Numerical investigation of rotor-bearing systems with fractional derivative material damping models

• Autorzy: Überwimmer Gregor , Quinz Georg , Klanner Michael , Ellermann Katrin

Identyfikatory

DOI

10.24425/bpasts.2023.148610

• Języki publikacji: EN

Abstrakty

EN

The increasing demand for high-speed rotor-bearing systems results in the application of complex materials, which allow for a better control of the vibrational characteristics. This paper presents a model of a rotor including viscoelastic materials and valid up to high spin speeds. Regarding the destabilization of rotor-bearing systems, two main effects have to be investigated, which are strongly related to the associated internal and external damping of the rotor. For this reason, the internal material damping is modeled using fractional time derivatives, which can represent a large class of viscoelastic materials over a wide frequency range. In this paper, the Numerical Assembly Technique (NAT) is extended for the rotating viscoelastic Timoshenko beam with fractional derivative damping. An efficient and accurate simulation of the proposed rotor-bearing model is achieved. Several numerical examples are presented and the influence of internal damping on the rotor-bearing system is investigated and compared to classical damping models.

Słowa kluczowe

EN

NAT; Numerical Assembly Technique; rotor-bearing system; steady-state harmonic vibration; unbalance response; fractional derivative damping model

PL

technika montażu numerycznego; układ łożyskowy wirnika; drgania harmoniczne w stanie ustalonym; reakcja na brak równowagi; ułamkowy model tłumienia pochodnego

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2023
• Tom: Vol. 71, nr 6
• Strony: art. no. e148610
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Überwimmer Gregor

• Graz University of Technology, Institute of Mechanics, Kopernikusgasse 24/IV, 8010 Graz, Austria

• https://orcid.org/0000-0001-7986-8280

autor

Quinz Georg

• Graz University of Technology, Institute of Mechanics, Kopernikusgasse 24/IV, 8010 Graz, Austria

autor

Klanner Michael

• Graz University of Technology, Institute of Mechanics, Kopernikusgasse 24/IV, 8010 Graz, Austria

• https://orcid.org/0000-0002-1965-1458

autor

Ellermann Katrin

• Graz University of Technology, Institute of Mechanics, Kopernikusgasse 24/IV, 8010 Graz, Austria

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).