Dynamic characteristics of the blisk with synchronized switch damping based on negative capacitor

Liu, J.; Li, L.; Huang, Xiaoli; Jézéquel, L.

doi:10.1016/j.ymssp.2017.03.049

Cited by 36 publications

(42 citation statements)

References 30 publications

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“…The response amplitudes of 24 blades in three cases (tuned, mistuned with and without dual-connected SSDI) are compared in Figure 19. To solve the nonlinear equations, multi-harmonic balance method is employed with a few additional techniques to improve the convergence [28,31].…”

Section: Forced Response Resultsmentioning

confidence: 99%

“…To solve this nonlinear structural dynamic problem, we employ the multi-harmonic balance method with a few numerical treatments to enhance the convergence. We have developed an in-house code which passes several test cases and has already been applied to analyze local SSDI [28], SSDNC [29] and dry friction dampers [37]. This method is much faster than the numerical integral method such as the Runge-Kutta method or the Newmark method to calculate the steady-state response.…”

Section: Dual-connected Ssdimentioning

confidence: 99%

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Dual-Connected Synchronized Switch Damping for Vibration Control of Bladed Disks in Aero-Engines

Zhang

Fan

et al. 2020

Applied Sciences

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An enhanced SSDI (synchronized switch damping on inductor) approach is proposed to suppress the vibration of bladed disks in aero-engines. Different from the authors’ former work (MSSP, 2017; JIMSS, 2018) where a local SSDI circuit is shunted to the piezoelectric materials at each blade sector, in this work two blade sectors are interconnected by a shared SSDI circuit. In this way, the switching action of SSDI is triggered by the relative displacement between two blade sectors. The feasibility of the dual-connected SSDI is numerically examined by a 2-DOF (degree-of-freedom) mechanical system, and further experimentally validated on a single-beam and a double-beam system. Results show that the damping performance increases with the amplitude of relative displacement. This feature is especially favorable for the application of blisks where the blade normally vibrates in different amplitudes and phases. Eventually, we conduct numerical simulation on the forced response of mistuned bladed disk undergoing travelling wave excitation. Results show that the dual-connected configuration can reduce at least half the number of switching shunts while maintain nearly the same performance as the conventional (local) SSDI.

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Section: Forced Response Resultsmentioning

confidence: 99%

Section: Dual-connected Ssdimentioning

confidence: 99%

Dual-Connected Synchronized Switch Damping for Vibration Control of Bladed Disks in Aero-Engines

Zhang

Fan

et al. 2020

Applied Sciences

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“…Using this procedure, the nonlinear modal shape Y, damped natural frequency, which is the imaginary part of λ, and modal damping ratio, which is the real part of λ, can be obtained by solving these equations. More details on the solving procedure can be found in literature [34,37].…”

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 99%

“…Considering the complexity and cost of experimental research on the blisk in aeroengines, it is meaningful and necessary to find an efficient method to predict the dynamic behaviours of the blisk with SSD. For these reasons, we investigated the dynamic characteristics of the blisk with the SSDNC using the multiharmonic balance method combined with the procedure of alternating frequency/time domain (MHBM-AFT) [34]. With this method, we performed complex modal analysis and calculated the forced response of the nonlinear electromechanical system.…”

Section: Introductionmentioning

confidence: 99%

A Modified Nonlinear Modal Synthesis Scheme for Mistuned Blisks with Synchronized Switch Damping

Liu

Fan

et al. 2018

International Journal of Aerospace Engineering

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In the authors' previous work (MSSP 2017), we show that the synchronized switch damping based on negative capacitor (SSDNC) is a good candidate for vibration suppression of tuned blisks. In this paper, we consider the mistuned case and propose an efficient numerical approach to accelerate the required statistical analysis. Although SSDNC is a type of nonlinear piezoelectric damping, through an in-depth nonlinear modal analysis, we show that the modal information of the system remains unchanged with respect to the nonlinear modal amplitude. Based on this, an accelerated nonlinear component modal synthesis (NCMS) method is proposed to predict and further analyse the dynamic characteristics of the nonlinear system. The precision and efficiency of the proposed method is compared with that of the multiharmonic balance method. The stochastic characteristics of the blisk are studied with two sources of mistuning. The first one is random stiffness mistuning and the second one is capacitance mistuning. The investigation is carried out with different mistuning levels and under different engine-order excitations. The results show that the NCMS method can accurately predict the forced response of the mistuned blisk with SSDNC, and the calculation cost can be considerably reduced. Two advantages of the SSDNC technique applied to the mistuned blisk have been revealed in the statistical view. The first one is that the SSDNC can suppress the amplified vibration induced by the mistuning of the blisk significantly. The second one is that the vibration-suppression performance of SSDNC is insensitive to the mistuning of the blisk and that of the electrical circuits.

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“…Till now, many researches have been done about coating such as the identification of mechanical parameters, 22 the evaluation of damping characteristics, 23 vibration analysis of viscoelastic damping structure, 24 etc. With regard to the coated blisk structure, Liu et al 25 studied the dynamic characteristics of coated blisk with synchronized switch damping. Xu et al 26 proposed a novel mistuning identification method of coated blisk based on CMM.…”

Section: Introductionmentioning

confidence: 99%

Nodal diameter vibration identification of coated blisk under traveling wave excitation

Jin

Sun

2020

Journal of Low Frequency Noise, Vibration and Active Control

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It is seen that blisk will be in a nodal diameter vibration state under the engine order excitation, which can be simulated by traveling wave excitation. The nodal diameters rotate on the blisk and it is necessary to identify the specific form of the nodal diameter vibration. Here, based on the determination of nodal diameter vibration parameters, a novel identification method of the nodal diameter vibration was proposed through the experimental test. Specifically, a traveling wave excitation system was built using the LabVIEW control software and noncontact magnetic exciters. Based on the description of resonant state of blisk, the identification principle formulas of the nodal diameter vibration were derived and the identification procedure was given. Taking uncoated and coated blisks as the research objects, the identification method was demonstrated. The identification results showed that the shape, direction, speed, and period of nodal diameter vibration were successfully obtained by the proposed method. In addition, it was found that coatings have a damping effect on blisk. Because of the coating introduction, the blisk vibration response was reduced, the rotation speed of nodal diameter was slowed down, and the rotation period of nodal diameter was increased.

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Dynamic characteristics of the blisk with synchronized switch damping based on negative capacitor

Cited by 36 publications

References 30 publications

Dual-Connected Synchronized Switch Damping for Vibration Control of Bladed Disks in Aero-Engines

Dual-Connected Synchronized Switch Damping for Vibration Control of Bladed Disks in Aero-Engines

A Modified Nonlinear Modal Synthesis Scheme for Mistuned Blisks with Synchronized Switch Damping

Nodal diameter vibration identification of coated blisk under traveling wave excitation

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