TY - GEN
T1 - Non-contact experimental modal analysis of a curved beam using a full-field optical technique
AU - Ehrhardt, David A.
AU - Abanto-Bueno, Jorge L.
AU - Parks, Cory D.
AU - Shukla, Amit
N1 - Funding Information:
The authors gratefully acknowledged the Structural Sciences Center in the Air Vehicles Directorate of the Air Force Research Laboratory for supporting this investigation (Contract No. FA8650-10-D-3037).
PY - 2011
Y1 - 2011
N2 - The prediction of the response of structures with complex geometries has seen extensive work analytically and numerically, with incomplete experimental work. In this investigation the non-contact full-field 3D digital image correlation (3D-DIC) technique coupled with high-speed imaging and the Fast Fourier Transform (FFT) are used to study the dynamic behavior of a clamped-clamped curved beam subjected to harmonic base excitation. Images were processed using 3D-DIC to gather the full-field displacement measurements of the beam. The effect of the clamping process on the radius of curvature of the beam was characterized prior to the swept-sine test. During testing, 1024×512-pixel images were taken at a rate of 3000 fps. Natural frequencies and mode shapes were determined for a curved beam subjected to a swept-sine test at an excitation of 9g's and over a frequency range of 60 - 430 Hz.
AB - The prediction of the response of structures with complex geometries has seen extensive work analytically and numerically, with incomplete experimental work. In this investigation the non-contact full-field 3D digital image correlation (3D-DIC) technique coupled with high-speed imaging and the Fast Fourier Transform (FFT) are used to study the dynamic behavior of a clamped-clamped curved beam subjected to harmonic base excitation. Images were processed using 3D-DIC to gather the full-field displacement measurements of the beam. The effect of the clamping process on the radius of curvature of the beam was characterized prior to the swept-sine test. During testing, 1024×512-pixel images were taken at a rate of 3000 fps. Natural frequencies and mode shapes were determined for a curved beam subjected to a swept-sine test at an excitation of 9g's and over a frequency range of 60 - 430 Hz.
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U2 - 10.2514/6.2011-1945
DO - 10.2514/6.2011-1945
M3 - Conference contribution
AN - SCOPUS:84872451100
SN - 9781600869518
T3 - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
BT - 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 4 April 2011 through 7 April 2011
ER -