Research Papers: Gas Turbines: Structures and Dynamics

Impulse Mistuning of Blades and Vanes

[+] Author and Article Information
Andreas Hartung

MTU Aero Engines AG,
Munich 80995, Germany
e-mail: andreas.hartung@mtu.de

Ulrich Retze

MTU Aero Engines AG,
Munich 80995, Germany
e-mail: Ulrich.retze@mtu.de

Hans-Peter Hackenberg

MTU Aero Engines AG,
Munich 80995, Germany
e-mail: hans-peter.hackenberg@mtu.de

Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received September 15, 2016; final manuscript received November 21, 2016; published online February 14, 2017. Editor: David Wisler.

J. Eng. Gas Turbines Power 139(7), 072502 (Feb 14, 2017) (9 pages) Paper No: GTP-16-1451; doi: 10.1115/1.4035594 History: Received September 15, 2016; Revised November 21, 2016

Impulse mistuning is an alternative approach for the reduction of vibration stresses of blades and vanes. In contrast to most other approaches, it is not a direct energy dissipation approach but a mistuning based one. However, the approach is not aimed at making use of the geometrical mistuning of the structure (e.g., a blade or a vane stage). Mistuners, specially designed small bodies are placed at specific locations inside of the component, e.g., of a blade or of a vane. They do not directly dissipate enough energy to cause relevant damping like a friction or friction-impact damper, because of the small mass involved, but rather mistune the eigen frequencies of the structure using impulses (impacts). As a result, the structure absorbs less energy at the original resonance and hence answers with lower vibration amplitude. In fact, impulse mistuning is a special case of absorption—the so-called targeted energy transfer (TET) with “vibro-impact nonlinear energy sinks” (VI-NES)—with very small impact mass involved, and thus, a negligible role of dissipation while experiencing a significant amount of absorption. The energy will be transferred (or “pumped”) to other resonances, sometimes outside of the primary resonance crossing and partially dissipated. We use the names “impulse mistuning” or “mistuners” instead of TET or VI-NES because (in our opinion) it better describes the physics of this special kind of absorption. In the paper, the design and validation of two impulse mistuning systems, for a blade stage and a vane cluster of a lower power turbine, are presented.

