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Abstract
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.
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.
Original language | English |
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Title of host publication | Proceedings of SIRM2023: 15th European Conference on Rotordynamics |
Publication status | Published - 23 Feb 2023 |
Event | 15th SIRM – European Conference on Rotordynamics: SIRM 2023 - Technische Universität Darmstadt, Darmstadt, Germany Duration: 22 Feb 2023 → 24 Feb 2023 |
Conference
Conference | 15th SIRM – European Conference on Rotordynamics |
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Abbreviated title | SIRM 2023 |
Country/Territory | Germany |
City | Darmstadt |
Period | 22/02/23 → 24/02/23 |
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Dive into the research topics of 'Numerical investigation of rotor-bearing systems with fractional derivative material damping model'. Together they form a unique fingerprint.Activities
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Numerical investigation of rotor-bearing systems with fractional derivative material damping models
Überwimmer, G. (Speaker)
23 Feb 2023Activity: Talk or presentation › Talk at conference or symposium › Science to science