{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/3558"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/3558","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Um sistema automático de projeto de estruturas ótimas","abstract":"A computer system for the automatic sizing of large-scale structures is developed, making use of an \"optimali ty cri terion\" algori thm, where inequali ty constraints are treated with the aid of slack-variables. Attention is focused on fixed geometry structures which can be idealized using finite elements. Multiple loading conditions are also considered. Element stresses, nodal displacements, and buckling of axialy compressed elements are considered as constraints. Methods of structural analysis, calculation of gradients of response functions and the general organization of the system are ihoroughly described. The mathematical foundations of the optimization algorithm,are also showed in condensed form. The automatic design of a variety of structural systems, allows to conclude that the system performance is efficient and competitive.","abstract_html":"A computer system for the automatic sizing of large-scale structures is developed, making use of an "optimali ty cri terion" algori thm, where inequali ty constraints are treated with the aid of slack-variables. Attention is focused on fixed geometry structures which can be idealized using finite elements. Multiple loading conditions are also considered. Element stresses, nodal displacements, and buckling of axialy compressed elements are considered as constraints. Methods of structural analysis, calculation of gradients of response functions and the general organization of the system are ihoroughly described. The mathematical foundations of the optimization algorithm,are also showed in condensed form. The automatic design of a variety of structural systems, allows to conclude that the system performance is efficient and competitive.","abstract_has_math":false,"creators":["Herskovits, José"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Segenreich, Solly Andy"],"committee_chairs":[],"committee_members":[],"year":1976,"date_issued":"1976-12","date_published":"1976-12","updated_at":"2026-07-24T01:16:04Z","subjects":["Dimensionamento de estruturas","Otimização matemática","Programa computacional"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/3558","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Segenreich, Solly Andy"]},{"key":"dc:creator","label":"Author","values":["Herskovits, José"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-01-29T14:09:23Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:00:55Z"]},{"key":"dc:date.issued","label":"Date","values":["1976-12"]},{"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":["Dimensionamento de estruturas","Otimização matemática","Programa computacional"]}]},{"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/11422/3558"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A computer system for the automatic sizing of large-scale structures is developed, making use of an \"optimali ty cri terion\" algori thm, where inequali ty constraints are treated with the aid of slack-variables. Attention is focused on fixed geometry structures which can be idealized using finite elements. Multiple loading conditions are also considered. Element stresses, nodal displacements, and buckling of axialy compressed elements are considered as constraints. Methods of structural analysis, calculation of gradients of response functions and the general organization of the system are ihoroughly described. The mathematical foundations of the optimization algorithm,are also showed in condensed form. The automatic design of a variety of structural systems, allows to conclude that the system performance is efficient and competitive.","Se desarrolla un sistema computacional, que dimensiona enforma automática, estructuras óptimas de gran porte. El mismo utiliza un algoritmo de optimización de tipo \"Criterio de Optimalidad\", en el que se tratan las restricciones de desigualdad, mediante la definición de variables de desvío. El sistema considera estructuras discretizables me diante la utilización de elementos finitos, sometidas a varias estados de carga y de geometría prefijada por el proyectista. Las restricciones incluídas son aquellas que limitan desplazamientos nodales y tensiones en los elementos, adicionando la consideración de pandeo, en los elementos axiales sometidos a compresión. Se describen los métodos de análisis estructural utilizados y el cálculo de los gradientes de las funciones de respuesta, al igual que la organización general del sistema. También se presentan, enforma condensada, los fundamentos matemáticos del algoritmo de optimización. La resolución de diversos ejemplos estructurales, permite observar que el sistema actúa enforma eficiente y competitiva."]},{"key":"dc:title","label":"Title","values":["Um sistema automático de projeto de estruturas ótimas"]}]}],"canonical_facts":{"dc:contributor.advisor":["Segenreich, Solly Andy"],"dc:creator":["Herskovits, José"],"dc:date.accessioned":["2018-01-29T14:09:23Z"],"dc:date.available":["2026-05-16T03:00:55Z"],"dc:date.issued":["1976-12"],"dc:description.abstract":["A computer system for the automatic sizing of large-scale structures is developed, making use of an \"optimali ty cri terion\" algori thm, where inequali ty constraints are treated with the aid of slack-variables. Attention is focused on fixed geometry structures which can be idealized using finite elements. Multiple loading conditions are also considered. Element stresses, nodal displacements, and buckling of axialy compressed elements are considered as constraints. Methods of structural analysis, calculation of gradients of response functions and the general organization of the system are ihoroughly described. The mathematical foundations of the optimization algorithm,are also showed in condensed form. The automatic design of a variety of structural systems, allows to conclude that the system performance is efficient and competitive.","Se desarrolla un sistema computacional, que dimensiona enforma automática, estructuras óptimas de gran porte. El mismo utiliza un algoritmo de optimización de tipo \"Criterio de Optimalidad\", en el que se tratan las restricciones de desigualdad, mediante la definición de variables de desvío. El sistema considera estructuras discretizables me diante la utilización de elementos finitos, sometidas a varias estados de carga y de geometría prefijada por el proyectista. Las restricciones incluídas son aquellas que limitan desplazamientos nodales y tensiones en los elementos, adicionando la consideración de pandeo, en los elementos axiales sometidos a compresión. Se describen los métodos de análisis estructural utilizados y el cálculo de los gradientes de las funciones de respuesta, al igual que la organización general del sistema. También se presentan, enforma condensada, los fundamentos matemáticos del algoritmo de optimización. La resolución de diversos ejemplos estructurales, permite observar que el sistema actúa enforma eficiente y competitiva."],"dc:identifier.uri":["http://hdl.handle.net/11422/3558"],"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":["Dimensionamento de estruturas","Otimização matemática","Programa computacional"],"dc:title":["Um sistema automático de projeto de estruturas ótimas"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:04Z"}