Damping in coupled bending and torsion - An experimentTraditional experimental modal testing methods are used to determine the damping properties of a Euler-Bernoulli beam with offset inertial tip mass. Both viscous and strain rate damping models are considered in bending and in torsion. A partial differential equation model of the coupled system is used. Eigenfunctions are derived for the coupled system by using a Green's function approach to derive the approximate uncoupled eigenfunctions. These eigenfunctions are used in a decoupled fashion with experimental modal data to estimate the damping parameters of the coupled system. The experimental modal data were obtained from both free and impulse responses using a combined translational and rotational accelerometer.
Document ID
19920046738
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Umland, Jeffrey W. (JPL, Pasadena, CA; New York, State University Buffalo, United States)
Inman, Daniel J. (New York, State University Buffalo, United States)
Banks, H. T. (Southern California, University Los Angeles, CA, United States)