Abstract
Under-platform damper is used to attenuate resonant response and further prevent high cycle fatigue failure of turbine blades. The aim of this work is to improve the representation of contact interfaces in modeling an asymmetrical under-platform damper. A new reduced-order contact model with a lumped parameter form is proposed, which is based on a modification of the classical Iwan model. This model can explicitly consider the normal contact pressure on line contact. In modeling process, a method to relate the physical Hertzian normal contact pressure with the probability density function (PDF) of slider sliding force for continuous Iwan model is developed. Experimental results from a laboratory asymmetrical under-platform damper test rig are employed to validate the proposed model. For comparison, different normal contact pressure distributions are considered. The out-of-phase motion of the damper is numerically investigated, and the results show that the proposed model can give an accurate prediction of the damper’s nonlinear mechanics behavior.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Griffin, J.H.: Friction damping of resonant stresses in gas turbine engine airfoils. J. Eng. Power. 102, 329–333 (1980)
Petrov, E.P., Ewins, D.J.: Advanced modelling of underplatform friction dampers for analysis of bladed disk vibration. J. Turbomach. 129(1), 143–150 (2007)
Panning, L., Popp, K., et al.: Asymmetrical underplatform dampers in gas turbine bladings: theory and application. In: Paper No. GT2004-53316, ASME Turbo Expo (2004)
Yang, B.D., Chu, M.L., Menq, C.H.: Stick–slip–separation analysis and non-linear stiffness and damping characterization of friction contacts having variable normal load. J. Sound vib. 210(4), 461–481 (1998)
Menq, C.H., Bielak, J., Griffin, J.H.: The influence of micro-slip on vibratory response, part I: a new micro-slip model. J. Sound Vib. 107(2), 279–293 (1986)
Ciğeroğlu, E.A., Menq, N., H, C.: A micro-slip friction model with normal load variation induced by normal motion. Nonlinear Dyn. 50, 609–626 (2007)
Gastaldi, C., Gola, M.M.: On the relevance of a micro-slip contact model for under-platform dampers. Int. J. Mech. Sci. 115, 145–156 (2016)
Li, D., Xu, C., et al.: A modified Iwan model for micro-slip in the context of dampers for turbine blade dynamics. Mech. Syst. Signal Process. 121, 14–30 (2019)
Iwan, W.D.: A distributed-element model for hysteresis and its steady-state dynamic response. J. Appl. Mech. 33, 893–900 (1966)
Liu, T.: Investigation of under-platform damper kinematics and dynamics. PhD thesis, Politecnico di Torino (2013)
Acknowledgments
The authors would like to acknowledge the financial support by China Science Challenge project (TZ2018007) and the China NSAF project (Grant No. U1530139).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Switzerland AG
About this paper
Cite this paper
Li, D., Xu, C., Gola, M., Botto, D. (2020). Reduced-Order Modeling Friction for Line Contact in a Turbine Blade Damper System. In: Lacarbonara, W., Balachandran, B., Ma, J., Tenreiro Machado, J., Stepan, G. (eds) Nonlinear Dynamics and Control. Springer, Cham. https://doi.org/10.1007/978-3-030-34747-5_20
Download citation
DOI: https://doi.org/10.1007/978-3-030-34747-5_20
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-34746-8
Online ISBN: 978-3-030-34747-5
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)