Vibration Reduction of Turbomachinery Bladed Disks with Changing Dynamics using Piezoelectric Materials

A comparison between the friction and piezoelectric synchronized switch dampers for blisks

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x18778360 ◽

2018 ◽

Vol 29 (12) ◽

pp. 2693-2705 ◽

Cited By ~ 3

Author(s):

Jiuzhou Liu ◽

Lin Li ◽

Yu Fan

Keyword(s):

Piezoelectric Materials ◽

Vibration Reduction ◽

Harmonic Balance Method ◽

Single Mode ◽

Excitation Level ◽

State Response ◽

Lumped Parameter ◽

Engine Order ◽

Lumped Parameter Models ◽

Promising Solution

In this work, we explore the feasibility of applying the synchronized switch damping on negative capacitor damper to integrally bladed disks (blisks) by comparing its damping performance with that of the friction ring with the same added mass. Both dampers are coupled to the disk of the blisk. Namely, the friction ring is in contact with the underside of the wheel and the piezoelectric materials for synchronized switch damping on negative capacitor are bonded on the disk as well. The lumped parameter models are used for the blisk and dampers, and the multi-harmonic balance method is employed to obtain the steady-state response under engine-order excitations. The vibration-reduction performance of the dampers are compared with respect to the excitation level, the engine order, and multi-mode. This leads to a discussion concerning the parameter design for the synchronized switch damping on negative capacitor damper to achieve a comparable single-mode damping as the friction ring. We show that the synchronized switch damping on negative capacitor damper has a better performance for multiple modes and at a wider range of excitation level. These results indicate that the synchronized switch damping on negative capacitor damping can be a promising solution for the vibration reduction of blisks where the spatial and spectral distributions of the excitation are rich.

Download Full-text

Topological Optimization of Piezoelectric Transducers for Vibration Reduction of Bladed Disks

10.1115/gt2021-59461 ◽

2021 ◽

Author(s):

Y. Fan ◽

H. Y. Ma ◽

Y. G. Wu ◽

L. Li ◽

K. Y. Tian ◽

...

Keyword(s):

Electromechanical Coupling ◽

Piezoelectric Materials ◽

Damping Ratio ◽

Added Mass ◽

Topological Optimization ◽

Fe Model ◽

Bladed Disks ◽

Multiple Modes ◽

Bladed Disk ◽

Modal Damping

Abstract In this work, we develop a numerical method to determine the best distribution of piezoelectric materials on a given bladed disk, so as to minimize the added mass of shunted piezoelectric dampers. There is no constrain on the shape of piezoelectric materials, and only the overall mass is limited. The method can be applied to a single mode or several modes from the same or different modal groups. The method is based on the fact that the modal damping is solely determined by the modal electromechanical coupling factor (MEMCF) which is related to the modal stress field and the geometric of the piezoelectric materials only. A linear weighting of stress components is proposed as the criterion to determine the priority of locations for piezoelectric materials. The piezoelectric materials are introduced to the FE model by modifying the type and materials parameters of elements if they are embedded to the bladed disks; or by creating an additional layers of elements if they are bonded to the bladed disks. Details for considering multiple modes, handling polarization direction and electrode connection are also presented. The proposed procedure is applied to an empirical bladed disk with NASA-ROTOR37 profile. Results show that 12% damping ratio can be achieved for multiple modes simultaneously, if we locate piezoelectric materials on the blade with 10% added mass. When locate the piezoelectric materials on the disk and the added mass is only 5%, up to 13% modal damping ratio for the disk dominant modes can be achieved.

Download Full-text

A low-cost and efficient d33-mode piezoelectric tuned mass damper with simultaneously optimized electrical and mechanical tuning

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x20966056 ◽

2020 ◽

pp. 1045389X2096605

Author(s):

Yong-An Lai ◽

Jin-Yeon Kim ◽

Chuang-Sheng Walter Yang ◽

Lap-Loi Chung

Keyword(s):

