NDLI: Aeroelastic analysis of high aspect ratio wing in subsonic flow

Content Provider	IEEE Xplore Digital Library
Author	Ahmad, K. Wuzhigang, W. Rahman, H.
Copyright Year	2013
Description	Author affiliation: Sch. of Aeronaut. Sci. & Eng., Beihang Univ. of Aeronaut. & Astronaut., Beijing, China (Ahmad, K.; Wuzhigang, W.; Rahman, H.)
Abstract	High altitude long endurance (HALE) UAVs have very flexible wing because of mission requirements. High lifts to drag ratio and more surveillance time in air requirements make their structure highly flexible and large tip deflections can occur which can be as large as 30% of wing semi span. Linear theory fails to accurately analyze such deformation and the changes in the structural and aerodynamic characteristics of the wing accompanying such deformation. Low aspect ratio wing and stiff structures can be best simulated by normal modes in aeroelastic analysis. However high aspect ratio restricts the use of reduce order model based on linear normal modes in aeroelastic analysis. The reason not to use the linear elastic normal modes in high AR wings is the stiffening effects because of large deflections. These effects cause the normal modes to fail as a good basis set. In such situation one needs to use the modified basis function. The computational model used in this work consists of a modified modal based reduced order nonlinear structural dynamics model coupled to a ZONA6's lifting surface method which is a higher-order panel method. Using modified modal basis, geometrical nonlinearities has been captured very well. Aeroelastic analyses agree well with the published data.
Starting Page	219
Ending Page	223
File Size	946414
Page Count	5
File Format	PDF
ISBN	9781467344258
e-ISBN	9781467344265
DOI	10.1109/IBCAST.2013.6512157
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-15
Publisher Place	Pakistan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Deformable models torsion mode Atmospheric modeling aeroelasticity Lattices modal analysis flutter velocity bending mode high aspect ratio
Content Type	Text
Resource Type	Article

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