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Data‐based model‐free representation of complex hysteretic MDOF systems
10.1002/stc.147.abs
A general approach is presented for developing data‐based, model‐free representations of complex non‐linear (including hysteretic) multi‐degree‐of‐freedom (MDOF) systems under arbitrary dynamic loads. Only the excitation forces and corresponding response is needed to implement the procedure: the system mass need not be known. The approach utilizes a two‐stage procedure: in the first stage, least‐squares techniques are used to identify the system matrices of an equivalent linear MDOF system; in the second stage, the non‐linear system restoring force vector is determined, and transformed into the ‘modal space’ associated with the eigenvectors of the linearized system. Subsequently, non‐parametric identification techniques are used to represent the transformed restoring force surface in terms of suitable state variables. The robustness of the method is illustrated by means of a 3DOF system incorporating non‐linear features associated with friction, hysteresis, and limited‐slip phenomena, as typically encountered in ‘joints.’ Copyright © 2005 John Wiley & Sons, Ltd.
Data‐based model‐free representation of complex hysteretic MDOF systems
10.1002/stc.147.abs
A general approach is presented for developing data‐based, model‐free representations of complex non‐linear (including hysteretic) multi‐degree‐of‐freedom (MDOF) systems under arbitrary dynamic loads. Only the excitation forces and corresponding response is needed to implement the procedure: the system mass need not be known. The approach utilizes a two‐stage procedure: in the first stage, least‐squares techniques are used to identify the system matrices of an equivalent linear MDOF system; in the second stage, the non‐linear system restoring force vector is determined, and transformed into the ‘modal space’ associated with the eigenvectors of the linearized system. Subsequently, non‐parametric identification techniques are used to represent the transformed restoring force surface in terms of suitable state variables. The robustness of the method is illustrated by means of a 3DOF system incorporating non‐linear features associated with friction, hysteresis, and limited‐slip phenomena, as typically encountered in ‘joints.’ Copyright © 2005 John Wiley & Sons, Ltd.
Data‐based model‐free representation of complex hysteretic MDOF systems
F. Masri, S. (author) / Tasbihgoo, F. (author) / P. Caffrey, J. (author) / W. Smyth, A. (author) / G. Chassiakos, A. (author)
Structural Control and Health Monitoring ; 13 ; 365-387
2006-01-01
23 pages
Article (Journal)
Electronic Resource
English
hysteresis , modelling , simulation , identification , non‐linear , joints
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