{"id":17932,"date":"2024-08-16T10:11:14","date_gmt":"2024-08-16T10:11:14","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=17932"},"modified":"2024-08-16T10:11:15","modified_gmt":"2024-08-16T10:11:15","slug":"nonlinear-structural-nonlinear-aerodynamic-model-for-static-aeroelastic-problems","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/08\/16\/nonlinear-structural-nonlinear-aerodynamic-model-for-static-aeroelastic-problems\/","title":{"rendered":"NONLINEAR-STRUCTURAL-NONLINEAR-AERODYNAMIC MODEL FOR STATIC AEROELASTIC PROBLEMS"},"content":{"rendered":"\n<p><strong>Etay Kantor, Daniella E. Raveh<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: IFASD-2017-103<\/strong><\/p>\n\n\n\n<p>The study presents the derivation and application of a nonlinear modal-based structural model for static aeroelastic applications. The model, intended for geometrically nonlinear structures, of large deformations, analyzes the deformations of a beam structure by dividing it into a few segment. Large deformations are treated as the sum of large, rigid-body displacements of the segment, plus small, linear, elastic deformation within the segment. The novelty of the approach is that the elastic deformations at each segment are computed using a modal approach, with \ufb01ctitious masses to facilitate the coupling between segments. The use of the modal approach in a large deformations case introduces dif\ufb01culties in the application of compatibility equations between segments that are explained and addressed in the paper. The numerical examples include several load cases that validate the implementation of the methodology and demonstrate its use for static aeroelastic applications. The \ufb01rst test case is of a beam subject to a large follower tip forces. Results are in good agreement with those computed by a commercial nonlinear \ufb01nite element solver, while introducing great improvement in the computational ef\ufb01ciency. The second test case describes a beam subject to aerodynamic loads at various air speeds, and angles of attack. In this case, the nonlinear structural model is coupled with a modi\ufb01ed strip model, based on CFD rigid simulations. Comparison with linear-aero linear-structural model shows excellent agreement in the low air speeds, highlighting the shortcomings of the linear-structural-linearaerodynamic model in representing highly \ufb02exible structures under large aerodynamic loads.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/08\/IFASD-2017-103.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Etay Kantor, Daniella E. Raveh<b\/><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: IFASD-2017-103<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1961,1953],"tags":[1972,2149,2146,2148,2150,2107,2145,2147],"class_list":["post-17932","post","type-post","status-publish","format-standard","hentry","category-events","category-highly-flexible-aircraft-structures","category-ifasd-2017","tag-aeroelasticity","tag-co-rotational","tag-earities","tag-ctitious-mass","tag-geometric-structural-nonlin","tag-large-deformations","tag-modal-superposition","tag-model-reduction-ifasd","category-993","category-1961","category-1953","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/17932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/comments?post=17932"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/17932\/revisions"}],"predecessor-version":[{"id":17934,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/17932\/revisions\/17934"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=17932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=17932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=17932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}