Dynamic characteristics of mistuned bladed disk system under rub-impact force

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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“…According to the reference 33 , the bending and centrifugal potential energy of the ith blade can be given as follows:…”

Section: Vibration Model Of Blade Disk Rotor Systemmentioning

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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“…Rafiee et al [ 11 ] experimentally found that GPLs has the distinct advantage of reinforcing nanofillers over carbon nanotubes at a very low content, which has also been theoretically confirmed [ 12 , 13 , 14 , 15 ]. Zhao et al [ 16 ] studied the rubbing of the mistuned bladed disk system with blades of variable thicknesses, and elastically supported shaft-variable thickness blades coupled with the finite element model was established. Sharma et al [ 17 , 18 ] studied the reduction of sound pressure at the receiver location with a lumped mass at the optimal location, which was shown to be much more than what is achievable by a uniform distribution of the point mass over the plate.…”

Section: Introductionmentioning

confidence: 99%

Free Vibration Analysis of a Graphene-Reinforced Porous Composite Plate with Different Boundary Conditions

Pan

Zhou

et al. 2021

Materials

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Plates are commonly used in many engineering disciplines, including aerospace. With the continuous improvement in the capacity of high value-added airplanes, large transport aircrafts, and fighter planes that have high strength, high toughness, and corrosion resistance have gradually become the development direction of airplane plate structure production and research. The strength and stability of metal plate structures can be improved by adding reinforced materials. This paper studies graphene platelets (GPLs) reinforced with a free vibration porous composite plate. The porous plate is constructed with a multi-layer model in a metal matrix containing uniform or non-uniformly distributed open-cell internal pores. Considering the random and directional arrangement of graphene platelets in the matrix, the elastic modulus of graphene composites was estimated using the Halpin–Tsai micromechanical model, and the vibration frequencies of graphene composite were calculated using the differential quadrature method. The effects of the total number of layers, GPL distribution pattern, porosity coefficient, GPL weight fraction, and boundary conditions on the free vibration frequency of GPLs reinforced porous composite plates are studied, and the accuracy of the conclusions are verified by the finite element software.

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“…It can be found from the above literature review that the vibration localization problem of mistuned bladed-disk system has been studied extensively [33][34][35][36][37][38][39][40][41][42][43]. Many research results have been obtained to be theoretical foundation for design and manufacture.…”

Section: Introductionmentioning

confidence: 99%

Tabu Genetic Cat Swarm Algorithm Analysis of Optimization Arrangement on Mistuned Blades Based on CUDA

Cai

Pan

et al. 2021

Shock and Vibration

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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 analyzed both in continuous and discrete solution space. The lumped parameter model and finite element model of the bladed-disk system are established for dynamics analysis and optimization verification. The complete mistuned parameter identification method and the improved mixed-interface prestressed substructure modal synthesis method are two other highlights. The results indicate that the algorithm in this paper has the advantages of low cost and high efficiency. The vibration localization and amplitude of the mistuned bladed-disk system are both reduced significantly. The optimization analysis method is proved to be applicable to the mistuned bladed-disk system of the aeroengine in engineering practice.

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Dynamic characteristics of mistuned bladed disk system under rub-impact force

Cited by 6 publications

References 26 publications

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

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

Free Vibration Analysis of a Graphene-Reinforced Porous Composite Plate with Different Boundary Conditions

Tabu Genetic Cat Swarm Algorithm Analysis of Optimization Arrangement on Mistuned Blades Based on CUDA

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