A harmonic mistuning concept for bladed disks is analyzed in order to intentionally reduce the forced response of specific modes below their tuned amplitude level. By splitting a mode pair associated with a specific nodal diameter pattern, the lightly damped traveling wave mode of the nominally tuned blisk is superposed with its counter-rotating complement. Consequently, a standing wave is formed in which the former wave train benefits from an increase in aerodynamic damping. Unlike previous analyses of randomly perturbed configurations, the mode-specific stabilization is intentionally promoted through adjusting the harmonic content of the mistuning pattern (MT). Through a reorientation of the localized mode shapes in relation to the discrete blades, the response is additionally attenuated by an amount of up to 7.6%. The achievable level of amplitude reduction is analytically predicted based on the properties of the tuned system. Furthermore, the required degree of mistuning for a sufficient separation of a mode pair is derived.
Skip Nav Destination
Article navigation
December 2018
Research-Article
Intentional Response Reduction by Harmonic Mistuning of Bladed Disks With Aerodynamic Damping
Sebastian Willeke,
Sebastian Willeke
Institute of Dynamics and Vibration Research,
Leibniz University,
Hannover 30167, Germany
e-mail: willeke@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: willeke@ids.uni-hannover.de
Search for other works by this author on:
Lukas Schwerdt,
Lukas Schwerdt
Institute of Dynamics and Vibration Research
Leibniz University,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Search for other works by this author on:
Lars Panning-von Scheidt,
Lars Panning-von Scheidt
Institute of Dynamics and Vibration Research,
Leibniz University,
Hannover 30167, Germany
e-mail: panning@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: panning@ids.uni-hannover.de
Search for other works by this author on:
Jörg Wallaschek
Jörg Wallaschek
Institute of Dynamics and Vibration Research,
Leibniz University,
Hannover 30167, Germany
e-mail: wallaschek@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: wallaschek@ids.uni-hannover.de
Search for other works by this author on:
Sebastian Willeke
Institute of Dynamics and Vibration Research,
Leibniz University,
Hannover 30167, Germany
e-mail: willeke@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: willeke@ids.uni-hannover.de
Lukas Schwerdt
Institute of Dynamics and Vibration Research
Leibniz University,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Lars Panning-von Scheidt
Institute of Dynamics and Vibration Research,
Leibniz University,
Hannover 30167, Germany
e-mail: panning@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: panning@ids.uni-hannover.de
Jörg Wallaschek
Institute of Dynamics and Vibration Research,
Leibniz University,
Hannover 30167, Germany
e-mail: wallaschek@ids.uni-hannover.de
Leibniz University,
Hannover 30167, Germany
e-mail: wallaschek@ids.uni-hannover.de
1Corresponding author.
Manuscript received June 22, 2018; final manuscript received July 2, 2018; published online October 24, 2018. Editor: Jerzy T. Sawicki.
J. Eng. Gas Turbines Power. Dec 2018, 140(12): 121010 (10 pages)
Published Online: October 24, 2018
Article history
Received:
June 22, 2018
Revised:
July 2, 2018
Citation
Willeke, S., Schwerdt, L., Panning-von Scheidt, L., and Wallaschek, J. (October 24, 2018). "Intentional Response Reduction by Harmonic Mistuning of Bladed Disks With Aerodynamic Damping." ASME. J. Eng. Gas Turbines Power. December 2018; 140(12): 121010. https://doi.org/10.1115/1.4040898
Download citation file:
Get Email Alerts
Cited By
Cooled Spray Technology for Particulate Reduction in a Heavy-Duty Engine
J. Eng. Gas Turbines Power
Prediction and Analysis of Transient Turbine Tip Clearance Using Long Short-Term Memory Neural Network
J. Eng. Gas Turbines Power
Gas Turbine's Role in Energy Transition
J. Eng. Gas Turbines Power (October 2024)
The Effect of Swirl Number on Lean Blow Out Limits of Lean Direct Injection Combustors
J. Eng. Gas Turbines Power (October 2024)
Related Articles
Reduction of Forced Response Levels for Bladed Disks by Mistuning: Overview of the Phenomenon
J. Eng. Gas Turbines Power (July,2011)
A Method for Forced Response Analysis of Mistuned Bladed Disks With Aerodynamic Effects Included
J. Eng. Gas Turbines Power (June,2010)
The Amplification of Vibration Response Levels of Mistuned Bladed Disks: Its Consequences and Its Distribution in Specific Situations
J. Eng. Gas Turbines Power (October,2011)
Related Proceedings Papers
Related Chapters
Nonlinear Analysis of a Tapered Disk Thermal Fatigue Specimen
Thermal Fatigue of Materials and Components
Low-Cycle Fatigue Analysis of the Turbine Disk for the National Aeronautics and Space Administration High-Temperature Turbine Rig
Thermal Fatigue of Materials and Components
Circular Flux Tubes and Disks
Thermal Spreading and Contact Resistance: Fundamentals and Applications