| Issue |
MATEC Web Conf.
Volume 148, 2018
International Conference on Engineering Vibration (ICoEV 2017)
|
|
|---|---|---|
| Article Number | 04001 | |
| Number of page(s) | 4 | |
| Section | Modelling, Methodologies and Engineering Applications of Nonlinear Dynamical Systems | |
| DOI | https://doi.org/10.1051/matecconf/201814804001 | |
| Published online | 02 February 2018 | |
A computational study on the influence of the delayed yielding phenomenon in magnetorheological oils on the steady state vibration and forces transmitted between the rotor and its frame
1
Institute of Thermomechanics, Department of Dynamics and Vibrations, Dolejškova 5, 182 00 Prague, Czech Republic
2
VŠB - TU of Ostrava, Department of Applied Mechanics, 17. listopadu 15, 708 33 Ostrava, Czech Republic
3
VŠB - TU of Ostrava, IT4Innovations National Supercomputing Center, 17. listopadu 15, 708 33 Ostrava, Czech Republic
* Corresponding author: jaroslav.zapomel@vsb.cz
The theoretical analyses and practical experience show that only the damping effect adaptable to the current operating conditions makes it possible to achieve optimum performance of damping devices inserted in the supports of rotating machines. This is offered by magnetorheological squeeze film dampers. The magnetorheological oils are liquids sensitive to magnetic induction. Their response to the change of a magnetic field is not instantaneous, but it is a process called the delayed yielding. The research was focused on enhancement of the mathematical model of the magnetorheological squeeze film damper by considering the delayed yielding phenomenon and on its application for the study of the influence of the delayed yielding on the force transmission between the rotor and its stationary part. The results of the computational simulations show that rising value of the delayed yielding time constant that characterizes the delayed yielding process reduces the damping effect and efficiency of the magnetorheological damping devices.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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