NASA NTRS · 19990027613
Identification of 15-15 Aeroelastic Modes using Frequency-Domain Methods
Abstract
The XV-15 Tilt-Rotor wing has six major aeroelastic modes that are close in frequency. To precisely excite individual modes during flight test, dual flaperon exciters with automatic frequency-sweep controls were installed. The resulting structural data were analyzed in the frequency domain (Fourier-transformed). Modal frequencies and damping were determined by performing curve fits to frequency-response magnitude and phase data. Results are given for the XV-15 with its original metal rotor blades. Frequency and damping values are also compared with new predictions by two different programs, CAMRAD and ASAP.
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Acree, C. W., Jr., Tischler, Mark B.. 1988-01-01. Identification of 15-15 Aeroelastic Modes using Frequency-Domain Methods. https://ntrs.nasa.gov/citations/19990027613
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