{"id":{"repo_id":"greece","oai_identifier":"oai:10442/0616"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/0616","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΔΥΝΑΤΟΤΗΤΕΣ ΕΦΑΡΜΟΓΗΣ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ ΣΤΗΝ ΑΝΑΛΥΣΗ ΜΗΧΑΝΟΛΟΓΙΚΩΝ ΚΑΤΑΣΚΕΥΩΝ","abstract":"IT IS PRESENTED A COMPLETE LITERATURE OF THE BOUNDARY INTEGRAL METHODS IN LAST 100 YEARS. INVESTIGATIONS OF THE BEM-FORMULATION IN ACOUSTICS, ON THE BASE OF THE WEIGHTED GALERKIN, ARE PRESENTED . IT IS PROVED, THAT THE BREBBIA-NARDINI METHODOLOGY, IN ELASTODYNAMICS AND ACOUSTICS, HAS MANY SHORTCOMINGS IF IT IS NOT POISSON-ADJUSTED. ON THE CONTRARY, THE PROPOSED CONSISTENT-MASS- FORMULATION INCLUDING INTERNAL DOF, WORKS EXTREMELY WELL. ALSO, IT IS PROPOSED A SYMMETRIZATION PROCEDURE OF THE BEM-FORMULATION WHICH IS ESPECIALLY IMPORTANT IN THE DYNAMIC ANALYSIS OF STRUCTURES. FINALLY, IT IS PRESENTED A NEW COMPLETE COMPUTER CODE(\"BESSY\") BASED ON THE DIRECT BEM-FORMULATION, WRITTEN IN PASCAL, WHICH IS WORKING IN PCS (IBM-COMPATIBLES). THIS CODE IS CAPABLE OF SOLVING INTERNAL AND EXTERNAL POTENTIAL AND ELASTODYNAMIC PROBLEMS.","abstract_html":"IT IS PRESENTED A COMPLETE LITERATURE OF THE BOUNDARY INTEGRAL METHODS IN LAST 100 YEARS. INVESTIGATIONS OF THE BEM-FORMULATION IN ACOUSTICS, ON THE BASE OF THE WEIGHTED GALERKIN, ARE PRESENTED . IT IS PROVED, THAT THE BREBBIA-NARDINI METHODOLOGY, IN ELASTODYNAMICS AND ACOUSTICS, HAS MANY SHORTCOMINGS IF IT IS NOT POISSON-ADJUSTED. ON THE CONTRARY, THE PROPOSED CONSISTENT-MASS- FORMULATION INCLUDING INTERNAL DOF, WORKS EXTREMELY WELL. ALSO, IT IS PROPOSED A SYMMETRIZATION PROCEDURE OF THE BEM-FORMULATION WHICH IS ESPECIALLY IMPORTANT IN THE DYNAMIC ANALYSIS OF STRUCTURES. FINALLY, IT IS PRESENTED A NEW COMPLETE COMPUTER CODE("BESSY") BASED ON THE DIRECT BEM-FORMULATION, WRITTEN IN PASCAL, WHICH IS WORKING IN PCS (IBM-COMPATIBLES). THIS CODE IS CAPABLE OF SOLVING INTERNAL AND EXTERNAL POTENTIAL AND ELASTODYNAMIC