{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/3381"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/3381","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Aplicabilidade de uma máquina teste eletrodinâmica a molas não lineares","abstract":"An eletrodynamic system for testing fatigue in springs is represented by a model which has two degrees of freedom. The simulation of the tester by a two degrees af freedom system with restoring force F =(α+βx²)x is made on an analog computer EAI – TR48 DES – 30. The favorable values of the spring deflection ratio y1 /(y2 - y1) the frequency of the exciting force, and y2 the amplitude of motion of the mass m2, as function of the mass ratio m2/m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = O). The favorable values of the spring deflection ratio y1 /(y2 - y1), the frequency of the exciting force, and y2 the amplitude ofmotion of the mass m2, as function of the mass ratio m2 /m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = 0).","abstract_html":"An eletrodynamic system for testing fatigue in springs is represented by a model which has two degrees of freedom. The simulation of the tester by a two degrees af freedom system with restoring force F =(α+βx²)x is made on an analog computer EAI – TR48 DES – 30. The favorable values of the spring deflection ratio y1 /(y2 - y1) the frequency of the exciting force, and y2 the amplitude of motion of the mass m2, as function of the mass ratio m2/m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = O). The favorable values of the spring deflection ratio y1 /(y2 - y1), the frequency of the exciting force, and y2 the amplitude ofmotion of the mass m2, as function of the mass ratio m2 /m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = 0).","abstract_has_math":false,"creators":["Bastos, Leopoldo Eurico Gonçalves"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Ripper Neto, Arthur Palmeira"],"committee_chairs":[],"committee_members":[],"year":1969,"date_issued":"1969-10","date_published":"1969-10","updated_at":"2026-07-24T01:16:01Z","subjects":["Modelos não lineares","Dinâmica","Vibrações"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/3381","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Ripper Neto, Arthur Palmeira"]},{"key":"dc:creator","label":"Author","values":["Bastos, Leopoldo Eurico Gonçalves"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-01-03T16:53:03Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:04:24Z"]},{"key":"dc:date.issued","label":"Date","values":["1969-10"]},{"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":["Modelos não lineares","Dinâmica","Vibrações"]}]},{"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/11422/3381"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["An eletrodynamic system for testing fatigue in springs is represented by a model which has two degrees of freedom. The simulation of the tester by a two degrees af freedom system with restoring force F =(α+βx²)x is made on an analog computer EAI – TR48 DES – 30. The favorable values of the spring deflection ratio y1 /(y2 - y1) the frequency of the exciting force, and y2 the amplitude of motion of the mass m2, as function of the mass ratio m2/m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = O). The favorable values of the spring deflection ratio y1 /(y2 - y1), the frequency of the exciting force, and y2 the amplitude ofmotion of the mass m2, as function of the mass ratio m2 /m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = 0)."]},{"key":"dc:title","label":"Title","values":["Aplicabilidade de uma máquina teste eletrodinâmica a molas não lineares"]}]}],"canonical_facts":{"dc:contributor.advisor":["Ripper Neto, Arthur Palmeira"],"dc:creator":["Bastos, Leopoldo Eurico Gonçalves"],"dc:date.accessioned":["2018-01-03T16:53:03Z"],"dc:date.available":["2026-05-16T03:04:24Z"],"dc:date.issued":["1969-10"],"dc:description.abstract":["An eletrodynamic system for testing fatigue in springs is represented by a model which has two degrees of freedom. The simulation of the tester by a two degrees af freedom system with restoring force F =(α+βx²)x is made on an analog computer EAI – TR48 DES – 30. The favorable values of the spring deflection ratio y1 /(y2 - y1) the frequency of the exciting force, and y2 the amplitude of motion of the mass m2, as function of the mass ratio m2/m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = O). The favorable values of the spring deflection ratio y1 /(y2 - y1), the frequency of the exciting force, and y2 the amplitude ofmotion of the mass m2, as function of the mass ratio m2 /m1, are determined to the execution of the test. The results are compared with those of the analytic solution for the case of linear springs (β = 0)."],"dc:identifier.uri":["http://hdl.handle.net/11422/3381"],"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":["Modelos não lineares","Dinâmica","Vibrações"],"dc:title":["Aplicabilidade de uma máquina teste eletrodinâmica a molas não lineares"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:01Z"}