Influence of Fir-Tree Tenon Blade Parameters on Blade Dynamic Characteristics

Article Mechanics

A new method of micro-slip contact normal pressure modeling and its application in the dynamic analysis of the dovetail-tenon-mortise jointed blades

Zilin Chen et al.

Summary: In this paper, a contact slip mechanics model based on pressure distribution is developed to define the contact behavior between contact interfaces. The model is validated using a finite element model and the theory of load equivalence.

MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES (2023)

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Review Engineering, Mechanical

A review of vibration-based gear wear monitoring and prediction techniques

Ke Feng et al.

Summary: Vibration analysis is widely used to monitor the operating condition of rotating machinery, but its application in gear wear analysis is limited. This review aims to fill this research gap by studying the relationship between gear surface features and vibration characteristics, and summarizing the current progress in vibration-based gear wear monitoring.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2023)

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Article Acoustics

Blade reduced model considering local contact and analyzing blade vibration characteristics

Chaofeng Li et al.

Summary: A dynamic model of a tenoned rotating blade considering the pressure distribution characteristics of the contact interface is established, and the degree of freedom of the model is reduced by the double coordination free-interface modal synthesis method. The finite element model of the blade is constructed using ANSYS, and multiple contact pairs are established on the contact surface of the tenon. The results show that the double coordination free-interface modal synthesis method can effectively reduce the degree of freedom of the blade model while retaining the local contact characteristics of the interface.

JOURNAL OF SOUND AND VIBRATION (2023)

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Article Engineering, Multidisciplinary

Modeling approach for flexible shaft-disk-drum rotor systems with elastic connections and supports

Shengnan Zhao et al.

Summary: A dynamic modeling method is proposed for shaft-disk-drum (SDM) rotor systems with elastic connections and supports, and the coupling vibrations of disk, drum and shaft are investigated. The motion equations for flexible SDM rotor systems are derived using Lagrange equation by expanding displacement fields with orthogonal polynomials obtained by Gram-Schmidt process. The proposed modeling approach is verified and can be applied to more complex configurations.

APPLIED MATHEMATICAL MODELLING (2022)

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Article Engineering, Mechanical

Modeling and topology optimization of cylindrical shells with partial CLD treatment

Runze Zhu et al.

Summary: This paper presents a unified modeling approach for cylindrical shells with partial constrained layer damping (CLD) treatment under general boundary conditions. The CLD layout is optimized using topology optimization to achieve the desired damping performance. The proposed model is validated by comparing results with literature and finite element simulations, and the vibration characteristics of cylindrical shells with partial CLD treatment are studied.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2022)

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Article Mechanics

Nonlinear dynamic analysis of three-dimensional bladed-disks with frictional contact interfaces based on cyclic reduction strategies

Samuel Quaegebeur et al.

Summary: This study investigates the use of friction nonlinearities to reduce vibratory energy and extend the lifespan of bladed disk systems, proposing a reduction strategy for handling complex nonlinear models. With the use of the Dynamic Lagrangian Frequency Time algorithm to capture nonlinear effects, the impact of underplatform dampers on bladed disk systems was explored.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2022)

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Article Engineering, Mechanical

Analysis of Nonlinear Modal Damping Due to Friction at Blade Roots in Mistuned Bladed Disks

Junjie Chen et al.

Summary: A method is proposed to analyze the modal damping in mistuned bladed-disk with root joints using large finite element models and detailed description of frictional interactions at contact interfaces. The method allows investigation of influence of mistuning on dissipated energy and modal damping factors for different blades on a bladed-disk. A reduction method is developed to obtain results with acceptable computational times and study the dependency of modal damping factor on various parameters.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2021)

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Article Engineering, Mechanical

On the non-uniqueness of friction forces and the systematic computation of dynamic response boundaries for turbine bladed disks with contacts

Erhan Ferhatoglu et al.

Summary: This study systematically detected the variability observed in the periodic vibration analysis of turbine bladed disks with friction damping using an optimization algorithm. The method involved minimizing the system loss factor to determine the damping ability, while simultaneously imposing dynamic balance equations as nonlinear constraints. Results showed successful capture of the limits of the variability range, contributing to a deeper understanding of the dynamic response of turbine bladed disks.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Acoustics

Modeling and nonlinear dynamics analysis of a rotating beam with dry friction support boundary conditions

Chaofeng Li et al.

Summary: A nonlinear dynamic model of a rotating beam with dry friction support boundary conditions is developed and validated by comparing it with existing literature. The study focuses on the impact of higher-order harmonic components on the nonlinear dynamic response of the beam, as well as the effects of friction coefficient, excitation amplitude, and rotational speed on the system's amplitude-frequency response. The results demonstrate the importance of considering slip zones, contact stiffness, and contact damping in interpreting the variation of amplitude-frequency curves.

