Dynamic substructuring methods are originally developed for time invariant systems in order to evaluate the dynamic behavior of a complex structure by coupling the component substructures. Sometimes, the component substructures change their position over time affecting the dynamics of the entire structure. This family of problems can be tackled using substructuring techniques by isolating the time dependency in the coupling conditions among the substructures that are time invariant. Mechanical systems, composed by subsystems in relative motion with a sliding interface, can be analyzed using this approach. In previous works the authors proposed a solution method in time and frequency domain using this approach under the assumption that the relative sliding motion at the contact interfaces is a-priori known, at least approximately. The previous assumption implies that the perturbation generated by the friction induced vibration is neglected. In this work the analysis is extended to account for friction induced vibrations in the formulation of the coupling conditions. This extension allows for the investigation of a wider range of operating conditions including also friction induced instabilities.

Dynamic substructuring with time variant coupling conditions for the analysis of friction induced vibrations

Brunetti J.;D'Ambrogio W.;
2020

Abstract

Dynamic substructuring methods are originally developed for time invariant systems in order to evaluate the dynamic behavior of a complex structure by coupling the component substructures. Sometimes, the component substructures change their position over time affecting the dynamics of the entire structure. This family of problems can be tackled using substructuring techniques by isolating the time dependency in the coupling conditions among the substructures that are time invariant. Mechanical systems, composed by subsystems in relative motion with a sliding interface, can be analyzed using this approach. In previous works the authors proposed a solution method in time and frequency domain using this approach under the assumption that the relative sliding motion at the contact interfaces is a-priori known, at least approximately. The previous assumption implies that the perturbation generated by the friction induced vibration is neglected. In this work the analysis is extended to account for friction induced vibrations in the formulation of the coupling conditions. This extension allows for the investigation of a wider range of operating conditions including also friction induced instabilities.
9789082893113
File in questo prodotto:
File Dimensione Formato  
Contribution_367_proceeding_3.pdf

solo utenti autorizzati

Descrizione: Versione editoriale
Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 981.63 kB
Formato Adobe PDF
981.63 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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: http://hdl.handle.net/11697/167157
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 0
social impact