Mistuning Identification Technique Based on Blisk Detuning

Lupini, Andrea; Shim, Justin; Callan, Sarah; Epureanu, Bogdan I.

doi:10.2514/1.j060209

Cited by 7 publications

(6 citation statements)

References 21 publications

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“…The measured frequency of the single blade is in fact linked not only to the inherent blade mistuning, but also to the residual inter-blade coupling, which is largely governed by the quantity and location of the detuning masses attached on the remaining blades. Inspired by a previous research [15], a novel linear relationship is hereby proposed and formulated as:…”

Section: Mistuning Identification Based On Blade Detuning Testmentioning

confidence: 99%

“…It relies on the simulations of the experimental process and on the iterative update of the blade stiffness parameters based on either a mass-spring-damper blisk model [12] or a full finite element blisk model [13] or even a reduced order blisk model [14]. More recently in [15], it was numerically highlighted that inter-blade coupling is responsible for the inaccurate blade mistuning identification through blade detuning tests. These authors proposed a methodology capable of capturing the residual inter-blade coupling effect for the purpose of blade mistuning identification.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exploration of blade detuning tests for mistuning identification of blisks

Zhou

Zhao

Berruti

2022

Mechanical Systems and Signal Processing

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Section: Mistuning Identification Based On Blade Detuning Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploration of blade detuning tests for mistuning identification of blisks

Zhou

Zhao

Berruti

2022

Mechanical Systems and Signal Processing

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“…[6][7][8][9][10] The mistuning will lead to more complicated vibration localization. [11][12][13][14] The mistuning may cause vibration localization leading to premature high-cycle fatigue. 15 A perturbation method is proposed to study mode localization and vibration localization.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of vibration localization of mistuned bladed disk due to shroud and blade damages

Kan,

Wang,

Zhao

2023

Journal of Low Frequency Noise, Vibration and Active Control

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Dynamic behaviors of turbine blades are important for the dynamic design of whole-bladed disk systems. The bladed disk systems with shrouds are used to achieve advanced functions in operation. The shrouds are used to connect several blades as a bladed packet, and several bladed packets are assembled as a bladed disk. Previous researches mainly focus on the mistuning of the bladed disk. However, in operation, the shrouds often suffer damage and wear, and it will lead to shrouds mistuning. The shroud is a critical component for adjusting the coupling strength of the blade to the blade. The innovation of this paper is to study the coupling dynamics problem caused by blade mistuning and shroud damage. The localized vibration of the bladed disk is caused by the blade mistuning, and the shroud damage can also cause the localized vibration of the bladed disk. The coupling dynamic behaviors of bladed disk caused by blade mistuning and shroud damage are important. Therefore, the dynamic behaviors of a mistuned bladed disk with the shroud are important for the bladed disk. A numerical method is conducted to investigate the dynamic characteristics of the whole bladed disk with shroud. The coupling effect between shroud and blade mistuning on the dynamic behaviors of the bladed disk is researched. The numerical model is validated by assuming the shroud and blade mistuning is zero. The coupling effect of shroud and blade mistuning leads to the characteristics being more complicated. Bladed packet is the basic part of the bladed disk with shroud. In order to study the modal characteristics of bladed packets due to shroud, an experiment is conducted. It is worth noting that the first sub remains invariable with the increasing of stiffness ratio.

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“…Such technology is particularly relevant because it is a way for reducing the response amplification levels that are induced by the unavoidable random mistuning while increasing its robustness. It has been thoroughly studied in the framework of linear dynamics [37,38,39,40,41,42,43,44,45,46].…”

Section: Introductionmentioning

confidence: 99%