Vibration characteristics analysis of mistuned bladed disk system based on mobile interface prestressed CMS super-element method

Zhang, Liang; He, Yuan; Yuan, Huiqun; Li, Xin

doi:10.21595/jve.2018.19458

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…In this method, stator blade displacement and dynamic displacement are combined to calculate the displacement of blade disk system. Zhang [20] studied the vibration characteristics of a blade disk model with friction damping structure. The results show that the macroscopic slip caused by partial dry friction of the blade root can reduce the vibration amplitude.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Vibration Response of Compressor Stator Blade Considering Contact Friction of Holding Ring

Liu

Zhang

et al. 2023

Applied Sciences

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There are many kinds of assembly structures in heavy-duty gas turbine compressor stator blades which have significant influence on the complex damping vibration characteristics. At present, compressor design is becoming more and more compact, so it is very meaningful to accurately obtain stator blade vibration characteristics of structures with contact damping. Firstly, a fretting slip friction dynamic model was introduced, and then a vibration analysis model of the compressor stator blade with outer ring structure was established based on the slip friction theory. Then, the vibration response of the compressor stator blade was obtained according to various working conditions, and the main factors affecting the vibration characteristics of the stator blade were revealed. Finally, the vibration response of the blade under a particular exciting force condition was simulated. The results show that the damping vibration characteristics of the compressor stator blades were affected by the excitation force and the normal load of the contact surface. The vibration response curve of the stator blade and the equivalent stiffness coefficient of the contact surface were analyzed, and the friction motion of the contact surface changed with the change of the working condition. The model can simulate the nonlinear vibration characteristics of stator blades. This method provides a reference for the vibration safety analysis of compressor stator blades.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Vibration Response of Compressor Stator Blade Considering Contact Friction of Holding Ring

Liu

Zhang

et al. 2023

Applied Sciences

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“…Literature [21][22][23][24][25] carried out related researches on the vibration characteristics of mistuned bladed disks on the basis of the fixed-interface CMS method. Literature [26] identified the mistuned parameters of real blades using modal testing and finite element method, and the vibration characteristics of the real mistuned bladed disk structure were analyzed by the mobile interface prestressed CMS superelement method.…”

Section: Introductionmentioning

confidence: 99%

Mobile Interface CMS Method for Vibration Characteristics Prediction of Mistuned Bladed Disk with Different Coupling Degrees

Zhang

Wang

2021

Mathematical Problems in Engineering

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The prediction of vibration characteristics was studied in the mistuned bladed disk by the mobile interface prestressed component mode synthesis (CMS) superelement method. When the strongly, generally, and weakly coupling in the mistuned bladed disk, according to the results of the direct FEM method, the prediction accuracy of this method was verified and compared with the fixed-interface CMS method by using the relative error of dynamic frequency, vibration mode matching function, and dimensionless root mean square error of vibration amplitudes. It is pointed that for mistuned bladed disk in the strong coupling, the prediction accuracy of dynamic frequency and vibration amplitudes are higher by the mobile interface CMS method and the vibration modes are matched with the direct method. In weak coupling, the results of dynamic frequency and vibration modes predicted by the mobile interface CMS method and the fixed-interface CMS method are consistent with the direct method, but the vibration amplitudes’ prediction error of the mobile interface CMS method is lower than that of the fixed-interface CMS method. In general coupling, the mobile interface CMS method has higher dynamic frequency prediction accuracy at low order, and the two methods have comparable dynamic frequency prediction accuracy at high order. The vibration modes predicted by the two methods are matched with the direct FEM method, and the prediction accuracy of vibration amplitude by the mobile interface CMS method is better than that of the fixed-interface CMS method. The results indicate that the mobile interface CMS method could more accurately predict vibration characteristics of the mistuned bladed disk with different coupling degrees and could be an effective measurement for studying the vibration characteristics of the mistuned bladed disk system.

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“…For instance, based on the component mode synthesis (CMS) ROM, Judge et al 32 proposed two methods to identify blade mistuning by measuring data of the vibration response of the blisk. Zhang et al 33 proposed a new mobile interface prestressed CMS super-element method, and the mistuning of real blades was identified by modal testing and finite element method. Using the Craig-Bampton (C-B) technique, Pichot et al 34 presented a mistuning identification method for turbomachinery blisks.…”

Section: Introductionmentioning

confidence: 99%

Mistuning identification for coated blisks using small amount of experimental data

Yan

Sun

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Because the coatings are likely to produce new mistuning which aggravates the vibration failure of coated blades, it is particularly important to study the mistuning identification for coated blades. In this study, the degrees of freedom of the whole disk of the coated blisk is completely constrained, and the orders of the dynamic model of the coated blisk based on component mode mistuning (CMM) method is further reduced. Based on this model, a novel mistuning identification method for the coated blade of the coated blisk by small amount of experimental data is proposed, which can identify the mass, stiffness and damping mistuning of the blade substrates and coatings. The input parameters with high amount of data, such as modal shape matrix, are removed from identification formulas, thus, both the amount of data for identification calculation and the workload of vibration testing are reduced. The mistuning identifications of the numerical case and actual case are carried out respectively, and the identification process of the mistuning identification method in this paper is compared with the one based on the classical CMM model. It is shown that the mistuning identification method is effective and feasible, and the identification efficiency is higher than the classical CMM identification method.

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Vibration characteristics analysis of mistuned bladed disk system based on mobile interface prestressed CMS super-element method

Cited by 5 publications

References 15 publications

Numerical Study on Vibration Response of Compressor Stator Blade Considering Contact Friction of Holding Ring

Numerical Study on Vibration Response of Compressor Stator Blade Considering Contact Friction of Holding Ring

Mobile Interface CMS Method for Vibration Characteristics Prediction of Mistuned Bladed Disk with Different Coupling Degrees

Mistuning identification for coated blisks using small amount of experimental data

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