Optimal Design ◽

Energy Harvesting ◽

Piezoelectric Materials ◽

Low Cost ◽

Vibration Reduction ◽

Tuned Mass Damper ◽

Spring Stiffness ◽

Mass Damper ◽

Piezoelectric Stacks ◽

Optimal Values

This paper proposes a low-cost and efficient piezoelectric tuned mass damper (Piezo-TMD) for structural vibration reduction and energy harvesting. The Piezo-TMD consists of not only a proof mass, piezoelectric materials deforming in the d33 mode, and an electrical resistance, but also a spring and an inductor which enable the mechanical frequency and electrical frequency of the Piezo-TMD to be tuned to the structural resonance frequency. The equations of motion of a structure with the Piezo-TMD are derived, and an optimal design procedure for the Piezo-TMD is proposed to achieve a simultaneous maximum vibration reduction and energy harvesting. The performance of the Piezo-TMD is compared with that of a conventional optimal TMD installed in a footbridge under a pedestrian loading. The simulation results show that the Piezo-TMD performs better than the optimal conventional TMD in terms of vibration reduction while efficiently converting the absorbed mechanical energy to electricity with a high energy harvesting ratio. The innovative development of simultaneously tuning the mechanical and electrical systems leads to a much lower number of PZT stacks (saving 88% of piezoelectric materials in an illustrated case). The parametric study shows that the Piezo-TMD achieves the best performance when the optimal values for the spring stiffness, resistance, inductance, and the number of piezoelectric stacks are adopted from the proposed optimal design. If the selected spring stiffness and inductance are uncertain in a range between 0.94-1.07 times the optimal values, the vibration reduction performance of the Piezo-TMD remains similar, and the energy harvesting performance reduces less than 5%, as compared to the optimal performance. The effect of the number of piezoelectric stacks was also investigated. An insufficient number of piezoelectric stacks reduces the Piezo-TMD performance, and an excessive stack number does not improve the Piezo-TMD performance but increases the Piezo-TMD cost. Finally, the proposed Piezo-TMD employs inductance to significantly reduce the PZT stack number, thereby significantly reducing the cost of Piezo-TMDs.

Download Full-text

Piezoelectric-Based Vibration Reduction of Turbomachinery Bladed Disks via Resonance Frequency Detuning

AIAA Journal ◽

10.2514/1.j051344 ◽

2012 ◽

Vol 50 (5) ◽

pp. 1137-1144 ◽

Cited By ~ 28

Author(s):

Jeffrey L. Kauffman ◽

George A. Lesieutre

Keyword(s):

Resonance Frequency ◽

Vibration Reduction ◽

Frequency Detuning ◽

Bladed Disks

Download Full-text

Vibration Reduction of Mistuned Bladed Disks by Passive Piezoelectric Shunt Damping Techniques

AIAA Journal ◽

10.2514/1.j052202 ◽

2014 ◽

Vol 52 (6) ◽

pp. 1194-1206 ◽

Cited By ~ 13

Author(s):

B. Zhou ◽

F. Thouverez ◽

D. Lenoir

Keyword(s):

Vibration Reduction ◽

Bladed Disks ◽

Shunt Damping ◽

Piezoelectric Shunt

Download Full-text

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

Applied Sciences ◽

10.3390/app10041478 ◽

2020 ◽

Vol 10 (4) ◽

pp. 1478 ◽

Cited By ~ 2

Author(s):

Fengling Zhang ◽

Lin Li ◽

Yu Fan ◽

Jiuzhou Liu

Keyword(s):

Piezoelectric Materials ◽

Relative Displacement ◽

Travelling Wave ◽

Forced Response ◽

Bladed Disks ◽

Single Beam ◽

Bladed Disk ◽

Double Beam ◽

Switching Action ◽

Aero Engines

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.

Download Full-text

Analysis of Sputtered Zinc Oxide Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600001781 ◽

1980 ◽

Vol 38 ◽

pp. 416-417

Author(s):

T. A. Emma ◽

M. P. Singh

Keyword(s):

Electron Microscopy ◽

Zinc Oxide ◽

Piezoelectric Materials ◽

Oxide Films ◽

Optical Quality ◽

Zno Films ◽

Rf Power ◽

X Ray Diffraction ◽

Sputtered Films ◽

Zinc Oxide Films

Optical quality zinc oxide films have been characterized using reflection electron diffraction (RED), replication electron microscopy (REM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Significant microstructural differences were observed between rf sputtered films and planar magnetron rf sputtered films. Piezoelectric materials have been attractive for applications to integrated optics since they provide an active medium for signal processing. Among the desirable physical characteristics of sputtered ZnO films used for this and related applications are a highly preferred crystallographic texture and relatively smooth surfaces. It has been found that these characteristics are very sensitive to the type and condition of the substrate and to the several sputtering parameters: target, rf power, gas composition and substrate temperature.

Download Full-text