Proceedings of the First International Conference on Information Sciences, Machinery, Materials and Energy

Dynamic Response Analysis of Blades with Damping Structures of Shroud and Snubber

Authors
Guoping Li, Qiang Zhang, Wei Zhao, Qin Zhou, Yonghui Xie
Corresponding Author
Guoping Li
Available Online July 2015.
DOI
https://doi.org/10.2991/icismme-15.2015.55How to use a DOI?
Keywords
Friction Damping; Blade; Contact; Response
Abstract
A method is developed to analyze the influence of friction structural damping on the vibration characteristics of turbine blades. Vibratory responses of a long steam turbine blade with shroud and snubber are studied. Finite element contact analysis of the steam turbine blades modeled in 3-D solid elements is conducted to obtain the normal contact force on the shroud contact surface and snubber contact surface of adjacent blades under a serious of different rotational speeds. The stiffness matrix elements and damping matrix elements are built between dry friction contact surface to simulate the frictional characteristics on the contact surface of damper and blade. The results show that with increases in rotational speed, the resonance amplitude decreases first and then increases when there is only shroud contact. The effects are similar when there are both shroud and snubber contact. Under the certain conditions, the increasing of excitation force can also degrade stiffness and damping of shroud and snubber.
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Proceedings
First International Conference on Information Sciences, Machinery, Materials and Energy
Part of series
Advances in Intelligent Systems Research
Publication Date
July 2015
ISBN
978-94-62520-67-7
ISSN
1951-6851
DOI
https://doi.org/10.2991/icismme-15.2015.55How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Guoping Li
AU  - Qiang Zhang
AU  - Wei Zhao
AU  - Qin Zhou
AU  - Yonghui Xie
PY  - 2015/07
DA  - 2015/07
TI  - Dynamic Response Analysis of Blades with Damping Structures of Shroud and Snubber
BT  - First International Conference on Information Sciences, Machinery, Materials and Energy
PB  - Atlantis Press
SP  - 280
EP  - 283
SN  - 1951-6851
UR  - https://doi.org/10.2991/icismme-15.2015.55
DO  - https://doi.org/10.2991/icismme-15.2015.55
ID  - Li2015/07
ER  -