PROBLEMS.","abstract_has_math":false,"creators":["Προβατίδης, Χριστόφορος"],"institution":"Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1987,"date_issued":"1987","date_published":"1987","updated_at":"2026-07-24T02:25:21Z","subjects":["Acoustics","Boundary element method","DYNAMIC ANALYSIS OF STRUCTURES","Elastodynamics","Ακουστική","ΑΝΑΛΥΣΗ ΜΗΧΑΝΟΛΟΓΙΚΩΝ ΚΑΤΑΣΚΕΥΩΝ","Ελαστοδυναμική","Μέθοδος συνοριακών στοιχείων","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/0616"],"render_values":[{"text":"10.12681/eadd/0616","href":"https://doi.org/10.12681/eadd/0616","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/0616","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Προβατίδης, Χριστόφορος"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1987"]},{"key":"dc:publisher","label":"Institution","values":["Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)","National Technical University of Athens (NTUA)"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Acoustics","Boundary element method","DYNAMIC ANALYSIS OF STRUCTURES","Elastodynamics","Ακουστική","ΑΝΑΛΥΣΗ ΜΗΧΑΝΟΛΟΓΙΚΩΝ ΚΑΤΑΣΚΕΥΩΝ","Ελαστοδυναμική","Μέθοδος συνοριακών στοιχείων","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/0616","http://hdl.handle.net/10442/hedi/0616"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["IT IS PRESENTED A COMPLETE LITERATURE OF THE BOUNDARY INTEGRAL METHODS IN LAST 100 YEARS. INVESTIGATIONS OF THE BEM-FORMULATION IN ACOUSTICS, ON THE BASE OF THE WEIGHTED GALERKIN, ARE PRESENTED . IT IS PROVED, THAT THE BREBBIA-NARDINI METHODOLOGY, IN ELASTODYNAMICS AND ACOUSTICS, HAS MANY SHORTCOMINGS IF IT IS NOT POISSON-ADJUSTED. ON THE CONTRARY, THE PROPOSED CONSISTENT-MASS- FORMULATION INCLUDING INTERNAL DOF, WORKS EXTREMELY WELL. ALSO, IT IS PROPOSED A SYMMETRIZATION PROCEDURE OF THE BEM-FORMULATION WHICH IS ESPECIALLY IMPORTANT IN THE DYNAMIC ANALYSIS OF STRUCTURES. FINALLY, IT IS PRESENTED A NEW COMPLETE COMPUTER CODE(\"BESSY\") BASED ON THE DIRECT BEM-FORMULATION, WRITTEN IN PASCAL, WHICH IS WORKING IN PCS (IBM-COMPATIBLES). THIS CODE IS CAPABLE OF SOLVING INTERNAL AND EXTERNAL POTENTIAL AND ELASTODYNAMIC PROBLEMS.","ΑΦΟΥ ΠΑΡΟΥΣΙΑΣΤΕΙ ΜΙΑ ΠΛΗΡΗΣ ΒΙΒΛΙΟΓΡΑΦΙΚΗ ΚΑΤΑΓΡΑΦΗ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΟΛΟΚΛΗΡΩΤΙΚΩΝ ΜΕΘΟΔΩΝ ΤΗΝ ΤΕΛΕΥΤΑΙΑ ΕΚΑΤΟΝΤΑΕΤΗΡΙΔΑ, ΓΙΝΟΝΤΑΙ ΕΡΕΥΝΕΣ ΣΤΗΝ ΕΦΑΡΜΟΓΗ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ ΣΤΗΝ ΑΚΟΥΣΤΙΚΗ, ΚΑΤΩ ΑΠΟ ΤΟ ΠΡΙΣΜΑ ΤΗΣ ΜΕΘΟΔΟΥ GALERKIN . ΑΠΟΔΕΙΚΝΥΕΤΑΙ ΟΤΙ Η ΜΕΘΟΔΟΣ BREBBIA-NARDINI, ΕΛΑΣΤΟΔΥΝΑΜΙΚΗ ΚΑΙ ΑΚΟΥΣΤΙΚΗ, ΕΧΕΙ ΠΟΛΛΑ ΠΡΟΒΛΗΜΑΤΑ ΑΝ ΔΕΝ ΕΙΣΑΧΘΟΥΝ ΕΣΩΤΕΡΙΚΟΙ ΒΑΘΜΟΙ ΕΛΕΥΘΕΡΙΑΣ. Η ΠΡΟΤΕΙΝΟΜΕΝΗ ΜΕΘΟΔΟΣ ΤΗΣ ΣΥΜΒΑΤΗΣ ΜΑΖΑΣ, ΕΙΝΑΙ ΕΞΑΙΡΕΤΙΚΑ ΑΚΡΙΒΗΣ. ΕΠΙΣΗΣ, ΠΡΟΤΕΙΝΕΤΑΙ ΜΙΑ ΔΙΑΔΙΚΑΣΙΑ ΣΥΜΜΕΤΡΙΚΟΠΟΙΗΣΗΣ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ, ΠΟΥ ΕΙΝΑΙ ΜΕΓΑΛΟΥ ΕΝΔΙΑΦΕΡΟΝΤΟΣ ΣΤΗΝ ΔΥΝΑΜΙΚΗ ΑΝΑΛΥΣΗ ΚΑΤΑΣΚΕΥΩΝ. ΤΕΛΟΣ, ΠΑΡΟΥΣΙΑΖΕΤΑΙ ΕΝΑΣ ΠΛΗΡΗΣ ΥΠΟΛΟΓΙΣΜΟΣ ΚΩΔΙΚΑΣ ΓΙΑ ΤΗ ΜΕΘΟΔΟ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ, ΣΕ ΓΛΩΣΣΑ PASCAL, ΓΡΑΜΜΕΝΟΣ ΓΙΑ ΠΡΟΣΩΠΙΚΟΥΣ ΥΠΟΛΟΓΙΣΤΕΣ (PCS). Ο ΚΩΔΙΚΑΣ ΑΥΤΟΣ ΕΙΝΑΙ ΚΑΤΑΛΛΗΛΟΣ ΝΑ ΕΠΙΛΥΕΙ ΕΣΩΤΕΡΙΚΑ ΚΑΙ ΕΞΩΤΕΡΙΚΑ ΠΡΟΒΛΗΜΑΤΑ ΔΥΝΑΜΙΚΟΥ ΚΑΙ ΕΛΑΣΤΟΣΤΑΤΙΚΗΣ."]},{"key":"dc:title","label":"Title","values":["ΔΥΝΑΤΟΤΗΤΕΣ ΕΦΑΡΜΟΓΗΣ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ ΣΤΗΝ ΑΝΑΛΥΣΗ ΜΗΧΑΝΟΛΟΓΙΚΩΝ ΚΑΤΑΣΚΕΥΩΝ","ON THE APPLICATION OF THE BOUNDARY ELEMENT METHOD IN THE ANALYSIS OF DYNAMIC PROBLEMS"]}]}],"canonical_facts":{"dc:creator":["Προβατίδης, Χριστόφορος"],"dc:date":["1987"],"dc:description":["IT IS PRESENTED A COMPLETE LITERATURE OF THE BOUNDARY INTEGRAL METHODS IN LAST 100 YEARS. INVESTIGATIONS OF THE BEM-FORMULATION IN ACOUSTICS, ON THE BASE OF THE WEIGHTED GALERKIN, ARE PRESENTED . IT IS PROVED, THAT THE BREBBIA-NARDINI METHODOLOGY, IN ELASTODYNAMICS AND ACOUSTICS, HAS MANY SHORTCOMINGS IF IT IS NOT POISSON-ADJUSTED. ON THE CONTRARY, THE PROPOSED CONSISTENT-MASS- FORMULATION INCLUDING INTERNAL DOF, WORKS EXTREMELY WELL. ALSO, IT IS PROPOSED A SYMMETRIZATION PROCEDURE OF THE BEM-FORMULATION WHICH IS ESPECIALLY IMPORTANT IN THE DYNAMIC ANALYSIS OF STRUCTURES. FINALLY, IT IS PRESENTED A NEW COMPLETE COMPUTER