Results 21 to 30 of about 221,137 (269)
Modelling of the bladed disk vibration with damping elements in blade shroud
Applied and Computational Mechanics, 2010 The requirement for wide operation range of steam turbine can cause, that the blades work close to resonant frequency. For decreasing of blade’s vibration there are placed damping elements in the blade shroud.
Kellner J., Zeman V.
doaj +2 more sources
Localization of energy in a perfectly symmetric bladed disk assembly due to nonlinearities
, 2007 Although a bladed disk is typically designed to have identical blades, manufacturing tolerances, wear,and other causes may cause random deviations among the blades. The blade-to-bladediscrepancies, denoted as mistuning, lead to vibratory responses mostly
Maxime Peeters (10571657) +4 more
core +7 more sources
Nihon Kikai Gakkai ronbunshu, 2021 Although bladed disks are nominally designed to be cyclically symmetric (tuned system), the vibration characteristics of all blades on a disk are slightly different due to the manufacturing tolerance, deviations in the material properties, and wear ...
Yasutomo KANEKO +3 more
doaj +1 more source
Mode Localization of a Cracked Blade-Disks [PDF]
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, 1998 In this paper, the effect of blade crack on the mode localization of a rotating blade-disk is studied. Pretwisted taper beams are used to simulate blades of a blade-disk. The crack on the blade can be regarded as a local disorder of this periodically coupled blades system.
J. H. Kuang, B. W. Huang
openaire +1 more source
Blade Manufacturing Tolerances Definition for a Mistuned Industrial Bladed Disk [PDF]
Journal of Engineering for Gas Turbines and Power, 2004 This paper deals with the characterization of the blade manufacturing geometric tolerances in order to get a given level of amplification in the forced response of a mistuned bladed-disk. The theory is based on the use of a nonparametric probabilistic model of blade random uncertainties. The dispersion parameters controlling the nonparametric model are
Capiez-Lernout, Evangéline +4 more
openaire +2 more sources
Vibration reduction optimization for mistuned bladed disk based on reduced order modeling technique [PDF]
, 2020 The arrangement optimization algorithm of blades can reduce the vibration localization of mistuned bladed disk in a compressor of aero-engine, however, it will destroy the dynamic balance of bladed disk. A new arrangement optimization method of isolation
Hongyuan Zhang, Hongyun Sun, Huiqun Yuan
core +1 more source
Shock and Vibration, 2021 Tabu genetic cat swarm optimization algorithm is proposed for optimization arrangement on mistuned blades. Furthermore, it is improved to be an innovative parallel algorithm based on Compute Unified Device Architecture (CUDA), whose performance is ...
Yi Cai +4 more
doaj +1 more source
Research on vibration localization of mistuned bladed disk system [PDF]
, 2017 In order to assess the vibration localization influences of different parameters of structural of the mistuned bladed disk system, the pre-stressed component mode synthesis method was adopted, and reduced-order models (ROMs) of the aero-engine compressor
Tianyu Zhao +3 more
core +2 more sources
Dynamic Analysis of a Bladed Disk With Friction and Fretting-Wear in Blade Attachments [PDF]
Volume 6: Structures and Dynamics, Parts A and B, 2009 Assembled bladed disks have many contact interfaces (blade-disk joint, blade shrouds, friction dampers...). Because of relative displacements at these interfaces, fretting-wear occurs, which affects negatively the lifetime of the structure. Methods exist to predict fretting-wear in quasi-static analysis.
Salles, Loïc +4 more
openaire +1 more source
Detuning Optimization of Nonlinear Mistuned Bladed-Disks
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, 2022 Abstract One major industrial challenge is to consider the detuning as a technological means to reduce the dynamical amplifications induced by mistuning. Due to technological evolutions, the nonlinear geometrical effects induced by the large displacements cannot longer be neglected.
Capiez-Lernout, Evangéline +1 more
openaire +2 more sources