Details
| Original language | English |
|---|---|
| Article number | 38 |
| Number of pages | 11 |
| Journal | International Journal of Turbomachinery, Propulsion and Power |
| Volume | 8 |
| Issue number | 4 |
| Publication status | Published - 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
- Engineering(all)
- Aerospace Engineering
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Mechanical Engineering
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In: International Journal of Turbomachinery, Propulsion and Power, Vol. 8, No. 4, 38, 02.10.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Transient Resonance Passage of a Mistuned Bladed Disk with and without Underplatform Dampers
AU - Brinkmann, Katharina
AU - Hoffmann, Thomas
AU - Panning-von Scheidt, Lars
AU - Stüer, Heinrich
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.
PY - 2023/10/2
Y1 - 2023/10/2
N2 - 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.
AB - 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.
KW - geometric mistuning
KW - transient resonance passage
KW - turbine blade vibration measurement
KW - underplatform damper
UR - http://www.scopus.com/inward/record.url?scp=85180552182&partnerID=8YFLogxK
U2 - 10.3390/ijtpp8040038
DO - 10.3390/ijtpp8040038
M3 - Article
AN - SCOPUS:85180552182
VL - 8
JO - International Journal of Turbomachinery, Propulsion and Power
JF - International Journal of Turbomachinery, Propulsion and Power
IS - 4
M1 - 38
ER -