Results 31 to 40 of about 1,536 (218)
Nihon Kikai Gakkai ronbunshu, 2021 Although bladed disks are nominally designed to be cyclically symmetric (tuned system), the vibration characteristics of all the blades on a disk are slightly different due to the manufacturing tolerance, deviations in the material properties, and wear ...
Yasutomo KANEKO +2 more
doaj +1 more source
A Modified Nonlinear Modal Synthesis Scheme for Mistuned Blisks with Synchronized Switch Damping
International Journal of Aerospace Engineering, 2018 In the authors’ previous work (MSSP 2017), we show that the synchronized switch damping based on negative capacitor (SSDNC) is a good candidate for vibration suppression of tuned blisks.
Jiuzhou Liu +3 more
doaj +1 more source
International Journal of Turbomachinery, Propulsion and Power, 2023 For engines operating using heavy fuel oil (HFO), the nozzle rings of turbocharger turbines are prone to severe degradation because of contamination with unburned fuel deposits. This contamination may lead to increased excitation of blade resonance.
Takashi Ando
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Forced response of Bladed Disks with Damping Mistuning [PDF]
, 2011 The effect of mistuning on the vibration of bladed disks has been extensively studied in the past 30 years. Most of these analysis typically cover the case of small variations of the elastic characteristics (mass and stiffness) of the blades.
Martel Escobar, Carlos +5 more
core +1 more source
Study on Influence of Multi-Parameter Variation of Bladed Disk System on Vibration Characteristics
Applied Sciences, 2021 As the main components of the rotor system of aero-engines and other rotating machinery equipment, the bladed disk system has high requirements on its structure design, safety and stability.
Honggang Pan, Yunshi Wu, Tianyu Zhao
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Structural and aerodynamic mistuning in blade aeroelasticity [PDF]
The blade-to-blade variations, also known as mistuning, are inevitably present in the bladerow due to manufacturing tolerances, assemble processes, as well as wear and tear.
Phan, Hien Minh
core +2 more sources
Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis
Shock and Vibration, 2021 An improved component modal synthesis-based nonproportional mistuning method (ICMS-NPMM) is proposed to investigate mistuned turbine blisks (MTBs) since the high-fidelity finite element models (HFEMs) involve large number of computations, which leads to ...
Bin Bai +4 more
doaj +1 more source
Identification of Mistuning and Model Updating of an Academic Blisk Based on Geometry and Vibration Measurements [PDF]
, 2015 peer reviewedIn this work, an experimental modal analysis is performed on an academic bladed disk using a base excitation to identify the mistuning of each blade. Optical measurement is used to obtain the exact geometry of the structure and to be able to
Nyssen, Florence, Golinval, Jean-Claude
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Analysis of the Worst Mistuning Patterns in Bladed Disk Assemblies [PDF]
, 2003 The problem of determining the worst mistuning patterns is formulated and solved as an optimization problem. Maximum resonant amplitudes searched across the many nodes of a large-scale finite element model of a mistuned bladed disk and across all the ...
Yevgen Petrov (4463476) +3 more
core +1 more source
Study on vibration characteristics and stability of steam turbine vanes with large capacity
Nihon Kikai Gakkai ronbunshu, 2016 A vane used in a low pressure end of steam turbine is usually fixed to an inner shroud and an outer ring by welding both ends. In such a vane structure, the damping in loading operation is comprised of the material damping and the aerodynamic damping ...
Yasutomo KANEKO +3 more
doaj +1 more source