NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Aeroelasticity of Axially Loaded Aerodynamic Structures for Truss-Braced Wing AircraftThis paper presents an aeroelastic finite-element formulation for axially loaded aerodynamic structures. The presence of axial loading causes the bending and torsional sitffnesses to change. For aircraft with axially loaded structures such as the truss-braced wing aircraft, the aeroelastic behaviors of such structures are nonlinear and depend on the aerodynamic loading exerted on these structures. Under axial strain, a tensile force is created which can influence the stiffness of the overall aircraft structure. This tension stiffening is a geometric nonlinear effect that needs to be captured in aeroelastic analyses to better understand the behaviors of these types of aircraft structures. A frequency analysis of a rotating blade structure is performed to demonstrate the analytical method. A flutter analysis of a truss-braced wing aircraft is performed to analyze the effect of geometric nonlinear effect of tension stiffening on the flutter speed. The results show that the geometric nonlinear tension stiffening effect can have a significant impact on the flutter speed prediction. In general, increased wing loading results in an increase in the flutter speed. The study illustrates the importance of accounting for the geometric nonlinear tension stiffening effect in analyzing the truss-braced wing aircraft.
Document ID
20160000197
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Nguyen, Nhan (NASA Ames Research Center Moffett Field, CA United States)
Ting, Eric (SGT, Inc. Moffett Field, CA, United States)
Lebofsky, Sonia (SGT, Inc. Moffett Field, CA, United States)
Date Acquired
January 5, 2016
Publication Date
January 5, 2015
Subject Category
Aircraft Design, Testing And Performance
Structural Mechanics
Report/Patent Number
ARC-E-DAA-TN20180
Meeting Information
Meeting: AIAA Science and Technology Forum (AIAA SciTech 2015)
Location: Kissimmee, FL
Country: United States
Start Date: January 5, 2015
End Date: January 9, 2015
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 473452.02.01.03.02.02
CONTRACT_GRANT: NNA14AA60C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Aeroelasticity
Flutter
Finite-Element Method

Related Records

There are no records associated with this record.
No Preview Available