Passive vibration control in rotor dynamics: Optimization of composed support using viscoelastic materials

Ribeiro, Eduardo A. R.; Pereira, Jucélio Tomás; Bavastri, Carlos Alberto

doi:10.1016/j.jsv.2015.04.007

Cited by 55 publications

(32 citation statements)

References 17 publications

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“…(2) regardless of the torsional vibration of the shaft, the angular velocity of the shaft is constant; (3) the axial length of the disc is neglected, and the imbalance of the disc is located on one side plane; and (4) the stiffness and damping of the integral squeeze film damper are isotropic [23][24][25][26].…”

Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

“…A simplified model of the unbalanced single-side cantilevered rotor system is shown in Figure 4. The following assumptions were made during the analysis: (1) there is an elastic massless shaft; (2) regardless of the torsional vibration of the shaft, the angular velocity of the shaft is constant; (3) the axial length of the disc is neglected, and the imbalance of the disc is located on one side plane; and (4) the stiffness and damping of the integral squeeze film damper are isotropic [23][24][25][26]. It is assumed that the lateral displacement the rotation angle of the geometric center of the cantilevered disk in the x, y directions are x D , T D , y D , and U D , respectively.…”

Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

See 1 more Smart Citation

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Zhang

Yang

et al. 2019

Applied Sciences

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Featured Application: The proposed integral squeeze film bearing damper can effectively decrease the vibration of an unbalanced single-side cantilevered rotor system such as a flue gas turbine and pump. Abstract: In this paper, vibration control of an unbalanced single-side cantilevered rotor system using a novel integral squeeze film bearing damper in terms of stability, energy distribution, and vibration control is analyzed. A finite element model of such a system with an integral squeeze film bearing damper (ISFBD) is developed. The stability, energy distribution, and vibration control of the unbalanced single-side cantilevered rotor system are calculated and analyzed based on the finite element model. The stiffness of the integral squeeze film bearing damper is designed using theoretical calculation and finite element model (FEM) simulation. The influence of installation position and quantity of integral squeeze film bearing dampers on the vibration control of the unbalanced cantilevered rotor system is discussed. An experimental platform is developed to validate the vibration control effect. The results show that the installation position and quantity of the integral squeeze film bearing dampers have different effects on the stability, energy distribution, and vibration control of the unbalanced cantilevered rotor system. When ISFBDs are installed at both bearing housings, the vibration control is best, and the vibration components of the time and frequency domains have good vibration control effects in four working conditions. External excitations are mainly caused by the impact load and pulsation excitation of the fluid. When the excitation frequencies are close to the natural frequencies of the system, the resonance occurs in the system, causing unpredictable losses.With the rapid development of the single-side cantilevered rotor system, the vibration problems have become increasingly prominent. These problems pose a huge threat to safety production and economic benefits. In actual civil and military equipment, rotor systems often vibrate due to unbalance, resulting in impeller fracture, seal failure, bearing damage, valve failure, pipeline leakage, and loose foundation [6]. These faults cause equipment damage or even major safety accidents, along with unpredictable personal injury to users. So, it is necessary to control the vibration of the unbalanced single-side cantilevered rotor.The vibration mechanism of the unbalanced single-side cantilevered rotor system has already been researched by many scholars. According to the obtained theory, the vibration control of the system is divided into four types: structural modification, vibration absorption, vibration isolation, and vibration damping. At the same time, the vibration control method is divided into two types: active and passive control. Active control refers to the use of the sensor to collect signals and feedback for the controller to drive the damper to reduce vibration. Passive control refers to vibration control that can be performed without add...

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Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Zhang

Yang

et al. 2019

Applied Sciences

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“…Another passive vibration control approach in rotor dynamics uses viscoelastic materials. 22 In previous studies, [23][24][25] concepts were presented in which the stator rings of permanent magnetic bearings are directly mounted on viscoelastic elements. The authors of earlier works [26][27][28] introduced whole systems with permanent magnetic radial and tilt stabilization and viscoelastic damping elements.…”

Section: Dampingmentioning

confidence: 99%

Fundamental considerations on introducing damping to passively magnetically stabilized rotor systems

Marth

Jungmayr

Amrhein

2016

Advances in Mechanical Engineering

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When designing passively magnetically stabilized rotor systems, introducing sufficient damping is key. We investigated two different dynamic systems-with one mass and two masses-to determine their theoretical optimal behavior and how they can be realized considering real-world specifications and limitations. Based on dimensionless formulations of reduced dynamic systems, we present fundamental correlations between, and the optimal choice of, physical parameters. Furthermore, we compare the two systems in terms of feasibility and efficiency of different damping methods. Our investigations used an eddy current damper and viscoelastic damping elements as exemplary damping methods for the one-mass and two-mass systems, respectively. Passive stabilization was realized by means of permanent magnetic bearings. We found that the two-mass system is preferable due to the broader range of damping possibilities.

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“…Here they obtain the controllability of the bearing by utilizing the magneto rheological fluid as lubricant along with the external magnetic field. Some earlier works [9][10][11] explained the vibration control studies on the rotor dynamics by using of different methods like active and passive vibration controls. Some more works [12,13] explained the application of the electrorheological fluids in machine tool elements and the automobile engine mount applications.…”

Section: Introductionmentioning

confidence: 99%

Semi-active vibration control of high-speed rotor system with electrorheological bearing fluid

Mutra

Srinivas

2018

MATEC Web Conf.

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Present work focuses on the use of electrorheological fluid (ERF) as a lubricant in the high speed turbocharger rotor supported on floating ring bearings. The rotor is analysed by finite element modelling with gyroscopic effects and bearing forces. The ERF contains one carrier fluid and active particles that react to external electric field, which induces a yield stress in the fluid increasing its viscosity. In order to control the rotor vibration amplitudes, the dynamic changes in the fluid viscosities at the inner and outer films of bearing are employed with external electric field. A case study of automotive turbocharger rotor is considered and the effect of semi-active control is illustrated on the dynamic response of the system.

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Passive vibration control in rotor dynamics: Optimization of composed support using viscoelastic materials

Cited by 55 publications

References 17 publications

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Fundamental considerations on introducing damping to passively magnetically stabilized rotor systems

Semi-active vibration control of high-speed rotor system with electrorheological bearing fluid

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