΗΓΜΑΤΩΜΕΝΟΣ ΚΟΜΒΟΣ","ΣΥΝΤΕΛΕΣΤΗΣ ΤΟΠΙΚΗΣ ΕΝΔΟΤΙΚΟΤΗΤΑΣ","ΥΔΡΟΕΛΑΣΤΙΚΟΤΗΣ + ΘΡΑΥΣΤΟ ΜΗΧΑΝΙΚΗ","Engineering and Technology","Mechanical Engineering","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Μηχανολόγου Μηχανικού"],"dc:title":["ΔΥΝΑΜΙΚΗ ΤΩΝ ΡΗΓΜΑΤΩΜΕΝΩΝ ΔΟΚΩΝ ΣΤΟ ΝΕΡΟ","DYNAMIC OF CRACKED BEAMS IN WATER"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:24:59Z"}