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Stochastische nichtlineare Rotordynamik unter Berücksichtigung der Einflüsse der hydrodynamischen Gleitlagerung

Rotor dynamics problem has drawn a wide attention due to the constant increasing application of rotating machine in industry. In analysis of rotor dynamics, some linear models are usually employed to study its qualitative analysis. However, to accurately predict its dynamics response, some nonlinear behaviors in rotating system cannot be ignored. For example, in the analysis of rotating systems supported by hydrodynamic bearings, the nonlinear characteristic of lubricant oil-film should be taken into consideration since it may cause the fluid-induced instabilities. In addition, there are some inherent uncertainties in rotor and bearing system which can affect their reliable operation.

In recent works, a rotor-bearing model is widely adopted to study their dynamics behavior, in which the rotor can be mathematically modeled by finite element method and the properties of oil film can be obtained by solving Reynold’s equation.

Overall, this research investigates the nonlinear rotor dynamics considering the effect of hydrodynamic bearing and uncertainties in the whole system. The China Scholarship Council (CSC) provides the support for this research.

Forschungsschwerpunkte:

  • Nichtlineare Rotordynamik
  • Unsicherheitsquantifizierung

Publikationen

2021

  • Liu, Y.; Eser, M.; Sun, X.; Sepahvand, K.; Marburg, S.: Theoretical analysis of a contactless transportation system for cylindrical objects based on ultrasonic levitation. The Journal of the Acoustical Society of America 150 (3), 2021, 1682-1690 mehr… BibTeX Volltext ( DOI )
  • Liu, Yuanyuan; Sun, Xiaodong; Sepahvand, Kian K.; Marburg, Steffen: Theoretical Analysis on the Static and Dynamic Performances of a Squeeze Film Air Journal Bearing with Three Separate Pads Structure. International Journal of Mechanical Sciences, 2021, 106442 mehr… BibTeX Volltext ( DOI )
  • Sun, Xiaodong; Sepahvand, Kian K.; Marburg, Steffen: Stability Analysis of Rotor-Bearing Systems under the Influence of Misalignment and Parameter Uncertainty. Applied Sciences 11 (17), 2021 mehr… BibTeX Volltext ( DOI )

2020

  • Duo Xu , Diana Grill, Yilun Sun, Anand Vazhapilli Sureshbabu, Martin Eser, Tim C. Lüth, Markus Zimmermann: Oberflächenmodellierung eines akustischen Metamaterials und Prototypaufbau mittels additiver Fertigung zur Geräuschreduktion. konstruktion für additive fertigung 2020, 2020 mehr… BibTeX

2019

  • Sun, X.; Sepahvand, K.; Liu, Z.; Marburg, S.: Rotor Dynamics Analysis under Uncertainty in Lubricant Film. Proceedings of the 23rd International Congress on Acoustics, integrating 4th EAA Euroregio , DEGA, 2019Aachen mehr… BibTeX Volltext (mediaTUM)
  • Sun, X.; Sepahvand, K.; Liu, Z.; Marburg, S.: Uncertainty quantification analysis for torsional vibration of crankshaft based on generalized polynomial chaos expansion. Fortschritte der Akustik - DAGA : 45. Jahrestagung für Akustik, 18.-21. März, DEGA e.V., 2019Rostock mehr… BibTeX Volltext (mediaTUM)