The estimation of the contact stiffness for directly and indirectly coupled turbine blading

authored by: Christian Siewert, Lars Panning, Annika Schmidt-Fellner, Andreas Kayser
Abstract: Forced vibrations can lead to a substantial damage of the blading. To reduce the vibrational amplitudes to reasonable magnitudes, several coupling concepts, like shroud coupling or underplatform dampers, have been developed in the past. Mechanical models for the analysis of the forced response of coupled turbine blading are available. These models include an appropriate contact model to account for the contact, effects like frictional damping, for example. These contact models demand for a stiffness type parameter, this is the so-called contact, stiffness. Unfortunately, there is no straight-forward way for the determination of this parameter. In this paper, simple mechanical models are used for the estimation of the contact stiffness. The estimated contact stiffnesses are then used in forced response computations. The results of these computations are compared to measurements in order to find the most appropriate method for the contact stiffness estimation.
Organisation(s): Institute of Dynamics and Vibration Research
External Organisation(s): Siemens AG
Type: Conference contribution
Pages: 841-853
No. of pages: 13
Publication date: 19.09.2008
Publication status: E-pub ahead of print
Peer reviewed: Yes
ASJC Scopus subject areas: General Engineering
Electronic version(s): https://doi.org/10.1115/GT2006-90473 (Access: Closed)

BibTeX

@inproceedings{04bead02a766450abf2cec1b62f6e001,
title = "The estimation of the contact stiffness for directly and indirectly coupled turbine blading",
abstract = "Forced vibrations can lead to a substantial damage of the blading. To reduce the vibrational amplitudes to reasonable magnitudes, several coupling concepts, like shroud coupling or underplatform dampers, have been developed in the past. Mechanical models for the analysis of the forced response of coupled turbine blading are available. These models include an appropriate contact model to account for the contact, effects like frictional damping, for example. These contact models demand for a stiffness type parameter, this is the so-called contact, stiffness. Unfortunately, there is no straight-forward way for the determination of this parameter. In this paper, simple mechanical models are used for the estimation of the contact stiffness. The estimated contact stiffnesses are then used in forced response computations. The results of these computations are compared to measurements in order to find the most appropriate method for the contact stiffness estimation.",
author = "Christian Siewert and Lars Panning and Annika Schmidt-Fellner and Andreas Kayser",
year = "2008",
month = sep,
day = "19",
doi = "10.1115/GT2006-90473",
language = "English",
isbn = "0791842401",
series = "Proceedings of the ASME Turbo Expo",
pages = "841--853",
booktitle = "Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air",
note = "2006 ASME 51st Turbo Expo ; Conference date: 06-05-2006 Through 11-05-2006",
}