TY - GEN
T1 - Analysis of the forced response of dry-friction damped structural systems using an efficient hybrid frequency-Time method
AU - Guillen, J.
AU - Pierre, C.
N1 - Publisher Copyright:
© 1996 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1996
Y1 - 1996
N2 - The steady-state response to periodic excitation of dry friction damped structural systems is studied. The general model considered is a linear structure with one flexible dry friction damper connected to ground representing, for example, a blade with an attached friction damper in a turbomachinery rotor stage. A full hysteretic model of the dry friction force is considered, which involves no further approximation of Coulomb s law. Namely, the relative slip velocity at the frictional interface is taken to vanish when the damper is stuck, unlike the often-Assumed piecewise linear relation between friction force and slip velocity. The solution procedure used is a hybrid frequency-Time domain algorithm, which is largely based upon the incremental multiharmonic balance method. The method is significantly improved by the use of several efficient numerical techniques, such as Fast Fourier Transforms and Toeplitz Jacobian Matrices. In addition, new features are developed to achieve the fast generation of frequency responses, namely, adaptive step size and line search algorithms for automatic sweeps in amplitude and frequency. The resulting solution procedure is highly performant and gives reliable and accurate results for a wide range of system parameters. It allows for the fast and automatic generation of steady-state frequency responses. Results are obtained for both a single-degree of freedom, dry friction damped system and for a beam with one friction damper attached. Interesting features of the non-linear response are revealed.
AB - The steady-state response to periodic excitation of dry friction damped structural systems is studied. The general model considered is a linear structure with one flexible dry friction damper connected to ground representing, for example, a blade with an attached friction damper in a turbomachinery rotor stage. A full hysteretic model of the dry friction force is considered, which involves no further approximation of Coulomb s law. Namely, the relative slip velocity at the frictional interface is taken to vanish when the damper is stuck, unlike the often-Assumed piecewise linear relation between friction force and slip velocity. The solution procedure used is a hybrid frequency-Time domain algorithm, which is largely based upon the incremental multiharmonic balance method. The method is significantly improved by the use of several efficient numerical techniques, such as Fast Fourier Transforms and Toeplitz Jacobian Matrices. In addition, new features are developed to achieve the fast generation of frequency responses, namely, adaptive step size and line search algorithms for automatic sweeps in amplitude and frequency. The resulting solution procedure is highly performant and gives reliable and accurate results for a wide range of system parameters. It allows for the fast and automatic generation of steady-state frequency responses. Results are obtained for both a single-degree of freedom, dry friction damped system and for a beam with one friction damper attached. Interesting features of the non-linear response are revealed.
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U2 - 10.1115/IMECE1996-0435
DO - 10.1115/IMECE1996-0435
M3 - Conference contribution
AN - SCOPUS:85030042756
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 41
EP - 49
BT - Nonlinear Dynamics and Controls
T2 - ASME 1996 International Mechanical Engineering Congress and Exposition, IMECE 1996
Y2 - 17 November 1996 through 22 November 1996
ER -