Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education |
| Herausgeber (Verlag) | American Society of Mechanical Engineers(ASME) |
| ISBN (elektronisch) | 9780791878576, 9780791878576 |
| Publikationsstatus | Veröffentlicht - 2000 |
| Veranstaltung | ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000 - Munich, Deutschland Dauer: 8 Mai 2000 → 11 Mai 2000 |
Publikationsreihe
| Name | Proceedings of the ASME Turbo Expo |
|---|---|
| Band | 4 |
Abstract
The vibration amplitudes of bladed disk assemblies can be reduced significantly by means of friction damping devices such as shrouds, damping wires and interblade friction dampers. In practice, interblade friction dampers are applied in rotating arrangements with various geometries showing curved or flat surfaces like so-called wedge-shaped dampers. This paper is focusing on a computation method to predict the dynamical behaviour of turbine blades with friction dampers including both, curved and wedge-shaped dampers with Hertzian and non- Hertzian contact conditions, respectively. The presented computation method uses a 3D contact model to calculate the contact forces, including normal and tangential stiffnesses, roughness and microslip effects. The relative displacements in the contact area can be expressed by means of 6 DOF of the blade platforms and 6 rigid body DOF of the damper including translational and rotational displacements. The relative displacement of the friction damper with respect to the adjacent blades can be derived from the contact kinematics of the blade-damperblade system and the equations of motion of the friction damper. Thus, the model can be applied to investigate spatialmotions of the bladed disk assembly including bending and torsional vibrations. A comparison of different friction damper designs with respect to an optimal damper geometry and damper mass is presented. The advantages and disadvantages of each design will be discussed. Experimental results are shown to validate the developed computation method.
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- Allgemeiner Maschinenbau
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Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education. American Society of Mechanical Engineers(ASME), 2000. (Proceedings of the ASME Turbo Expo; Band 4).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Optimization of interblade friction damper design
AU - Panning, Lars
AU - Sextro, Walter
AU - Popp, Karl
PY - 2000
Y1 - 2000
N2 - The vibration amplitudes of bladed disk assemblies can be reduced significantly by means of friction damping devices such as shrouds, damping wires and interblade friction dampers. In practice, interblade friction dampers are applied in rotating arrangements with various geometries showing curved or flat surfaces like so-called wedge-shaped dampers. This paper is focusing on a computation method to predict the dynamical behaviour of turbine blades with friction dampers including both, curved and wedge-shaped dampers with Hertzian and non- Hertzian contact conditions, respectively. The presented computation method uses a 3D contact model to calculate the contact forces, including normal and tangential stiffnesses, roughness and microslip effects. The relative displacements in the contact area can be expressed by means of 6 DOF of the blade platforms and 6 rigid body DOF of the damper including translational and rotational displacements. The relative displacement of the friction damper with respect to the adjacent blades can be derived from the contact kinematics of the blade-damperblade system and the equations of motion of the friction damper. Thus, the model can be applied to investigate spatialmotions of the bladed disk assembly including bending and torsional vibrations. A comparison of different friction damper designs with respect to an optimal damper geometry and damper mass is presented. The advantages and disadvantages of each design will be discussed. Experimental results are shown to validate the developed computation method.
AB - The vibration amplitudes of bladed disk assemblies can be reduced significantly by means of friction damping devices such as shrouds, damping wires and interblade friction dampers. In practice, interblade friction dampers are applied in rotating arrangements with various geometries showing curved or flat surfaces like so-called wedge-shaped dampers. This paper is focusing on a computation method to predict the dynamical behaviour of turbine blades with friction dampers including both, curved and wedge-shaped dampers with Hertzian and non- Hertzian contact conditions, respectively. The presented computation method uses a 3D contact model to calculate the contact forces, including normal and tangential stiffnesses, roughness and microslip effects. The relative displacements in the contact area can be expressed by means of 6 DOF of the blade platforms and 6 rigid body DOF of the damper including translational and rotational displacements. The relative displacement of the friction damper with respect to the adjacent blades can be derived from the contact kinematics of the blade-damperblade system and the equations of motion of the friction damper. Thus, the model can be applied to investigate spatialmotions of the bladed disk assembly including bending and torsional vibrations. A comparison of different friction damper designs with respect to an optimal damper geometry and damper mass is presented. The advantages and disadvantages of each design will be discussed. Experimental results are shown to validate the developed computation method.
UR - http://www.scopus.com/inward/record.url?scp=84955104676&partnerID=8YFLogxK
U2 - 10.1115/2000-GT-0541
DO - 10.1115/2000-GT-0541
M3 - Conference contribution
AN - SCOPUS:84955104676
T3 - Proceedings of the ASME Turbo Expo
BT - Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
PB - American Society of Mechanical Engineers(ASME)
T2 - ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000
Y2 - 8 May 2000 through 11 May 2000
ER -