---
_id: '9523'
abstract:
- lang: eng
text: During operation, the rotating blades of a gas turbine are subjected to centrifugal
forces as well as fluctuating gas forces, resulting in blade vibrations. In addition
to material damping, aerodynamical and blade root damping, underplatform dampers
are widely used to increase the amount of damping and to decrease blade vibration
amplitudes. The friction forces generated by the relative displacements between
the underplatform damper and the blade platforms provide a significant amount
of energy dissipation. In practice, a number of different underplatform damper
designs are applied. Basically, these are wedge dampers with flat contact areas,
cylindrical dampers with curved surfaces or asymmetrical dampers with both flat
contact surfaces on one side and curved contact surfaces on the other. The latter
damper type combines the advantages of both the wedge and the cylindrical damper
by preventing the damper from pure rolling on the one hand as it has been observed
for cylindrical dampers and on the other hand, avoiding a diverged plane area
contact in case of a wedge damper, causing a damper lift-off. This paper will
focus on the investigation of cylindrical and asymmetrical underplatform dampers.
A comparison between measurements of rotating assemblies in Siemens PG gas turbines
(V84.2, V64.3A and V94.3A(2)) under test and real operating conditions with cylindrical
and asymmetrical underplatform dampers and the predictions of the developed theoretical
model are presented. Special attention is paid to the frequency shift due to the
application of an underplatform damper, since in particular for stationary gas
turbines, in addition to the amplitude reduction, the accurate prediction of the
resonance frequency is of major interest. Copyright {\copyright} 2004 by ASME
author:
- first_name: Lars
full_name: Panning, Lars
last_name: Panning
- first_name: Karl
full_name: Popp, Karl
last_name: Popp
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Florian
full_name: Götting, Florian
last_name: Götting
citation:
ama: 'Panning L, Popp K, Sextro W, Götting F. Asymmetrical Underplatform Dampers
in Gas Turbine Bladings: Theory and Application. In: Proceedings of ASME TURBO
Expo, Power for Land, Sea, and Air. Vol 6. Vienna, Austria; 2004:269-280.
doi:10.1115/GT2004-53316'
apa: 'Panning, L., Popp, K., Sextro, W., & Götting, F. (2004). Asymmetrical
Underplatform Dampers in Gas Turbine Bladings: Theory and Application. In Proceedings
of ASME TURBO Expo, Power for Land, Sea, and Air (Vol. 6, pp. 269–280). Vienna,
Austria. https://doi.org/10.1115/GT2004-53316'
bibtex: '@inproceedings{Panning_Popp_Sextro_Götting_2004, place={Vienna, Austria},
title={Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and
Application}, volume={6}, DOI={10.1115/GT2004-53316},
number={GT2004-53316}, booktitle={Proceedings of ASME TURBO Expo, Power for Land,
Sea, and Air}, author={Panning, Lars and Popp, Karl and Sextro, Walter and Götting,
Florian}, year={2004}, pages={269–280} }'
chicago: 'Panning, Lars, Karl Popp, Walter Sextro, and Florian Götting. “Asymmetrical
Underplatform Dampers in Gas Turbine Bladings: Theory and Application.” In Proceedings
of ASME TURBO Expo, Power for Land, Sea, and Air, 6:269–80. Vienna, Austria,
2004. https://doi.org/10.1115/GT2004-53316.'
ieee: 'L. Panning, K. Popp, W. Sextro, and F. Götting, “Asymmetrical Underplatform
Dampers in Gas Turbine Bladings: Theory and Application,” in Proceedings of
ASME TURBO Expo, Power for Land, Sea, and Air, 2004, vol. 6, no. GT2004-53316,
pp. 269–280.'
mla: 'Panning, Lars, et al. “Asymmetrical Underplatform Dampers in Gas Turbine Bladings:
Theory and Application.” Proceedings of ASME TURBO Expo, Power for Land, Sea,
and Air, vol. 6, no. GT2004-53316, 2004, pp. 269–80, doi:10.1115/GT2004-53316.'
short: 'L. Panning, K. Popp, W. Sextro, F. Götting, in: Proceedings of ASME TURBO
Expo, Power for Land, Sea, and Air, Vienna, Austria, 2004, pp. 269–280.'
date_created: 2019-04-29T08:19:15Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1115/GT2004-53316
intvolume: ' 6'
issue: GT2004-53316
keyword:
- Dampers
- Gas turbines
language:
- iso: eng
page: 269-280
place: Vienna, Austria
publication: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air
status: public
title: 'Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application'
type: conference
user_id: '55222'
volume: 6
year: '2004'
...