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Chair for Dynamics/Mechatronics
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Prof. Wolfgang Seemann
Prof. Carsten Proppe
Prof. Alexander Fidlin


Karlsruher Institut für Technologie (KIT)
Kaiserstraße 10
Gebäude: 10.23, 2. OG
76131 Karlsruhe

Tel:  +49 721 608-42397
Tel:  +49 721 608-42659
Fax: +49 721 608-46070
dm-sekretariatPiv0∂itm kit edu

Quick guide Dynamics/Mechatronics

Dr.-Ing. Christoph Baum


Abbildung Forschung

Gas Bearings in Rotordynamic Applications

self-excited vibrations

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


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

Abgeschlossene oder vergebene studentische Arbeiten
Title Type Graduand

Jonas Ritter

Tim Leister


Philip Schörner


Marcos Sobrinho



Julian Hofmann


Pascal Himmel


Jan Löwer


Simon Schröders 


Elektra Kleusberg