The rotor is a key element of high-speed mechanisms that are widely used in various industries, such as laboratory centrifuges used to separate mixtures of different fractions, gas turbines, industrial compressors, engines, and others. The main requirement for such mechanisms is reliability and safety during operation. To ensure the above requirements, it is necessary to determine the stress-strain state of the most loaded structural elements of the system and the dynamic characteristics. This paper presents an analysis of the stress-strain state of a rotor system using the example of a Pico21 laboratory centrifuge. The Ansys and KISSsoft software packages were used for 3D modelling of the finite element model. The system consists of a flexible shaft with a rotor, the rotor mass was changed during the simulation and supports, the role of which is performed by bearings. A comparative analysis of the obtained results of the stress-strain state is presented, which further makes it possible to carry out appropriate calculations taking into account stress concentrators to determine the durability and lifetime of high-speed mechanisms. The stresses are determined according to the von Mises and Tresca criteria. The paper also presents the results of the calculation and analyses the natural frequencies of the rotor system. Further studies, it is planned to determine the natural frequencies of vibration, taking into account gyroscopic effects, which are necessary to determine the resonant frequencies and zones of stable operation of the system.
[1] S. M. Ghoneam, et al., "Dynamic analysis of rotor system with active magnetic bearings using finite element method", International Journal of Engineering Applied Sciences and Technology, Vol. 7, Issue 1, ISSN No. 2455-2143, pp. 09-16, 2022.
https://doi.org/10.33564/IJEAST.2022.v07i01.002
[2] S. D. Dere, and L. Dhamande, "Rotor bearing system FEA analysis for misalignment", International journal of advance research and innovative ideas in education, Vol. 3, Issue 4, pp. 2102-2112, 2017.
[3] B. Thomas, et al., "Dynamic analysis of functionally graded shaft", FME Transactions, Vol. 47, Issue 1, pp. 151-157, 2019.
https://doi.org/10.5937/fmet1901151D
[4] N. Lenin Rakesh, et al., "Stress analysis of a shaft using Ansys", Middle-east Journal of Scientific Research, 12 (12), ISSN 1990-9233, pp. 1726-1728, 2012.
[5] B. Gaikwad Rushikesh, and V. Gaur Abhay, "Static and dynamic analysis of shaft (EN24) of foot mounting motor using FEA", International Journal of Innovations in Engineering Research and Technology, Vol. 5, Issue 6, ISSN: 2394-3696, pp. 57-70, 2018.
[6] P. Krishna Teja, et al., "Finite element analysis of propeller shaft for automotive and naval application", International Research Journal of automotive Technology, Vol. 1, Issue 1, ISSN 2581-5865, pp. 8-12, 2018.
[7] A. Asonja, et al., "Analysis of the static behavior of the shaft based on finite method under effect of different variants of load", Applied Engineering Letters, Vol. 1, No. 1, pp. 8-15, ISSN: 2466-4847, 2016.
[8] S. Noga, et al., "Analytical and numerical analysis of injection pump (Stepped) shaft vibrations using Timoshenko theory", Acta mechanica et automatica, Vol. 16, no. 3, pp. 215-224, 2022.
https://doi.org/10.2478/ama-2022-0026
[9] P. B. Sob, "Modelling and simulating stress distribution on a centrifugal pump shaft during backpressure", International Journal of Engineering Research and Technology, Vol. 13, No. 10, ISSN 0974-3154, pp. 2943-2954, 2020.
https://doi.org/10.37624/IJERT/13.10.2020.2943-2954
[10] P. Balon, et al., "Stress concentration analysis of the injection pump shaft", Advances in Science and Technology Research Journal, Vol. 14, Issue 2, pp. 155-162, 2020.
https://doi.org/10.12913/22998624/118945
[11] J. Joshi, et al., "Design analysis of shafts using simulation softwares", International Journal of Scientific and Engineering Research, Vol. 5, Issue 8, ISSN 2229-5518, pp. 751-761, 2014.
[12] M. J. Jweeg, et al., "Dynamic analysis of a rotating stepped shaft with and without defects", IOP Conf. Series: Materials Science and Engineering, 3rd International Conference on Engineering Sciences, Kerbala, Iraq, 2020, Vol. 671.
https://doi.org/10.1088/1757-899X/671/1/012004
[13] S. Culafic, and D. Bajic, "Analytical and numerical analysis of shafts' stress and strain states of the hydro-power unit", International Scientific Journal "Machines. Technologies. Materials", Vol. XV, Issue 8, pp. 294-298, 2021.
[14] C. Gong, et al., "High-strength rotor design for ultra-high speed switched reluctance machines," in IEEE Transactions on Industry Applications, 2020, Volume: 56, Issue: 2, pp. 1432 - 1442.
https://doi.org/10.1109/TIA.2020.2966184
[15] M. E. Gerlach, et al., "Mechanical stress and deformation in the rotors of a high-speed PMSM and IM", Elektrotechnik und Informationstechnik, Vol. 138, Issue 2, pp. 96-109, 2021.
https://doi.org/10.1007/s00502-021-00866-5
[16] N.F.Timerbaev, et al., "Software systems applications for shaft strength analysis in mechanical engineering", Procedia Engineering, Vol. 206, pp. 1376-1381, 2017.
https://doi.org/10.1016/j.proeng.2017.10.648
[17] N. Rasovic, et al., "Design and analysis of steel reel shaft by using FEA", Tehnicki vjesnik, Vol. 26, Issue 2, pp. 527-532, 2019.
https://doi.org/10.17559/TV-20180116103950