Rotor Dynamics of Turbocompressor Based on the Finite Element Analysis and Parameter Identification Approach | Journal of Engineering Sciences

Rotor Dynamics of Turbocompressor Based on the Finite Element Analysis and Parameter Identification Approach

Verbovyi A.1, Khomenko V.1, Neamtu C.2, Pavlenko V.3, Simonovskiy V.1, Pavlenko I.1

1 Sumy State University, 2, Rymskogo-Korsakova St., 40007 Sumy, Ukraine;
2 Technical University of Cluj-Napoca, 28, Memorandumului St., 400114 Cluj-Napoca, Romania;
3 Machine Building College of Sumy State University, 17, Shevchenko Ave., 40011 Sumy, Ukraine

*Corresponding Author’s Address: [email protected]

Issue: Volume 9, Issue 2 (2022)

Submitted: September 5, 2022
Accepted for publication: November 23, 2022
Available online: November 29, 2022

Verbovyi A., Khomenko V., Neamtu C., Pavlenko V., Simonovskiy V., Pavlenko I. (2022). Rotor dynamics of turbocompressor based on the finite element analysis and parameter identification approach. Journal of Engineering Sciences, Vol. 9(2), pp. D1-D5, doi: 10.21272/jes.2022.9(2).d1

DOI: 10.21272/jes.2022.9(2).d1

Research Area:  MECHANICAL ENGINEERING: Dynamics and Strength of Machines

Abstract. The article is devoted to improving methods for designing a finite element model of rotor dynamics. For this purpose, numerical implementation of the authors’ computer program “Critical frequencies of the rotor” was developed based on the computer algebra system MathCAD. As a result of the scientific work, a refined mathematical model of rotor dynamics using finite beam elements was created. This model considers the dependence of the radial stiffness characteristics of the bearing supports on the values of the critical frequencies. The reliability of the mathematical model was justified by the permissible differences of the obtained results within 2% compared with the results of finite element analysis using the ANSYS software. The theorem was also proven by the mutual location of the spectra of the natural and critical frequencies. Overall, the proposed scientific approach reduces preparation and machine time compared to numerical modeling using the ANSYS software without losing the accuracy of the calculations.

Keywords: centrifugal machine, process innovation, critical frequency, finite element analysis, Campbell diagram.


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