Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | 2008 Proceedings of the ASME Turbo Expo |
| Untertitel | Power for Land, Sea, and Air |
| Seiten | 531-542 |
| Seitenumfang | 12 |
| Auflage | PART A |
| Publikationsstatus | Veröffentlicht - Juni 2008 |
| Veranstaltung | 2008 ASME Turbo Expo - Berlin, Deutschland Dauer: 9 Juni 2008 → 13 Juni 2008 |
Publikationsreihe
| Name | Proceedings of the ASME Turbo Expo |
|---|---|
| Nummer | PART A |
| Band | 5 |
Abstract
In this paper, a method for the dynamic analysis of a turbine blading coupled by shrouds and snubbers has been presented. In order to reduce the size of the problem, the modal description has been used in combination with the HBM resulting in a EQM formulated in the modal domain. The revealed system of nonlinear equations is solved in order to obtain the nonlinear frequency response of the blading coupled by shrouds and snubbers. To quantify the amount of damping in the system, the energy dissipation ratio R and the loss factor T||0SS have been defined. To compute these quantities, the energy applied to the blading per cycle, the dissipated energy per cycle and the maximum of the potential energy during a vibration cycle have to be computed. The influence of parameters like the coefficient of friction, the surface roughness or the stimulus on the loss factor have been evaluated numerically for the a real steam turbine blading (ND45A LP LSMB). For the analyzed steam turbine blading, the loss factor determined experimentally and the loss factor determined numerically have been compared. The calculated loss factors are in general in a good agreement to the experimentally determined loss factors. Especially the dependency of the loss factor on the nodal diameter is nearly identical in the numerical and experimental results.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Allgemeiner Maschinenbau
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2008 Proceedings of the ASME Turbo Expo: Power for Land, Sea, and Air. PART A. Aufl. 2008. S. 531-542 (Proceedings of the ASME Turbo Expo; Band 5, Nr. PART A).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Numerical and experimental damping prediction of a nonlinearly coupled low pressure steam turbine blading
AU - Siewert, Christian
AU - Panning, Lars
AU - Gerber, Christoph
AU - Masserey, Pierre Alain
PY - 2008/6
Y1 - 2008/6
N2 - In this paper, a method for the dynamic analysis of a turbine blading coupled by shrouds and snubbers has been presented. In order to reduce the size of the problem, the modal description has been used in combination with the HBM resulting in a EQM formulated in the modal domain. The revealed system of nonlinear equations is solved in order to obtain the nonlinear frequency response of the blading coupled by shrouds and snubbers. To quantify the amount of damping in the system, the energy dissipation ratio R and the loss factor T||0SS have been defined. To compute these quantities, the energy applied to the blading per cycle, the dissipated energy per cycle and the maximum of the potential energy during a vibration cycle have to be computed. The influence of parameters like the coefficient of friction, the surface roughness or the stimulus on the loss factor have been evaluated numerically for the a real steam turbine blading (ND45A LP LSMB). For the analyzed steam turbine blading, the loss factor determined experimentally and the loss factor determined numerically have been compared. The calculated loss factors are in general in a good agreement to the experimentally determined loss factors. Especially the dependency of the loss factor on the nodal diameter is nearly identical in the numerical and experimental results.
AB - In this paper, a method for the dynamic analysis of a turbine blading coupled by shrouds and snubbers has been presented. In order to reduce the size of the problem, the modal description has been used in combination with the HBM resulting in a EQM formulated in the modal domain. The revealed system of nonlinear equations is solved in order to obtain the nonlinear frequency response of the blading coupled by shrouds and snubbers. To quantify the amount of damping in the system, the energy dissipation ratio R and the loss factor T||0SS have been defined. To compute these quantities, the energy applied to the blading per cycle, the dissipated energy per cycle and the maximum of the potential energy during a vibration cycle have to be computed. The influence of parameters like the coefficient of friction, the surface roughness or the stimulus on the loss factor have been evaluated numerically for the a real steam turbine blading (ND45A LP LSMB). For the analyzed steam turbine blading, the loss factor determined experimentally and the loss factor determined numerically have been compared. The calculated loss factors are in general in a good agreement to the experimentally determined loss factors. Especially the dependency of the loss factor on the nodal diameter is nearly identical in the numerical and experimental results.
UR - http://www.scopus.com/inward/record.url?scp=69949168903&partnerID=8YFLogxK
U2 - 10.1115/GT2008-51073
DO - 10.1115/GT2008-51073
M3 - Conference contribution
AN - SCOPUS:69949168903
SN - 9780791843154
T3 - Proceedings of the ASME Turbo Expo
SP - 531
EP - 542
BT - 2008 Proceedings of the ASME Turbo Expo
T2 - 2008 ASME Turbo Expo
Y2 - 9 June 2008 through 13 June 2008
ER -