Damping mistuning effect of the hard-coating-based intentional mistuning techniques on mistuned blisks and its mechanism

Gao, Junnan; Gao, Yining; Yan, Xianfei; Jiang, Jixiang; Xu, Kui; Sun, Wei

doi:10.1016/j.ast.2020.105848

Cited by 23 publications

(7 citation statements)

References 25 publications

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“…An improved component mode mistuning model is proposed by Xu et al [19] to identify the damping properties of the hard and viscoelastic coated blisks. Gao et al [20] also conducts numerical studies on blisks with tuned and mistuning coatings to evaluate the influence of intentional mistuning hard coatings on vibration characteristics of the structure. Wang and his coauthors [21,22] investigated the frequency responses, natural frequencies, mode shapes, and damping loss factors of a corrugated sandwich panel with polyurea coating, in which a mixed experimental and numerical approach was employed to quantify the benefit of coating material in the face sheets on the passive vibration attenuation of such a coated structure.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Studies on Vibration Resistance of Composite Plates with Damping Coating

Deng

Jin

Yang

et al. 2022

J. Mod. Mech. Eng. Technol.

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This study performs both theoretical and experimental studies on the vibration resistance of composite plates with damping coating subjected to impulse excitation load. A dynamic model is first proposed and the key differential equations are derived to solve the natural frequencies, time-domain vibration response, and dynamic stiffness at any vibration response point regarding the excitation point of such a coated structure. Then, a dynamic experiment system of two plate specimens with and without DC knocked by a hammer excitation is set up. The measured data indicates that the proposed dynamic model is trustworthy for predicting natural frequencies and dynamic stiffness results. Furthermore, based on the calculated dynamic stiffness data associated with the first four modes, the anti-vibration contribution of DC is quantitatively evaluated. It can be found that the coating can indeed improve the vibration resistance of the structure by up to 74.7%. In addition, the vibration suppression effect of DC is found to be closely related to the mode order of such a structure as well as the selected boundary condition.

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Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Studies on Vibration Resistance of Composite Plates with Damping Coating

Deng

Jin

Yang

et al. 2022

J. Mod. Mech. Eng. Technol.

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“…The results show that intentional mistuning has a great effect on the vibration localization. Intentional mistuning of the bladed disk is used to reduce the larger forced response (Corral et al, 2018;Martel and Sanchez-Alvarez, 2018;Gao et al, 2020;Joachim et al, 2021;Repetckii, 2020). An intentional mistuning bladed disk changes the vibration localization by designing the structure parameter (Nakos et al, 2021;Picou et al, 2018;Beirow et al, 2021;Biagiotti et al, 2018;Schlesier et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

A novel mathematical model for the design of the resonance mechanism of an intentional mistuning bladed disk system

Kan

Xing

2022

Mech. Sci.

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Abstract. Bladed disk systems with advanced functions are widely used in turbo-machineries. However, there are always deviations in physical dynamic properties between blades and blades due to the tolerance and wear in operation. The deviations will lead to vibration localization, which will result in high cycle fatigue and accelerate the damage of the bladed disk system. Therefore, many intentional mistuning patterns are proposed to overcome this larger local vibration. Previous studies show that intentional mistuning patterns can be used to reduce the vibration localization of the bladed disk. However, the determination of the resonance mechanism of the intentional mistuning bladed disk system is still an unsolved issue. In this paper, a novel mathematical model of resonance of an intentional mistuning bladed disk system is established. Mistuning of blades and energy resonance are included in this theoretical model. The method of the mechanical power of the rotating blade for one cycle is applied to obtain the resonance condition. By using this theoretical model, the resonance mechanism of an intentional mistuning bladed disk is demonstrated. The results suggest that the ideal results can be obtained by adjusting the intentional mistuning parameter. This paper will guide the design of the dynamic characteristics of the intentional mistuning bladed disk.

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“…The hard coating was found to effectively consume external energy due to the friction effect of the particles inside the coating, reducing the structural vibration after coating and offering a good suppression effect for the fatigue caused by vibration [16][17][18]. The use of hard coatings for vibration damping has become a new research direction [19][20][21][22][23][24], and therefore research has been conducted on the damping of aero-engine hydraulic clamppiping systems based on hard coatings. Aerohydraulic clamp-piping systems are generally affected by the vibration of the dual-rotor system of aero-engines and the vibration of the casing, resulting in local vibration and random vibration.…”

Section: Introductionmentioning

confidence: 99%

Research on the Vibration Characteristics of Aviation Hydraulic Clamp and Pipeline Based on Hard Coating

Cui

Liu

et al. 2022

Coatings

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Aviation hydraulic clamp-piping systems often experience damage due to vibration, which poses a great threat to the reliability and safety of the aircraft. In this paper, a hard coating is used as a new damping method to study the vibration characteristics of aviation hydraulic clamp-piping systems. Three kinds of coated clamp entities are obtained by optimization and preparation, and the combination of finite element simulation and experiment is used to analyze the vibration response of the high- and low-pressure rotor under fixed-frequency simple harmonic excitation, and the resonance response under sweep-frequency excitation of the aviation hydraulic clamp-piping system. Through orthogonal experiments, it is clear that 304 stainless steel clamps coated with 200-μm-thick YSZ-PTFE coating have the best vibration damping effect on the clamp-piping system; that is, the damping rate can reach 24.67% under fixed-frequency excitation, and swept frequency damping can reach 19.93%. The maximum error between the simulation and the experimental vibration response amplitude is 7.9%, which proves the correctness of the model and verifies that the YSZ-PTFE hard coating can significantly improve the vibration damping effect with very good application prospects.

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Damping mistuning effect of the hard-coating-based intentional mistuning techniques on mistuned blisks and its mechanism

Cited by 23 publications

References 25 publications

Theoretical and Experimental Studies on Vibration Resistance of Composite Plates with Damping Coating

Theoretical and Experimental Studies on Vibration Resistance of Composite Plates with Damping Coating

A novel mathematical model for the design of the resonance mechanism of an intentional mistuning bladed disk system

Research on the Vibration Characteristics of Aviation Hydraulic Clamp and Pipeline Based on Hard Coating

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