JOURNAL OF SOUND AND VIBRATION (2021)

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Article Acoustics

A study on the vibration dissipation mechanism of the rotating blade with dovetail joint

Chaofeng Li et al.

Summary: This study reveals the vibration dissipation mechanism of rotating blades with dovetail joints using dry friction damping. By adjusting system parameters, the vibration damping characteristics of the blade can be significantly altered.

JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL (2021)

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Article Acoustics

Nonlinear Vibration Analysis of a Rotating Disk-Beam System Subjected to Dry Friction

Houxin She et al.

SHOCK AND VIBRATION (2020)

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Article Engineering, Mechanical

Influence of fretting wear on bladed disks dynamic analysis

E. Lemoine et al.

TRIBOLOGY INTERNATIONAL (2020)

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Article Engineering, Mechanical

Influence of Geometric Design Parameters Onto Vibratory Response and High-Cycle Fatigue Safety for Turbine Blades With Friction Damper

Matthias Huels et al.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2019)

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Article Engineering, Mechanical

A study of friction microslip modeling for dynamic analysis of bladed discs with root joints

Junjie Chen et al.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE (2019)

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Article Engineering, Mechanical

Sensitivity and Forced Response Analysis of Anisotropy-Mistuned Bladed Disks With Nonlinear Contact Interfaces

Adam Koscso et al.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2019)

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Article Acoustics

Vibration analysis of mistuned damped blades with nonlinear friction and contact

Wei Zhao et al.

JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL (2019)

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Review Engineering, Mechanical

Dynamic modeling of gearbox faults: A review

Xihui Liang et al.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2018)

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Article Acoustics

Study on the Nonlinear Characteristics of a Rotating Flexible Blade with Dovetail Interface Feature

Chaofeng Li et al.

SHOCK AND VIBRATION (2018)

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Review Computer Science, Interdisciplinary Applications

Vibration Prediction of Bladed Disks Coupled by Friction Joints

Malte Krack et al.

ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING (2017)

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Article Acoustics

Vibration response analysis of blade-disk dovetail structure under blade tip rubbing condition

Hui Ma et al.

JOURNAL OF VIBRATION AND CONTROL (2017)

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Proceedings Paper Automation & Control Systems

Vibration response Analysis of Last stage LP turbine blades for variable size of crack in root

Akash Shukla et al.

3RD INTERNATIONAL CONFERENCE ON INNOVATIONS IN AUTOMATION AND MECHATRONICS ENGINEERING 2016, ICIAME 2016 (2016)

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Proceedings Paper Materials Science, Multidisciplinary

An experimental and FEM modal analysis of cracked and normal Steam Turbine Blade

Akash Shukla et al.

MATERIALS TODAY-PROCEEDINGS (2015)

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Proceedings Paper Engineering, Civil

Modal Analysis for Crack Detection in Small Wind Turbine Blades

Martin Dalgaard Ulriksen et al.

DAMAGE ASSESSMENT OF STRUCTURES X, PTS 1 AND 2 (2013)

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Article Engineering, Mechanical

Numerical assessment of friction damping at turbine blade root joints by simultaneous calculation of the static and dynamic contact loads

Stefano Zucca et al.

NONLINEAR DYNAMICS (2012)

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Article Engineering, Mechanical

Fretting wear characterization by point contact of nickel superalloy interfaces

M. Lavella et al.

WEAR (2011)

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Article Engineering, Mechanical

Method for Sensitivity Analysis of Resonance Forced Response of Bladed Disks With Nonlinear Contact Interfaces

E. P. Petrov

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2009)

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Article Engineering, Mechanical

Failure analysis of steam turbine last stage blade tenon and shroud

J. Kubiak Sz. et al.

ENGINEERING FAILURE ANALYSIS (2007)

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Article Engineering, Mechanical

Investigation of the failure of the L-0 blades

Z. Mazur et al.

ENGINEERING FAILURE ANALYSIS (2006)

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Article Engineering, Mechanical

Effects of damping and varying. contact area at blade-disk joints in forced response analysis of bladed disk assemblies

E. P. Petrov et al.

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME (2006)

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Article Mathematics, Applied

Finite element analysis of fir-tree region in turbine discs

SA Meguid et al.

FINITE ELEMENTS IN ANALYSIS AND DESIGN (2000)

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Influence of Fir-Tree Tenon Blade Parameters on Blade Dynamic Characteristics

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