The aeroelastic stability of a multi-body system is studied through a four-degree-of-freedom model, which describes the linearized section dynamics of particular suspended bridges with doubly-symmetric cross-section, subject to a lateral stationary wind flow. A multi-parameter perturbation solution, applied on the classic modal problem in internal resonance conditions, allows a consistent reduction of the model dimensions. The bifurcation scenario described by a local stability analysis in the resonance region is featured by two stability boundaries, strongly interacting in the parameter space. The analysis of the critical wind velocity provides satisfying engineering results, pointing out how resonant light cables or dissipative cable-deck couplings may have beneficial effects in preventing the aeroelastic instability.

"Aeroelastic stability of a symmetric multi-body sectional model"

LEPIDI, MARCO;PICCARDO, GIUSEPPE
2013

Abstract

The aeroelastic stability of a multi-body system is studied through a four-degree-of-freedom model, which describes the linearized section dynamics of particular suspended bridges with doubly-symmetric cross-section, subject to a lateral stationary wind flow. A multi-parameter perturbation solution, applied on the classic modal problem in internal resonance conditions, allows a consistent reduction of the model dimensions. The bifurcation scenario described by a local stability analysis in the resonance region is featured by two stability boundaries, strongly interacting in the parameter space. The analysis of the critical wind velocity provides satisfying engineering results, pointing out how resonant light cables or dissipative cable-deck couplings may have beneficial effects in preventing the aeroelastic instability.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/631848
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact