Rub-impact dynamic analysis of the central tie rod rotor-blade-casing coupling system with the Hirth couplings connection

Jin, Miao; Wang, Ailun; Wang, Qingshan; Wang, Longkai

doi:10.1007/s42417-023-00921-9

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…Saeed et al [24] studied the stability, bifurcation characteristics, and vibration control of a discontinuous dynamic model. Jin et al [25] analyzed the friction characteristics of the rotor-blade-shell system caused by the reduced asphyxiation of the Hess coupling. The results show that the closer the blade is to the shell, the more serious the friction is.…”

Section: Introductionmentioning

confidence: 99%

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Nan,

Yang,

2024

Applied Sciences

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When the dual rotor system of the aircraft engine is operating, the mass eccentricity of the power turbine rotor and the misalignment of the shaft coupling or the bearing will cause too large vibration of the rotor; this vibration leads to the rub-impact between the rotor and the casing. The power turbine rotor from the dual rotor system is taken as the research object in this paper. Considering the misalignment, the resulting rub-impact faults, the imbalance of rotor and the disk offset, the equation of motion for the system is developed according to the Lagrangian Equation, and then the Range-Kutta Method is adopted to solve the equation. The influence of the key parameters such as the rotating speed, the misalignment angle and the rub-impact clearance on the dynamics of the system is studied; the finite element analysis was carried out to validate the correctness of the theoretical modeling method. The results show that the rub-impact increases the stiffness of the system; the Hopf bifurcation occurs in the misalignment and rub-impact coupling system; the vibrational stability near the half of the switching speed slumps with the increase of the misalignment angle; with increasing of the stiffness, the number of the chaotic zone increases, and the range of the chaos is widening; enlarging the rub-impact clearance is beneficial to reduce the degree of the rub-impact system and enhance the stability of the system.

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Section: Introductionmentioning

confidence: 99%

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Nan,

Yang,

2024

Applied Sciences

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Investigation on dynamic rubbing characteristics of a bladed rotor system with multi-mode rubbing fault

Tang,

Wang,

Wang

et al. 2025

Journal of Sound and Vibration

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Study on Rubbing-Induced Vibration Characteristics Considering the Flexibility of Coated Casings and Blades

Zhang,

Yang,

Tai

et al. 2024

Machines

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Rubbing between a blade and its coated casing is one of the main failures in aero-engine systems. This paper aims to study the effects of coated casings on rubbing-induced dynamic responses considering the flexibility of the coated casing and the flexibility of the blade. Firstly, an actual compressor blade is established by the shell element and verified by the experiment and ANSYS 19.2 software. Subsequently, a new dynamic model for the coated casing is proposed based on the laminated shell element, and the proposed dynamic model for the coated casing is verified by comparing the natural characteristics calculated by ANSYS software. Moreover, a comprehensive analysis is conducted to analyze the influences of the casing model, coating parameters, and casing parameters on vibration characteristics. Finally, the results show that the coating can diminish the severity level of rubbing. Notably, the material and thickness of the coating can change the nodal diameter vibrations of the casings (NDVCs) induced by rubbing. This study provides valuable guidance for the optimization and design of blade–casing systems.

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Rub-impact dynamic analysis of the central tie rod rotor-blade-casing coupling system with the Hirth couplings connection

Cited by 4 publications

References 23 publications

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Investigation on dynamic rubbing characteristics of a bladed rotor system with multi-mode rubbing fault

Study on Rubbing-Induced Vibration Characteristics Considering the Flexibility of Coated Casings and Blades

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