Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Katharina Brinkmann
  • Thomas Hoffmann
  • Lars Panning-von Scheidt
  • Heinrich Stüer

External Research Organisations

  • Siemens AG
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Details

Original languageEnglish
Article number38
Number of pages11
JournalInternational Journal of Turbomachinery, Propulsion and Power
Volume8
Issue number4
Publication statusPublished - 2 Oct 2023

Abstract

In this work, the vibration response of an academic free-standing turbine blisk is analyzed in regard to transient resonance passages. Measurement data are recorded using strain gauges and tip timing to evaluate the blades first bending mode both linearly and with two different types of underplatform dampers. These results are validated against steady-state responses and show good agreement with each other. To examine the effects of a transient resonance passage, response functions of each blade are evaluated both with and without the underplatform dampers. It is shown that friction damping is able to inhibit any appearance of a transient ring-down. Additionally, a multi-mass oscillator model with frictional contacts is analyzed, which qualitatively exhibits the same dynamics as the measurements. Due to geometric mistuning, all blades exhibit different vibration responses. This can lead to a transient amplitude amplification, which is observed on several blades. Analogously, this phenomenon can be mitigated by friction damping.

Keywords

    geometric mistuning, transient resonance passage, turbine blade vibration measurement, underplatform damper

ASJC Scopus subject areas

Cite this

Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers. / Brinkmann, Katharina; Hoffmann, Thomas; Panning-von Scheidt, Lars et al.
In: International Journal of Turbomachinery, Propulsion and Power, Vol. 8, No. 4, 38, 02.10.2023.

Research output: Contribution to journalArticleResearchpeer review

Brinkmann, K, Hoffmann, T, Panning-von Scheidt, L & Stüer, H 2023, 'Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers', International Journal of Turbomachinery, Propulsion and Power, vol. 8, no. 4, 38. https://doi.org/10.3390/ijtpp8040038
Brinkmann, K., Hoffmann, T., Panning-von Scheidt, L., & Stüer, H. (2023). Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers. International Journal of Turbomachinery, Propulsion and Power, 8(4), Article 38. https://doi.org/10.3390/ijtpp8040038
Brinkmann K, Hoffmann T, Panning-von Scheidt L, Stüer H. Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers. International Journal of Turbomachinery, Propulsion and Power. 2023 Oct 2;8(4):38. doi: 10.3390/ijtpp8040038
Brinkmann, Katharina ; Hoffmann, Thomas ; Panning-von Scheidt, Lars et al. / Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers. In: International Journal of Turbomachinery, Propulsion and Power. 2023 ; Vol. 8, No. 4.
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title = "Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers",
abstract = "In this work, the vibration response of an academic free-standing turbine blisk is analyzed in regard to transient resonance passages. Measurement data are recorded using strain gauges and tip timing to evaluate the blades first bending mode both linearly and with two different types of underplatform dampers. These results are validated against steady-state responses and show good agreement with each other. To examine the effects of a transient resonance passage, response functions of each blade are evaluated both with and without the underplatform dampers. It is shown that friction damping is able to inhibit any appearance of a transient ring-down. Additionally, a multi-mass oscillator model with frictional contacts is analyzed, which qualitatively exhibits the same dynamics as the measurements. Due to geometric mistuning, all blades exhibit different vibration responses. This can lead to a transient amplitude amplification, which is observed on several blades. Analogously, this phenomenon can be mitigated by friction damping.",
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N1 - Funding Information: The investigations were conducted as part of the joint research program InnoTurbinE in the frame of AG Turbo. The work was supported by the Bundesministerium für Wirtschaft und Klimaschutz (BMWK) as per resolution of the German Federal Parliament under grant number 03EE5040A. The authors gratefully acknowledge Siemens Energy AG for their financial support and the permission to publish this paper. The responsibility for the content of the publication rests with the authors.

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