Experimental Investigation on the Damping Effectiveness of Blade Root Joints

Firrone, Christian Maria; Bertino, Ilaria

doi:10.1007/s11340-015-0001-9

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…Then, the changes in frequency and loss factors of the nonlinear system with traction load and vibration amplitude were determined by analyzing the obtained signals. Firrone [10] used the same test equipment to measure the forced response in the frequency domain and verify the numerical results based on the harmonic balance method. Asai [11] analyzed the behavior of cantilever beam root nodes with different geometries and evaluated the corresponding friction damping in the system.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Nonlinear Vibration in Compressor Stator Blade with Holding Ring Structure Considering Contact Friction

Liu

Xie

et al. 2023

Applied Sciences

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At present, there are very few vibration test designs for compressor stator blades in damped blade test research, and there is a lack of consideration of the holding ring structure of the blade installation. In recent years, compressor designs have become more elaborate, and their structures have become more compact. For improving compressor stator blade design, it is necessary to study the blade vibration response considering contact and friction. In this paper, a compressor stator blade vibration test system with a holding ring structure is designed and built. The composition of the system and the flow of vibration are tested. Then, the nonlinear vibration rules of the model stator blades are experimentally studied through the built test bench. The experimental conditions include excitation forces of 1 N, 2 N, 3 N and 4 N, respectively. At the same time, the normal load of the outer holding ring and the blade contact surface includes 10 N, 20 N, 30 N and 40 N working conditions. The nonlinear vibration law of the test model blade considering contact friction is analyzed using a numerical method and experimental data. The experimental data agree well with the numerical analysis results, and the relative error of measurement is basically less than 5%. It is concluded that the damping vibration rule of the test model blade is related to the exciting force applied by the exciter and the contact surface normal load applied by the adjusting bolt. When these two parameters change, the movement behavior of the contact surface will switch between macro-slip, fretting slip and even a viscous state. Therefore, the amplitude of the blade will change and show nonlinear vibration characteristics. The experimental data in this paper can provide a reference for research on stator ring vibration safety in compressors.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Nonlinear Vibration in Compressor Stator Blade with Holding Ring Structure Considering Contact Friction

Liu

Xie

et al. 2023

Applied Sciences

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“…The former two conditions are often challenging to ensure, so it is essential that the composite component is adequately damped. Damping in a traditional fan blade system is provided by frictional damping from the blade-root interface [4], material damping and aeroelastic interaction. From the perspective of a composite component, the material damping (i.e.…”

Section: Introductionmentioning

confidence: 99%

Simplified low order composite laminate damping predictions via multi-layer homogenisation

Mace¹,

Taylor²,

Schwingshackl³

2022

Composites Part B: Engineering

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“…There were several test rigs built for the studies of the root damping in dovetail and fir-tree joints, and there are some results of experimental measurements of the damping factor for different amplitudes, centrifugal forces and mode shapes. 12,13 . The relationships between tangential and normal loads for the friction contact elements are established in Zucca et al 14 and suggested for the root damping analysis.…”

Section: Introductionmentioning

confidence: 99%

High-fidelity calculation of modal damping caused by friction at blade roots for single blades and tuned bladed disc assemblies

Chen

Zang

Zhou

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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A method for the analysis of amplitude-dependent modal damping factors is developed for the cases when the energy dissipation is caused by the micro-slip motion at friction contacts of blade root joints. The modal damping at root joints for a lone blade and for tuned bladed disc assemblies is studied. Large three-dimensional finite element models and detailed description of friction contacts by surface-to-surface friction contact elements at contact interfaces of the root joints are used for the calculations. The method allows using available finite element packages and is based on the direct calculation of the energy dissipated at root joints for prescribed levels of vibration amplitudes. The method takes into account the nonlinear dependency of the modal damping factors on the vibration level. The numerical studies of the dependency of modal damping factors on the vibration amplitudes, rotation speed, and contact interface parameters are performed for different families of modes and different nodal diameter numbers.

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Experimental Investigation on the Damping Effectiveness of Blade Root Joints

Cited by 13 publications

References 11 publications

Experimental and Numerical Study of Nonlinear Vibration in Compressor Stator Blade with Holding Ring Structure Considering Contact Friction

Experimental and Numerical Study of Nonlinear Vibration in Compressor Stator Blade with Holding Ring Structure Considering Contact Friction

Simplified low order composite laminate damping predictions via multi-layer homogenisation

High-fidelity calculation of modal damping caused by friction at blade roots for single blades and tuned bladed disc assemblies

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