Results 191 to 200 of about 1,536 (218)

On the Benefits of Intentional Mistuning of Friction Dampers to Reduce the Response of Tuned and Mistuned Bladed Disks

Volume 7A: Structures and Dynamics, 2013
This paper investigates the potential benefits resulting from using two different types of friction dampers on a bladed disk. In this scenario, every blade or platform is equipped with a damper of either type A or type B with these two types differing by their friction forces.
Raghavendra Murthy, Marc P. Mignolet
openaire   +1 more source

Mistuned Response Prediction of Dual Flow-Path Integrally Bladed Rotors With Geometric Mistuning

Journal of Engineering for Gas Turbines and Power, 2015
The geometric mistuning problem is investigated for dual flow-path integrally bladed rotors (DFIBRs) by outlining two methods that explicitly account for blade geometry surface deviations. The methods result in reduced-order models (ROMs) that are a reduced form of a parent Craig–Bampton component mode synthesis (CB-CMS) model.
Joseph A. Beck, Jeffrey M. Brown, Alexander A. Kaszynski, Joseph C. Slater, Charles J. Cross   +4 more
openaire   +1 more source

Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model: Part 2 — Application

Volume 4: Turbo Expo 2003, 2003
This paper is the second in a two-part study of identifying mistuning in bladed disks. It presents experimental validation of a new method of mistuning identification based on measurements of the vibratory response of the system as a whole. As a system based method, this approach is particularly suited to integrally bladed rotors, whose blades cannot ...
D. M. Feiner, J. H. Griffin
openaire   +1 more source

Phantom beats in mistuned chords

The Journal of the Acoustical Society of America, 1983
Beats are heard in slightly mistuned musical intervals. For example, a mistuned fifth with frequencies f1 = 804 Hz and f2 = 1204 Hz will produce 4 beats per second. These beats have been attributed to interaction between the 3rd harmonic of f1 at 2412 Hz and the 2nd harmonic of f2 at 2408 Hz.
J. L. Hall, M. V. Mathews, L. A. Roberts
openaire   +1 more source

Binaural beats of mistuned consonances

The Journal of the Acoustical Society of America, 1994
In a previous paper [M. P. Feeney and E. M. Burns, J. Acoust. Soc. Am. 93, 2346(A) (1993)] data on the detection of dichotic beats of mistuned consonances (BMCs) were presented. The results showed that subjects could detect mistuning from small-integer frequency ratios for simultaneous-dichotic pure-tones in a 2I-2AFC task.
M. Patrick Feeney, Edward M. Burns
openaire   +1 more source

Impulse Mistuning of Blades and Vanes

Journal of Engineering for Gas Turbines and Power, 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 ...
Andreas Hartung, Ulrich Retze, Hans-Peter Hackenberg   +2 more
openaire   +1 more source

Optimization and Mechanisms of Mistuning in Cascades

Journal of Engineering for Gas Turbines and Power, 1985
An inverse design procedure has been developed for the optimum mistuning of a high bypass ratio shroudless fan. The fan is modeled as a cascade of blades, each with a single torsional degree of freedom. Linearized supersonic aerodynamic theory is used to compute the unsteady aerodynamic forces in the influence coefficient form at a typical blade ...
E. F. Crawley, K. C. Hall
openaire   +1 more source

Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model—Part I: Theory

Journal of Turbomachinery, 2004
This paper is the first in a two-part study of identifying mistuning in bladed disks. It develops a new method of mistuning identification based on measurements of the vibratory response of the system as a whole. As a system-based method, this approach is particularly suited to integrally bladed rotors, whose blades cannot be removed for individual ...
D. M. Feiner, J. H. Griffin
openaire   +1 more source

Capturing Mistuning Within Shrouded Integrally Bladed Disks With the Generalized Model of Mistuning

Volume 9: Structures and Dynamics: Structural Mechanics & Vibration; Supercritical CO2
Abstract Bladed disks and blisks are designed to be cyclic structures that ideally have identical sectors. There will, however, always be mistuning, which is blade to blade differences that break the cyclic symmetry of the system and can result in an increase in vibrational amplitudes.
Troy Krizak, Kiran D'Souza
openaire   +1 more source

Flutter of Mistuned Turbomachinery Rotors

Journal of Engineering for Gas Turbines and Power, 1984
An investigation of the fundamental aspects of flutter in mistuned turbomachinery rotors is presented. Perturbation methods are used to obtain asymptotic solutions to arbitrary order in the mistuning parameter. These solutions require only the knowledge of the eigensolution of the tuned system, and thus provide efficient formulas for calculating the ...
openaire   +1 more source