The Influence of the Mesh Element Size
on Critical Bending Speeds of a Rotor
in the Finite Element Analysis
Ion Cr⸠stiu, Dorin Simoiu, Calin Gozman-Pop, Paul Dru¸ ta,
and Liviu Bereteu
Abstract All software used in mechanical engineering such as ANSYS, CATIA,
SOLIDWORKS, and others contain modules for designing different components,
as well as modules for dynamic behavior analysis. Determining the natural modes
and the critical bending speeds of a rotor can be quite complicated by an analytical
approach, but relatively simple if numerical analysis methods are used. Numerical
analysis based on the finite element method (FEM) is the most commonly used in
the modal analysis of a mechanical structure. Choosing a larger or smaller mesh
size can increase the working time without affecting the accuracy required. In this
paper, we are looking at the effect of the dimension of the finite element mesh size
on the critical speeds of a rotor. The numerical results obtained by modal analysis
are compared with the experimental results obtained by analyzing a vibroacoustic
signal given by applying a mechanical impulse.
I. Cr⸠stiu · D. Simoiu · C. Gozman-Pop · P. Dru¸ ta · L. Bereteu (B)
Mechanics and Materials Strength Department, Politehnica University of Timi¸ soara, Bd. Mihai
Viteazul, Nr. 1, 300222 Timi¸ soara, Romania
e-mail: liviu.bereteu@upt.ro
I. Cr⸠stiu
e-mail: ion_crastiu@yahoo.com
D. Simoiu
e-mail: dorin.simoiu@upt.ro
C. Gozman-Pop
e-mail: calin.gozman@gmail.com
P. Dru¸ ta
e-mail: paul.druta@yahoo.com
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_53
523
on Critical Bending Speeds of a Rotor
in the Finite Element Analysis
Ion Cr⸠stiu, Dorin Simoiu, Calin Gozman-Pop, Paul Dru¸ ta,
and Liviu Bereteu
Abstract All software used in mechanical engineering such as ANSYS, CATIA,
SOLIDWORKS, and others contain modules for designing different components,
as well as modules for dynamic behavior analysis. Determining the natural modes
and the critical bending speeds of a rotor can be quite complicated by an analytical
approach, but relatively simple if numerical analysis methods are used. Numerical
analysis based on the finite element method (FEM) is the most commonly used in
the modal analysis of a mechanical structure. Choosing a larger or smaller mesh
size can increase the working time without affecting the accuracy required. In this
paper, we are looking at the effect of the dimension of the finite element mesh size
on the critical speeds of a rotor. The numerical results obtained by modal analysis
are compared with the experimental results obtained by analyzing a vibroacoustic
signal given by applying a mechanical impulse.
I. Cr⸠stiu · D. Simoiu · C. Gozman-Pop · P. Dru¸ ta · L. Bereteu (B)
Mechanics and Materials Strength Department, Politehnica University of Timi¸ soara, Bd. Mihai
Viteazul, Nr. 1, 300222 Timi¸ soara, Romania
e-mail: liviu.bereteu@upt.ro
I. Cr⸠stiu
e-mail: ion_crastiu@yahoo.com
D. Simoiu
e-mail: dorin.simoiu@upt.ro
C. Gozman-Pop
e-mail: calin.gozman@gmail.com
P. Dru¸ ta
e-mail: paul.druta@yahoo.com
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_53
523