{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/3622"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/3622","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Equilíbrio e vibrações induzidas por vórtices de \"risers\" de perfuração","abstract":"Presents a study about drilling risers used by semisubmersible platforms in order to drill wells in deep waters. Firstly, a study about static equilibrium is presented. This allows to select adequate risers for places with usual natural conditions. The selection takes into account the riser tension, the natural ·conditions and the pertinent drilling parameters. Then, a brief study about free vibrations is presented. Finally, the analysis of transverse vibrations induced by vortex-shedding is dane. These vibrations can occur in places of strong marine currents. The mathematical model was postulated by Skop and Griffin and its solution was dane by the normal form method. The proposed method allows the construction of the riser frequency response near a resonance condition.","abstract_html":"Presents a study about drilling risers used by semisubmersible platforms in order to drill wells in deep waters. Firstly, a study about static equilibrium is presented. This allows to select adequate risers for places with usual natural conditions. The selection takes into account the riser tension, the natural ·conditions and the pertinent drilling parameters. Then, a brief study about free vibrations is presented. Finally, the analysis of transverse vibrations induced by vortex-shedding is dane. These vibrations can occur in places of strong marine currents. The mathematical model was postulated by Skop and Griffin and its solution was dane by the normal form method. The proposed method allows the construction of the riser frequency response near a resonance condition.","abstract_has_math":false,"creators":["Farias, Francisco Mourão"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Hsu, Liu"],"committee_chairs":[],"committee_members":[],"year":1980,"date_issued":"1980-12","date_published":"1980-12","updated_at":"2026-07-24T01:16:07Z","subjects":["Vórtices dos fluídos","Perfuração de poços","Estruturas offshore","Petróleo"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/3622","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Hsu, Liu"]},{"key":"dc:creator","label":"Author","values":["Farias, Francisco Mourão"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-02-19T18:32:03Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:04:34Z"]},{"key":"dc:date.issued","label":"Date","values":["1980-12"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Vórtices dos fluídos","Perfuração de poços","Estruturas offshore","Petróleo"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/3622"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Presents a study about drilling risers used by semisubmersible platforms in order to drill wells in deep waters. Firstly, a study about static equilibrium is presented. This allows to select adequate risers for places with usual natural conditions. The selection takes into account the riser tension, the natural ·conditions and the pertinent drilling parameters. Then, a brief study about free vibrations is presented. Finally, the analysis of transverse vibrations induced by vortex-shedding is dane. These vibrations can occur in places of strong marine currents. The mathematical model was postulated by Skop and Griffin and its solution was dane by the normal form method. The proposed method allows the construction of the riser frequency response near a resonance condition."]},{"key":"dc:title","label":"Title","values":["Equilíbrio e vibrações induzidas por vórtices de \"risers\" de perfuração"]}]}],"canonical_facts":{"dc:contributor.advisor":["Hsu, Liu"],"dc:creator":["Farias, Francisco Mourão"],"dc:date.accessioned":["2018-02-19T18:32:03Z"],"dc:date.available":["2026-05-16T03:04:34Z"],"dc:date.issued":["1980-12"],"dc:description.abstract":["Presents a study about drilling risers used by semisubmersible platforms in order to drill wells in deep waters. Firstly, a study about static equilibrium is presented. This allows to select adequate risers for places with usual natural conditions. The selection takes into account the riser tension, the natural ·conditions and the pertinent drilling parameters. Then, a brief study about free vibrations is presented. Finally, the analysis of transverse vibrations induced by vortex-shedding is dane. These vibrations can occur in places of strong marine currents. The mathematical model was postulated by Skop and Griffin and its solution was dane by the normal form method. The proposed method allows the construction of the riser frequency response near a resonance condition."],"dc:identifier.uri":["http://hdl.handle.net/11422/3622"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Vórtices dos fluídos","Perfuração de poços","Estruturas offshore","Petróleo"],"dc:title":["Equilíbrio e vibrações induzidas por vórtices de \"risers\" de perfuração"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:07Z"}