The Influences of Stagger and Pretwist Angles of Blades on Coupling Vibration in Shaft-Disk-Blade Systems

Heydari, Hassan; Khorram, Amir; Afzalipour, L.

doi:10.1115/1.4044991

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…It is reported that more than 60% of faults of shaft–disk–blade assemblies are due to vibration faults. Thus, many scholars have focused on the vibration behaviors of shaft–disk–blade assemblies [ 1 , 2 , 3 ]. However, modern rotating machinery is faced with high temperatures and high pressures under multiple physical fields.…”

Section: Introductionmentioning

confidence: 99%

Parameter Interval Uncertainty Analysis of Internal Resonance of Rotating Porous Shaft–Disk–Blade Assemblies Reinforced by Graphene Nanoplatelets

et al. 2021

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This paper conducts a parameter interval uncertainty analysis of the internal resonance of a rotating porous shaft–disk–blade assembly reinforced by graphene nanoplatelets (GPLs). The nanocomposite rotating assembly is considered to be composed of a porous metal matrix and graphene nanoplatelet (GPL) reinforcement material. Effective material properties are obtained by using the rule of mixture and the Halpin–Tsai micromechanical model. The modeling and internal resonance analysis of a rotating shaft–disk–blade assembly are carried out based on the finite element method. Moreover, based on the Chebyshev polynomial approximation method, the parameter interval uncertainty analysis of the rotating assembly is conducted. The effects of the uncertainties of the GPL length-to-width ratio, porosity coefficient and GPL length-to-thickness ratio are investigated in detail. The present analysis procedure can give an interval estimation of the vibration behavior of porous shaft–disk–blade rotors reinforced with graphene nanoplatelets (GPLs).

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Section: Introductionmentioning

confidence: 99%

Parameter Interval Uncertainty Analysis of Internal Resonance of Rotating Porous Shaft–Disk–Blade Assemblies Reinforced by Graphene Nanoplatelets

et al. 2021

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“…Joachim [20] evaluated the effect of small detuning on the vibration amplitude of a 2D blade disk. Heydari [21] studied the effects of blade stagger angle and pretwist angle on shaft bending and blade bending coupling vibration. Jin [22] revealed the nonlinear vibration characteristics caused by blade-casing rubbings of a real dual rotor aeroengine.…”

Section: Introductionmentioning

confidence: 99%

The Mechanism Revealing and Law Explorating for the Nonlinear Response of Blade Disk Rotor System Under the Coupling Effects of Crack and Aerodynamic Force

Yang¹,

Xie²,

Wang³

et al. 2021

Preprint

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Blade disk rotor system is a typical structure of industrial equipments such as aeroengines and gas turbines. The research on the response characteristics and mechanism of the system under the coupling effects of aerodynamic force and blade crack is of great significance to the interpretation of vibration phenomena and diagnosis of faults. From the numerical solution based response characteristic analysis to the kinematics and dynamics based essential response mechanism revealing, from the model based special case study to the Number Theory based general law establishing, in this paper, the response mechanism of blade disk rotor system under the coupling effects of crack and aerodynamic force is studied comprehensively and deeply. Firstly, a simplified dynamic model of typical blade disk rotor system is constructed by using the classical continuous parameter modeling method. Based on the dynamic model, for two structural forms of moving and stationary blades, the typical characteristics of vibration response under the actions of aerodynamic force and blade crack are analyzed by means of numerical solution. Then, from the perspective of kinematics and dynamics, the internal mechanism between the vibration responses and the excitations are revealed. Finally, based on Number Theory, the response characteristics and mechanism of typical structures are summarized, and the general laws of responses with general structural forms are established.

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“…Joachim 26 evaluated the effect of small detuning on the vibration amplitude of a 2D blade disk. Heydari 27 studied the effects of the blade stagger angle and pre-twist angle on shaft-bending and blade-bending coupling vibration. Jin 28 revealed the nonlinear vibration characteristics caused by blade-casing rubbing of a real dual rotor aeroengine.…”

mentioning

confidence: 99%

The vibration response mechanism of a blade disk rotor system under the coupling effects of cracks and aerodynamic forces

Yang

Xie

Wang

et al. 2022

Sci Rep

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The important role of a dynamic model is to study the response characteristics of a system under different parameters or fault states. These response characteristics can be used in many aspects, such as condition monitoring and fault diagnosis. Usually, the response characteristics can be obtained through numerical analysis, but we do not know why such characteristics appear, which hinders our understanding and utilization of vibration. The innovation of this paper is to reasonably explain why such response characteristics appear. First, a simplified dynamic model of a typical blade disk rotor system is constructed by using the classical continuous parameter modeling method. Based on the dynamic model, for two structural forms of moving and stationary blades, the typical characteristics of the vibration response under the actions of aerodynamic force and blade cracks are analyzed by means of numerical solution. Then, from the perspective of kinematics and dynamics, the internal mechanism between the vibration responses and the excitations is revealed. Finally, based on Number Theory, the response characteristics and mechanisms of typical structures are summarized, and the general laws of responses with general structural forms are established.

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The Influences of Stagger and Pretwist Angles of Blades on Coupling Vibration in Shaft-Disk-Blade Systems

Cited by 8 publications

References 28 publications

Parameter Interval Uncertainty Analysis of Internal Resonance of Rotating Porous Shaft–Disk–Blade Assemblies Reinforced by Graphene Nanoplatelets

Parameter Interval Uncertainty Analysis of Internal Resonance of Rotating Porous Shaft–Disk–Blade Assemblies Reinforced by Graphene Nanoplatelets

The Mechanism Revealing and Law Explorating for the Nonlinear Response of Blade Disk Rotor System Under the Coupling Effects of Crack and Aerodynamic Force

The vibration response mechanism of a blade disk rotor system under the coupling effects of cracks and aerodynamic forces

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