When dealing with slender rotors, several vibrations modes can be relevant to define their dynamic behavior in working conditions. Considering long lathing bars, for example, it is almost impossible not to encounter one or more of their critical speeds during machining. Therefore, modelling slender rotors is essential to predict and analyse such conditions. The lumped parameters approach is adopted in this study as it enables to consider the compliance of the system's constraints. The stiffness matrix is obtained considering a succession of Timoshenko elements beams, and the stiffness of the constraints is addressed based on the results of experimental modal analyses. The equations of motion are derived from the Lagrange equation and implemented in MATLAB® Simulink. The model is then validated by comparing the numerical frequency response functions with the experimental ones. Numerical results are proved to be consistent with linear theory of rotor dynamics and can be used to predict the behavior of slender rotors of different materials.

Caselli, L., Rizzitelli, M., Rivola, A., Troncossi, M. (2024). On the numerical modelling of a rotor system to support the analysis of experimental vibration signals for the condition monitoring of a CN lathe integrated with an automatic bar feeder. Leuven : KU Leuven, Departement Werktuigkunde.

On the numerical modelling of a rotor system to support the analysis of experimental vibration signals for the condition monitoring of a CN lathe integrated with an automatic bar feeder

Caselli L.;Rivola A.;Troncossi M.
2024

Abstract

When dealing with slender rotors, several vibrations modes can be relevant to define their dynamic behavior in working conditions. Considering long lathing bars, for example, it is almost impossible not to encounter one or more of their critical speeds during machining. Therefore, modelling slender rotors is essential to predict and analyse such conditions. The lumped parameters approach is adopted in this study as it enables to consider the compliance of the system's constraints. The stiffness matrix is obtained considering a succession of Timoshenko elements beams, and the stiffness of the constraints is addressed based on the results of experimental modal analyses. The equations of motion are derived from the Lagrange equation and implemented in MATLAB® Simulink. The model is then validated by comparing the numerical frequency response functions with the experimental ones. Numerical results are proved to be consistent with linear theory of rotor dynamics and can be used to predict the behavior of slender rotors of different materials.
2024
Proceedings of ISMA 2024 - International Conference on Noise and Vibration Engineering and USD 2024 - International Conference on Uncertainty in Structural Dynamics
1125
1136
Caselli, L., Rizzitelli, M., Rivola, A., Troncossi, M. (2024). On the numerical modelling of a rotor system to support the analysis of experimental vibration signals for the condition monitoring of a CN lathe integrated with an automatic bar feeder. Leuven : KU Leuven, Departement Werktuigkunde.
Caselli, L.; Rizzitelli, M.; Rivola, A.; Troncossi, M.
File in questo prodotto:
Eventuali allegati, non sono esposti

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/11585/1000840
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact