Shaft-flexibility-induced hydrodynamic support redistribution and modal response in a multi-support bearing-rotor system

Zhang, Yulin; Li, Bing; Xu, Wubin; Guo, Hanyu; Yuan, Yanpeng

doi:10.5194/ms-17-857-2026

Articles | Volume 17, issue 2

https://doi.org/10.5194/ms-17-857-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/ms-17-857-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 2

Research article

|

18 Sep 2026

Research article |

| 18 Sep 2026

Shaft-flexibility-induced hydrodynamic support redistribution and modal response in a multi-support bearing-rotor system

Yulin Zhang, Bing Li, Wubin Xu, Hanyu Guo, and Yanpeng Yuan

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Short summary

Flexible shafts supported by several oil-lubricated bearings can bend under local loads, changing how the bearings carry the rotor. This study shows that end loading strongly alters the oil-film support near the loaded end and redistributes support along the shaft. These local changes reshape the first bending mode more clearly than they shift the main low-order critical speed.