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Petrov, E. P. , Zachariadis, Z.-I. , Beretta, A. , and Elliott, R. , 2013, “ A Study of Nonlinear Vibrations in a Frictionally Damped Turbine Bladed Disk With Comprehensive Modeling of Aerodynamic Effects,” ASME J. Eng. Gas Turbines Power, 135(3), p. 032504. [CrossRef]
Hartung, A. , and Retze, U. , 2007, “ Damping of a Vane Cluster,” First CEAS European Air and Space Conference (CEAS 2007), Berlin, Germany, Sept. 10-13.
Hollkamp, J. J. , Bagley, R. L. , and Gordon, R. W. , 1999, “ A Centrifugal Pendulum Absorber for Rotating, Hollow Engine Blade,” J. Sound Vib., 219(3), pp. 539–549. [CrossRef]
Duffy, K. P. , Bagley, R. L. , and Mehmed, O. , 2000, “ On a Self-Tuning Impact Vibration Damper for Rotating Turbomachinery,” AIAA Paper No. 2000-3100.
Shaw, S. W. , and Pierre, C. , 2005, “ The Dynamic Response of Tuned Impact Absorbers for Rotating Flexible Structures,” ASME J. Comput. Nonlinear Dyn., 1(1), pp. 13–24. [CrossRef]
Olson, B. J. , Shaw, S. W. , and Pierre, C. , 2005, “ Order-Reduced Vibration Absorbers for Cyclic Rotating Flexible Structures,” ASME Paper No. DETC2005-84641.
Olson, B. J. , and Shaw, S. W. , 2008, “ Vibration Absorber for Cyclic Rotating Flexible Structures: Linear and Nonlinear Tuning,” ASME Paper No. SMASIS08-632.
Hartung, A. , 2004, “ Some Features of Damped BLISKs,” ECCOMAS 2004, Jyväskylä, Finland.
Schirrock, D. , and Hartung, A. , 2009, “ Multi-Body Inside Damping of Hollow Blades,” 16th International Congress on Sound and Vibration (ICSV16), July 5–9, 2009, Kraków, Poland.
Hartung, A. , and Retze, U. , 2011, “ Multi-Body Damping of a Vane Cluster,” ASME Paper No. GT2011-45666.
Lopp, G. K. , and Kaufman, J. K. , 2014, “ Switch Triggers for Optimal Vibration Reduction via Resonance Frequency Detuning,” ASME Paper No. GT2014-27263.
Lee, Y. S. , Nucera, F. , Vakakis, A. F. , McFarland, D. M. , and Bergmann, L. A. , 2009, “ Periodic Orbits, Damped Transitions and Targeted Energy Transfers in Oscillators With Vibro-Impact Attachments,” Physica D, 238(18), pp. 1868–1896. [CrossRef]
Vakakis, A. F. , Gendelman, O. V. , Kerschen, G. , Bergman, L. A. , and McFarland, D. M. , 2008, Nonlinear Targeted Energy Transfer in Mechanical and Structural Systems, I and II, Springer, Berlin, Germany.
Gourdon, E. , Alexander, N. A. , Taylor, C. A. , Lamarque, C. H. , and Pernot, S. , 2007, “ Nonlinear Energy Pumping Under Transient Forcing With Strongly Nonlinear Coupling: Theoretical and Experimental Results,” J. Sound Vib., 300(2007), pp. 522–551. [CrossRef]
Starosvetsky, Y. , and Gendelman, O. V. , 2008, “ Strongly Modulated Response in Forced 2DOF Oscillatory System With Essential Mass and Potential Asymmetry,” Physica D, 237(13), pp. 1719–1733. [CrossRef]
Gendelman, O. V. , 2012, “ Analytic Treatment of a System With a Vibro-Impact Nonlinear Energy Sink,” J. Sound Vib., 331(21), pp. 4599–4608. [CrossRef]
AL-Shudeifat, M. A. , Wierschem, N. , Quinn, D. D. , Vakakis, A. F. , Bergman, L. A. , and Spencer, B. F., Jr. , 2013, “ Numerical and Experimental Investigation of a Highly Effective Single-Sided Vibro-Impact Non-Linear Energy Sink for Shock Mitigation,” Int. J. Nonlinear Mech., 52, pp. 96–109. [CrossRef]
Gourc, E. , Michon, G. , Serguy, S. , and Berlioz, A. , 2015, “ Targeted Energy Transfer Under Harmonic Forcing With a Vibro-Impact Nonlinear Energy Sink: Analytical and Experimental Developments,” ASME J. Vib. Acoust., 137(3), p. 031008. [CrossRef]
Wulf, J. , Busam, S. , Hartung, A. , and Pfützner, P. , 2015, “ Demonstrator Validation of Design Elements for the Next Generation of Geared Fan Engines,” 22nd International Symposium on Air Breathing Engines (ISABE 2015), Phoenix, AZ, Oct. 25-30, Paper No. ISABE-2015-20171.
Panossian, H. V. , 1992, “ Structural Damping Enhancement Via Non-Obstructive Particle Damping Technique,” ASME J. Vib. Acoust., 114(1), pp. 101–105. [CrossRef]
Mueggler, E. , 2010, “ Internship Report,” MTU Aero Engines, Munich, Germany.
Hartung, A. , 2010, “ A Numerical Approach for the Resonance Passage Computation,” ASME Paper No. GT2010-22051.


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Fig. 5

Forced response for the models shown in Figs. 1 and 2, with and without damper (0.5 g)

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Fig. 4

Forced response for the model shown in Fig. 1, with and without a free damper (0.8 g)

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Fig. 3

Forced response for the model shown in Fig. 1, with and without a free damper (0.1 g)

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Fig. 2

Lumped-parameter model from Ref. [8] with a spring loaded damper in a cavity

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Fig. 1

Lumped-parameter model from Ref. [8] with a free moving damper in a cavity

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Fig. 7

Studies of the model shown in Fig. 6 for the damper masses md1… md7, e=0.7 and two different gaps of damper to cavity wall: (a) l1 and (b) l2

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Fig. 8

Studies of the model shown in Fig. 6 for the damper masses md1… md4, e=1.0 and two different gaps of damper to cavity wall: (a) l2 and (b) l1

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Fig. 9

Vane cluster and damper investigated in Ref. [10]

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Fig. 10

Steady-state solution from Ref. [10] in the form of a SMR

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Fig. 11

Analytical prediction of damping (Fig. 9) using abaqus

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Fig. 12

Experimental confirmation of the predicted damping, (Fig. 9; red curve compares with Fig. 11) [10]

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Fig. 15

Analytical prediction of the damping effectiveness of the impulse mistuning system developed for the blade, one of the mode shapes

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Fig. 16

Comparison of the resonance solution with and almost without friction; analytical prediction of the impulse mistuning system, developed for the blade stage

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Fig. 17

Basic functionality of excitation rig

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Fig. 13

Analyzed and tested mode shapes of the blade stage

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Fig. 14

Analytical predictions of the damping effectiveness and robustness of the vane stage impulse mistuning system

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Fig. 19

Excitation rig measurements and analytical prediction for one of the mode shapes of the blade stage



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