---
_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: <i>Proceedings of ASME TURBO
    Expo, Power for Land, Sea, and Air</i>. Vol 6. Vienna, Austria; 2004:269-280.
    doi:<a href="https://doi.org/10.1115/GT2004-53316">10.1115/GT2004-53316</a>'
  apa: 'Panning, L., Popp, K., Sextro, W., &#38; Götting, F. (2004). Asymmetrical
    Underplatform Dampers in Gas Turbine Bladings: Theory and Application. In <i>Proceedings
    of ASME TURBO Expo, Power for Land, Sea, and Air</i> (Vol. 6, pp. 269–280). Vienna,
    Austria. <a href="https://doi.org/10.1115/GT2004-53316">https://doi.org/10.1115/GT2004-53316</a>'
  bibtex: '@inproceedings{Panning_Popp_Sextro_Götting_2004, place={Vienna, Austria},
    title={Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and
    Application}, volume={6}, DOI={<a href="https://doi.org/10.1115/GT2004-53316">10.1115/GT2004-53316</a>},
    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 <i>Proceedings
    of ASME TURBO Expo, Power for Land, Sea, and Air</i>, 6:269–80. Vienna, Austria,
    2004. <a href="https://doi.org/10.1115/GT2004-53316">https://doi.org/10.1115/GT2004-53316</a>.'
  ieee: 'L. Panning, K. Popp, W. Sextro, and F. Götting, “Asymmetrical Underplatform
    Dampers in Gas Turbine Bladings: Theory and Application,” in <i>Proceedings of
    ASME TURBO Expo, Power for Land, Sea, and Air</i>, 2004, vol. 6, no. GT2004-53316,
    pp. 269–280.'
  mla: 'Panning, Lars, et al. “Asymmetrical Underplatform Dampers in Gas Turbine Bladings:
    Theory and Application.” <i>Proceedings of ASME TURBO Expo, Power for Land, Sea,
    and Air</i>, vol. 6, no. GT2004-53316, 2004, pp. 269–80, doi:<a href="https://doi.org/10.1115/GT2004-53316">10.1115/GT2004-53316</a>.'
  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'
...