{"id":18189,"date":"2024-08-27T10:44:19","date_gmt":"2024-08-27T10:44:19","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=18189"},"modified":"2024-08-27T10:44:19","modified_gmt":"2024-08-27T10:44:19","slug":"the-aeroelastic-behaviour-of-a-forward-swept-wing-configuration-with-focus-on-engine-gyroscopics-and-t-tail-flutter","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/08\/27\/the-aeroelastic-behaviour-of-a-forward-swept-wing-configuration-with-focus-on-engine-gyroscopics-and-t-tail-flutter\/","title":{"rendered":"THE AEROELASTIC BEHAVIOUR OF A FORWARD-SWEPT WING CONFIGURATION WITH FOCUS ON ENGINE GYROSCOPICS AND T-TAIL FLUTTER"},"content":{"rendered":"\n<p><strong>Stefan Waitz<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: IFASD-2017-207<\/strong><\/p>\n\n\n\n<p>Since more and more modern civil aircraft for reasons of fuel e\ufb03ciency and environmental aspects are equipped with UHBR-engines, the need to tackle speci\ufb01c engine related dynamic problems has occured. The request for UHBR-engines with high bypass ratio numbers and with their intrinsic advantages of economic fuel consumption and lower acoustic emission asks for enhanced prediction capabilities. Beside the energetic bene\ufb01ts such engines add to the aircraft design their rotating large diameter fans can in\ufb02uence the dynamic behaviour of the complete elastic aircraft fuselage in a very unfavourable manner. Especially in the scenario when large rotating engine masses are to be combined with elastic suspension structures the possible occurance of structural vibration problems can be avoided by taking the gyroscopic e\ufb00ects into account. As another important engine related question the modelling and the impact of the engine thrust is highlighted by integration of the follower force induced terms into the dynamical simulation model. A further approach towards lower fuel consumption is the drag reduction of the airplane. This can be realized by keeping the \ufb02ow \ufb01eld around the wing surfaces laminar as much as possible. With the ALLEGRA-S con\ufb01guration a short and medium range aircraft has been designed with the aim of drag reduction by keeping the wing \ufb02ow laminar as long as possible. Together with laminar aerodynamic wing airfoil sections the forward sweep of the wings has a favourable in\ufb02uence on the laminar character of the wing \ufb02ow. The forward swept wings as well as the T-tail empennage and the backward position of the engine nacelles on both sides of the fuselage also have a formative in\ufb02uence on the \ufb02utter behaviour and thus the stability margings of the design. The \ufb02utter behaviour of several baseline mass con\ufb01gurations has been examined. Important questions with regard to the enhancement of the \ufb02utter model and the impact on structural dynamics and aeroelasticity are treated in this work. For example by introducing additional d.o.f. coupling into the aeroelastic model the component correction terms have in\ufb02uenced particular \ufb02utter eigenmodes and caused (minor) deviations in \ufb02utter frequencies and velocities.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/08\/IFASD-2017-207.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Stefan Waitz<b\/><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: IFASD-2017-207<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1957,1953],"tags":[2355,2358,2360,2357,2359,2356,2354,2352,2361,2353],"class_list":["post-18189","post","type-post","status-publish","format-standard","hentry","category-events","category-computational-aeroelasticity","category-ifasd-2017","tag-asymmetric-eigenmode","tag-critical-speed","tag-engine-aeroelasticity","tag-engine-thrust","tag-utter-frequency","tag-follower-force","tag-forward-sweep","tag-gyroscopics","tag-laminar-ow","tag-t-tail-utter","category-993","category-1957","category-1953","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18189","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=18189"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18189\/revisions"}],"predecessor-version":[{"id":18191,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18189\/revisions\/18191"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=18189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=18189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=18189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}