CODE(\"BESSY\") BASED ON THE DIRECT BEM-FORMULATION, WRITTEN IN PASCAL, WHICH IS WORKING IN PCS (IBM-COMPATIBLES). THIS CODE IS CAPABLE OF SOLVING INTERNAL AND EXTERNAL POTENTIAL AND ELASTODYNAMIC PROBLEMS.","ΑΦΟΥ ΠΑΡΟΥΣΙΑΣΤΕΙ ΜΙΑ ΠΛΗΡΗΣ ΒΙΒΛΙΟΓΡΑΦΙΚΗ ΚΑΤΑΓΡΑΦΗ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΟΛΟΚΛΗΡΩΤΙΚΩΝ ΜΕΘΟΔΩΝ ΤΗΝ ΤΕΛΕΥΤΑΙΑ ΕΚΑΤΟΝΤΑΕΤΗΡΙΔΑ, ΓΙΝΟΝΤΑΙ ΕΡΕΥΝΕΣ ΣΤΗΝ ΕΦΑΡΜΟΓΗ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ ΣΤΗΝ ΑΚΟΥΣΤΙΚΗ, ΚΑΤΩ ΑΠΟ ΤΟ ΠΡΙΣΜΑ ΤΗΣ ΜΕΘΟΔΟΥ GALERKIN . ΑΠΟΔΕΙΚΝΥΕΤΑΙ ΟΤΙ Η ΜΕΘΟΔΟΣ BREBBIA-NARDINI, ΕΛΑΣΤΟΔΥΝΑΜΙΚΗ ΚΑΙ ΑΚΟΥΣΤΙΚΗ, ΕΧΕΙ ΠΟΛΛΑ ΠΡΟΒΛΗΜΑΤΑ ΑΝ ΔΕΝ ΕΙΣΑΧΘΟΥΝ ΕΣΩΤΕΡΙΚΟΙ ΒΑΘΜΟΙ ΕΛΕΥΘΕΡΙΑΣ. Η ΠΡΟΤΕΙΝΟΜΕΝΗ ΜΕΘΟΔΟΣ ΤΗΣ ΣΥΜΒΑΤΗΣ ΜΑΖΑΣ, ΕΙΝΑΙ ΕΞΑΙΡΕΤΙΚΑ ΑΚΡΙΒΗΣ. ΕΠΙΣΗΣ, ΠΡΟΤΕΙΝΕΤΑΙ ΜΙΑ ΔΙΑΔΙΚΑΣΙΑ ΣΥΜΜΕΤΡΙΚΟΠΟΙΗΣΗΣ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ, ΠΟΥ ΕΙΝΑΙ ΜΕΓΑΛΟΥ ΕΝΔΙΑΦΕΡΟΝΤΟΣ ΣΤΗΝ ΔΥΝΑΜΙΚΗ ΑΝΑΛΥΣΗ ΚΑΤΑΣΚΕΥΩΝ. ΤΕΛΟΣ, ΠΑΡΟΥΣΙΑΖΕΤΑΙ ΕΝΑΣ ΠΛΗΡΗΣ ΥΠΟΛΟΓΙΣΜΟΣ ΚΩΔΙΚΑΣ ΓΙΑ ΤΗ ΜΕΘΟΔΟ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ, ΣΕ ΓΛΩΣΣΑ PASCAL, ΓΡΑΜΜΕΝΟΣ ΓΙΑ ΠΡΟΣΩΠΙΚΟΥΣ ΥΠΟΛΟΓΙΣΤΕΣ (PCS). Ο ΚΩΔΙΚΑΣ ΑΥΤΟΣ ΕΙΝΑΙ ΚΑΤΑΛΛΗΛΟΣ ΝΑ ΕΠΙΛΥΕΙ ΕΣΩΤΕΡΙΚΑ ΚΑΙ ΕΞΩΤΕΡΙΚΑ ΠΡΟΒΛΗΜΑΤΑ ΔΥΝΑΜΙΚΟΥ ΚΑΙ ΕΛΑΣΤΟΣΤΑΤΙΚΗΣ."],"dc:identifier":["10.12681/eadd/0616","http://hdl.handle.net/10442/hedi/0616"],"dc:language":["gre"],"dc:publisher":["Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)","National Technical University of Athens (NTUA)"],"dc:subject":["Acoustics","Boundary element method","DYNAMIC ANALYSIS OF STRUCTURES","Elastodynamics","Ακουστική","ΑΝΑΛΥΣΗ ΜΗΧΑΝΟΛΟΓΙΚΩΝ ΚΑΤΑΣΚΕΥΩΝ","Ελαστοδυναμική","Μέθοδος συνοριακών στοιχείων","Engineering and Technology","Mechanical Engineering","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Μηχανολόγου Μηχανικού"],"dc:title":["ΔΥΝΑΤΟΤΗΤΕΣ ΕΦΑΡΜΟΓΗΣ ΤΗΣ ΜΕΘΟΔΟΥ ΤΩΝ ΣΥΝΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ ΣΤΗΝ ΑΝΑΛΥΣΗ ΜΗΧΑΝΟΛΟΓΙΚΩΝ ΚΑΤΑΣΚΕΥΩΝ","ON THE APPLICATION OF THE BOUNDARY ELEMENT METHOD IN THE ANALYSIS OF DYNAMIC PROBLEMS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:25:21Z"}