Dr.-Ing. Christoph Baum

  • Karlsruher Institut für Technologie (KIT)
    Kaiserstraße 10
    Gebäude: 10.23
    76131 Karlsruhe

Gas Bearings in Rotordynamic Applications

Gas Bearings in Rotordynamic Applications
nichtlineare Rotor- und Lagerdynamik

The two major advantages of gas bearings compared to other lubricated bearings are inherently low viscosities and their chemical stability over a wide temperature range. Furthermore, the usage of gas lubrication can lead to auxiliary benefits, depending on the application. For example, a simpler lubrication supply, a contamination free environment, less maintenance and less noise generation. All these reason could additionally lead to reduced manufacturing- and maintenance costs.

Unfortunately, in gas bearing mounted rotors are prone for instabilities. Reasons are, for example, the low viscosity of the fluid film, resulting in a low damping characteristic and self-excited vibrations, caused by the bearing reacting forces. Consequently, a proper designing- and dimensioning process of the rotor-bearing system can be very extensive.

In order to identify the physical effects, derivate design guidelines for rotor-bearing-systems and detect the limitations of gas bearing technology, gas bearing – rotor interactions are studied. Currently, the focus is on time-efficient nonlinear bearing modelling for rotor dynamic simulation, as well as stability- and bifurcation analysis of the rotor.

Contact: Prof. W. Seemann, C. Baum


T. Leister, C. Baum, W. Seemann,
Computational Analysis of Foil Air Journal Bearings Using a Runtime-Efficient Segmented Foil Model
Proc. of ISROMAC-16, 2016, Honolulu

C. Baum, T. Leister, W. Seemann,
Foil Air Bearing Rotor Interaction - Bifurcation Analysis of a Lavalrotor
Euromech Colloquium 573 - Coupling and nonlinear interactions in rotationg machinery 2015, Lyon

C. Baum, H. Hetzler, W. Seemann,
On the Stability of Balanced Rigid Rotors in Air Foil Bearings,
Proc. of SIRM 2015, Magdeburg

C. Baum, H. Hetzler, W. Seemann:
On the dynamics of a rigid rotor with static unbalance symmetrically mounted in compliant air bearings
9th IFToMM Intern. Conference on Rotor Dynamics, 2014, Milan

C. Baum, H. Hetzler, W. Seemann:
On the dynamics of a rigid rotor in air bearings with linear elastic bearing housings,
Proc. of ISROMAC-15, 2014, Honolulu

J. Wauer, H. Hetzler, C. Baum,
Damping Effects on Stabilizing Rotating Non-Circular Shafts Subjected to Pulsating Axial Force,
Proc. of Intl. Symp. on Vibration of Continuous Systems (ISVCS), 2013, Courmayeur

C. Baum, A. Boyaci, W. Seemann,
Modellierung und Analyse von kurzen Gleitlagern mit linear-elastischen Lagerwänden,
Proc. of SIRM 2013, Berlin

Betreute Lehrveranstaltungen

SS 15 Übungen zu Mathematische Methoden der Schwingungslehre
WS 14/15 Mechatronik-Praktikum
SS 14 Dynamics Lab
SS 14 Übungen zu Einführung in die Mehrkörperdynamik
WS 13/14 Übungen zu Technische Mechanik III
WS 13/14 Engineering Mechanics III (Tutorial)
SS 13 Übungen zu Einführung in die Mehrkörperdynamik
WS 12/13 Übungen zu Modellbildung und Simulation
SS 12 Übungen zu Technische Mechanik IV
WS 11/12 Übungen zu Technische Mechanik III
WS 11/12 Tutorial Engineering Mechanics III
SS 11 Übungen zu Einführung in die Mehrkörperdynamik