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UID:0-418@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20171025T163000

DTEND;TZID=Asia/Jerusalem:20171025T173000

DTSTAMP:20230530T180253Z

URL:https://aerospace.technion.ac.il/events/nonlinear-structural-and-aerod
 ynamic-modeling-for-static-aeroelastic-analysis/

SUMMARY:Nonlinear Structural and Aerodynamic Modeling for Static Aeroelasti
 c Analysis
DESCRIPTION:Lecturer:Etay Kantor\n Faculty:Department of Aerospace Engineer
 ing\n Institute:Technion – Israel Institute of Technology\n Location:Cla
 ssroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract: 
 \n Details: \n The push towards lighter and more efficient aircraft struct
 ures has led to modern aircraft configurations that are more elastic than 
 ever\, featuring large elastic deformations in their operating conditions
 . This trend applies to UAV platforms as well as to transport aircraft. Su
 ch platform might be susceptible to detrimental aeroelastic phenomena that
  must be accurately analyzed and accounted for in the design process. One 
 shortcoming of modern production aeroelastic analysis and design methods i
 s that they typically rely on linear structural and linear aerodynamic mod
 els\, which are not suitable for geometrically nonlinear structures\, of l
 arge deformations.\nThe current study employs a nonlinear\, modal-based\, 
 structural modeling approach\, together with nonlinear aerodynamic modelin
 g\, for static aeroelastic analyses. The nonlinear structural model\, int
 ended for geometrically nonlinear structures of large deformations\, analy
 zes the deformations of a beam-like structure by dividing it into a small 
 number of segments. Large deformations are treated as the sum of large\, r
 igid-body displacements of the segment\, plus small\, linear\, elastic def
 ormation within the segment. The nonlinear aerodynamic modeling approach i
 s a modified strip theory\, also designed for beam-like structures\, that 
 is based on a database of nonlinear sectional aerodynamic forces. The semi
 nar will present the two models\, with focus on the nonlinear structural m
 odel and the intricacies of the application of compatibility equations bet
 ween segments when using a modal approach.\nThe numerical examples include
  several load cases that validate the implementation of the methodology a
 nd demonstrate its use for static aeroelastic applications. Two validation
  cases include a beam subject to a large follower tip force\, with referen
 ce to results from commercial nonlinear finite-element solver\, and a wind
 -tunnel test of a wing with large deformations. The third case is of a hig
 hly elastic wing subject to large aerodynamic loading. It is used to compa
 re between the nonlinear and linear structural and aerodynamic modeling ap
 proaches\, and highlight the effect of nonlinear modeling on the resulting
  aeroelastic and aerodynamic characteristics.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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