Abstract
Squeeze-film dampers (SFD) are applied to provide damping at the outer ring of ball bearings used in jet engines. The main functions are to cap rotor oscillations and to reduce dynamic forces. A new test rig was designed to allow an orbital motion of the rotor shaft excited by two independently controllable electromagnetic shakers.
In order to achieve this excitation, the two shakers are rigidly coupled together; due to this, a degree of freedom is missing in this mechanism. The precisely adjusted stiffness of the coupling elements acts as a solid joint to provide the missing DOF. The resulting shear forces acting on the opposite shaker are supported by a support structure, designed as part of the coupling elements. A multibody cosimulation and several other virtual studies are performed to verify and validate the dynamic behavior of the test rig.
The SFD behavior cannot be implemented in the cosimulation by using a standard library damping element of the simulation tools because its behavior is nonlinear due to its design and functionality. It is implemented according to its valid theory, based on Reynolds equations for plain bearings.
The calculation of the multibody physics takes place in MSC Adams, whereas the theory of the SFD is described and implemented as a mathematical model in MATLAB/Simu link. A both-ends-against-the-middle approach is realized and discussed.
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Notes
To play both ends against the middle is a common English idiom. According to [5], it describes the attempt to “gain an advantage by setting opposing parties or interests against one another.” Transferred to the design case in question, it will be the try of getting a benefit by combining different design approaches.
References
Albers, A., Jäger, S., Blutke, R.: Validierung eines Prüfstandes für Quetschöldämpfer mittels rechnerbasierter Methoden. In: Schwingungsdämpfung 2011. VDI-Verlag, Düsseldorf (2011)
Albers, A., Jäger, S., Hessenauer, B.: Rechnergestützte Entwicklung hochdynamisch belasteter Prüfstandskomponenten (2010)
Amirouche, F.M.L.: Fundamentals of Multibody Dynamics: Theory and Applications. Birkhäuser, Boston (2006)
ANSYS Inc.: ANSYS mechanical APDL analysis techniques guide (2010)
Cambridge University Press: Cambridge Idioms Dictionary 2nd edn. Cambridge University Press, Cambridge (2006)
Düser, T.: X-in-the-loop—an integrated validation framework for vehicle development using powertrain functions and driver assistance systems. Dissertation, Universität Karlsruhe, Institut für Produktentwicklung (2010)
Gasch, R., Nordmann, R., Pfützner, H.: Rotordynamik. Springer, Berlin (2002)
Geier, M., Stier, C., Düser, T., Behrendt, M., Ott, S., Albers, A.: Simulationsgestützte Methoden – IDE und XiL zur Entwicklung von Antriebsstrangkomponenten. ATZ, Automobiltech. Z. 14(4), 48–53 (2009)
Jäger, S., Albert, A., Klingsporn, M., Blutke, R.: Study of the tribological contacts of a piston ring in a squeeze film damper. Seal. Technol. 2012(10), 5–6 (2012)
Jäger, S., Bruchmüller, T., Albers, A.: Dynamic behaviour and sealing performance of piston rings used in squeeze-film-dampers. Seal. Technol. 2012(11), 9–13 (2012). doi:10.1016/S1350-4789(12)70485-3
Kim, C., Jung, Y., Cho, S., Jung, H.: Vibration control simulation for a multi-body high speed flexible rotor model using a phase adjusting method. In: ICROS-SICE International Joint Conference, Japan, (2009)
Lobontiu, N.: Compliant Mechanisms: Design of Flexure Hinges. CRC Press, Boca Raton (2003)
San Andres, L.: Squeeze film dampers: operation, models and technical issues (2010)
Schiehlen, W.: Research trends in multibody system dynamics. Multibody Syst. Dyn. 18, 3–13 (2007)
Zhu, C., Liu, Y., Cai, G., Zhu, L.: Dynamics simulation analysis of flexible multibody of parallel robot. Appl. Mech. Mater. 10–12, 647–651 (2008)
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Jäger, S., Vogel, S. Validation of a squeeze-film-damper test rig by using multibody cosimulation. Multibody Syst Dyn 34, 243–257 (2015). https://doi.org/10.1007/s11044-014-9442-7
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DOI: https://doi.org/10.1007/s11044-014-9442-7