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Keywords: Mistuning
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Proceedings Papers

Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A004, June 13–17, 2022
Paper No: GT2022-78101
..., only a single row excites the rotor. The additional downstream row serves as a reflecting wall that reflects physical waves, which leads to interference. The second section of this paper describes the details of the in-house mistuning code utilized to predict the blade responses of the individual...
Proceedings Papers

Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A002, June 13–17, 2022
Paper No: GT2022-78033
...-order mode crossing. This crossing occurs at a slower speed, and higher-order crossings are difficult to predict due to their low response for this configuration. The paper focuses on the multi-row interaction at multiple operating points and the mistuned blade response prediction. The computational...
Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT21A003, June 13–17, 2022
Paper No: GT2022-79761
...Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-79761 Effect of system mode and structural damping perturbation on the mistuned forced response and aerodynamic damping of embedded compressor rotors...
Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT21A016, June 13–17, 2022
Paper No: GT2022-82168
... Abstract Although modern turbomachinery design relies on the tuned blades assumption, mistuning (blade-to-blade variations within each blade row) is known to affect significantly the aeroelastic performance. The structural (frequency) mistuning has been studied extensively in the past, while...
Proceedings Papers

Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A006, June 13–17, 2022
Paper No: GT2022-80643
... Abstract A radial turbine impeller of an exhaust turbocharger is analyzed in view of both free vibration and forced response. Due to random blade mistuning resulting from unavoidable inaccuracies in manufacture or material inhomogeneities, localized modes of vibration may arise, which involve...
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT23A002, June 7–11, 2021
Paper No: GT2021-58779
... located at the Zucrow Laboratory at Keywords: Compressor, Forced Response, Multi-Row, Mistuning, Purdue University. The current paper first addresses the steady Stator Hub Cavities, CFD aerodynamics of a multi-row compressor with hub cavities and talks in detail about the effect of cavities...
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT23A003, June 7–11, 2021
Paper No: GT2021-58780
...Abstract Abstract This paper focusses on predicting the mistuned forced response behavior of an embedded compressor rotor blade row in a 3.5 stage axial compressor. The authors in previous papers studied the multi-row influence on the forcing function for multiple operating conditions...
Proceedings Papers

Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT29A019, June 7–11, 2021
Paper No: GT2021-59283
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59283 MISTUNING AND DAMPING OF A RADIAL TURBINE WHEEL. PART 1: FUNDAMENTAL ANALYSES AND DESIGN OF INTENTIONAL MISTUNING PATTERN Alex Nakos Bernd Beirow Brandenburg...
Proceedings Papers

Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT29A024, June 7–11, 2021
Paper No: GT2021-59528
... for the additional effect of mistuning remains a big challenge in the community. In this paper, the structure is mistuned through the friction coefficient of the dampers and not by altering its geometry, as is usually done in the literature. First, assuming a cyclic symmetric structure, the performance...
Proceedings Papers

Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT29A004, June 7–11, 2021
Paper No: GT2021-58445
... load is large and the variability of frequency is large. friction damper turbine blade contact stiffness of damper variability of frequency mistuning Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-58445...
Proceedings Papers

Proc. ASME. GT2020, Volume 11: Structures and Dynamics: Structural Mechanics, Vibration, and Damping; Supercritical CO2, V011T30A019, September 21–25, 2020
Paper No: GT2020-14941
...ON A NEW NONLINEAR REDUCED-ORDER MODEL FOR CAPTURING INTERNAL RESONANCES IN INTENTIONALLY MISTUNED CYCLIC STRUCTURES Samuel Quaegebeur(a,b Benjamin Chouvion(a), Fabrice Thouverez(a), Loïc Berthe(b) (a) Ecole Centrale de Lyon, LTDS UMR 5513 69130 Ecully France (b) Safran Helicopters Engines 64511...
Proceedings Papers

Proc. ASME. GT2020, Volume 11: Structures and Dynamics: Structural Mechanics, Vibration, and Damping; Supercritical CO2, V011T30A032, September 21–25, 2020
Paper No: GT2020-15508
...Abstract Abstract This paper presents experimental and numerical investigation of mistuned forced responses of an integrally bladed disk with full set of underplatform dampers (UPDs). This research aims at providing: 1. An experimental benchmark for nonlinear dynamics of a mistuned bladed...
Proceedings Papers

Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A012, September 21–25, 2020
Paper No: GT2020-14482
... of interference between the stator and IGV wakes was determined as well. The 4-row case helped investigate physical wave reflections off a downstream rotating row, which had a significant influence on the modal force. The final section of the paper focuses on the mistuning response, which essentially couples...
Proceedings Papers

Proc. ASME. GT2013, Volume 7A: Structures and Dynamics, V07AT32A008, June 3–7, 2013
Paper No: GT2013-95792
... exhibit random mistuning of the blade stiffnesses, and, finally, disks exhibiting random mistuning of both blade stiffness and of the friction forces of the dampers. This latter situation is considered to include the variability induced by manufacturing and wear on the friction dampers. In all cases...
Proceedings Papers

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 1041-1052, June 11–15, 2012
Paper No: GT2012-68084
... 1 Copyright © 2012 by ASME Proceedings of ASME Turbo Expo 2012 GT2012 June 11-15, 2012, Copenhagen, Denmark GT2012-68084 INVESTIGATIONS ON MAXIMUM AMPLITUDE AMPLIFICATION FACTOR OF REAL MISTUNED BLADED STRUCTURES David Hemberger IHI Charging Systems Internatl. 69126 Heidelberg, Germany d.hemberger...
Proceedings Papers

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 649-658, June 14–18, 2010
Paper No: GT2010-22736
... In the design of gas turbine engines, the analysis of nonlinear vibrations of mistuned and frictionally damped blade-disk assembly subjected to random excitation is highly complex. The transitional probability density function (PDF) for the random response of nonlinear systems under white...
Proceedings Papers

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 1103-1116, June 14–18, 2010
Paper No: GT2010-23610
... a simplified finite elements model taking into account Coriolis effect. The paper focuses on the influence of the latter which is most of the time neglected and its implication on the forced response levels is studied into two situations without or with mistuning. bladed disk forced response Coriolis...
Proceedings Papers

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 981-994, June 14–18, 2010
Paper No: GT2010-23062
... 11 01 2011 This paper focuses on the determination of the maximum amplification of blade response due to mistuning in multi stage assemblies. The modal optimization strategy developed earlier in connection with single stage models is extended here to multi stage configurations...
Proceedings Papers

Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 353-362, June 8–12, 2009
Paper No: GT2009-59598
... of freedom (DOFs). Developed bladed disk model is able to take into account external excitation forces phase lag caused by difference between number of rotor and stator blades. Also presence of mistuning was considered. It was shown that certain level of mistuning can directly affect cracked blade...
Topics: Blades, Disks
Proceedings Papers

Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 323-332, June 8–12, 2009
Paper No: GT2009-59580
... 23 02 2010 This paper focuses on the determination of the effects on the bladed disk forced response of small variations (mistuning) in the blade-disk interface properties as may result from blade seating. A blade-interface-disk mean model is first developed that relies on both...