The phenomena of mode veering, crossing and lock-in are analyzed in this paper. Their occurrence is generally found, under different conditions, when there is a parameter varying in the system, producing a change in its behavior. It often happens that, when the frequencies approach each other, they can cross, veer or eventually present a lock-in state. The problem is analytically investigated for a general weakly-coupled two-degrees of freedom systems and then extended to show their evidence in practical physical situations. How things change when the coupling is not weak is address is also discussed to highlight phenomena of particular interest.
TRANSITION AMONG VEERING, CROSSING AND LOCK-IN THROUGH VARIATION OF THE SYSTEM PARAMETERS / Giannini, Oliviero; Sestieri, Aldo. - ELETTRONICO. - (2013). (Intervento presentato al convegno RASD 2013 11th International Conference on Recent Advances in Structural Dynamics tenutosi a Pisa nel 1-3 Luglio 2013).
TRANSITION AMONG VEERING, CROSSING AND LOCK-IN THROUGH VARIATION OF THE SYSTEM PARAMETERS
GIANNINI, Oliviero;SESTIERI, Aldo
2013
Abstract
The phenomena of mode veering, crossing and lock-in are analyzed in this paper. Their occurrence is generally found, under different conditions, when there is a parameter varying in the system, producing a change in its behavior. It often happens that, when the frequencies approach each other, they can cross, veer or eventually present a lock-in state. The problem is analytically investigated for a general weakly-coupled two-degrees of freedom systems and then extended to show their evidence in practical physical situations. How things change when the coupling is not weak is address is also discussed to highlight phenomena of particular interest.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
