Predict of Nonlinear Dynamic Characteristics and Stability of Aerodynamic Bearing

DOI

10.2991/iccet-15.2015.297How to use a DOI?

Keywords

Aerodynamic bearing; static performance; Dynamic stiffness coefficients; Dynamic damping coefficients; Nonlinear dynamic characteristics.

Abstract

In order to research the transient-state flow field characteristics of spherical spiral groove aerodynamic bearings, the bearing's 3D micro gas film mathematical model was established, and analyzed the 3D gas film pressure field of the bearing based on the FLUENT software of fluid dynamics, and obtained the bearing structure parameters and operation parameters of the maximum bearing load capacity. Based on the maximum bearing capacity, the effects of different speeds and eccentricity ratio on dynamic characteristic coefficients were studied, and to explore the gas bearing’s transient nonlinear dynamic behavior. The axis orbit of the bearing in different speeds is simulated and the stability of bearing is researched. The results show that based on the maximum bearing capacity, a reasonable choice of the bearing speed and eccentricity contributes to improve the dynamic characteristics, and the stability of rotor-bearing system. The paper provides a theoretical prediction to improve the stability of gas bearing in complex environment.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chenhui Jia
AU  - Xiao Meng
AU  - Ming Qiu
PY  - 2015/11
DA  - 2015/11
TI  - Predict of Nonlinear Dynamic Characteristics and Stability of Aerodynamic Bearing
BT  - Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015
PB  - Atlantis Press
SP  - 1592
EP  - 1598
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccet-15.2015.297
DO  - 10.2991/iccet-15.2015.297
ID  - Jia2015/11
ER  -