Investigation of the performance of a rotor-bearing system containing composite and non-composite squeeze film dampers

Faris, Waleed Fekry; Khalid, Asad A.; Albagul, Abdulgani; Ismail, Godem A.

doi:10.1016/j.matdes.2011.07.053

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The modal damping ratio ξ e are 0.107 and 0.0628 at room and high temperature respectively. These are more than acceptable values for critical damping ratios in support dampers technology, again showing the interesting vibration absorption properties of the SMA-MR smart support [25,40].…”

Section: Discussionmentioning

confidence: 90%

Tuning the vibration of a rotor with shape memory alloy metal rubber supports

Zhang

et al. 2015

Journal of Sound and Vibration

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Section: Discussionmentioning

confidence: 90%

Tuning the vibration of a rotor with shape memory alloy metal rubber supports

Zhang

et al. 2015

Journal of Sound and Vibration

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“…This effect is usually achieved in three ways. One method is passive control, for example, using a squeeze film damper (SFD) (Chu and Holmes, 2000;Faris et al, 2012) or nonlinear energy sink (NES) (Bab et al, 2014;Guo et al, 2015;Taghipour et al, 2018;Tehrani and Dardel, 2018). Because the rub-impact of the rotor/stator may be caused by different faults, the optimal design parameters of a rotor system with a passive damper under certain rub-impact situations may not be optimal or even harmful in the case of other rub-impact situations.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of nonlinear rub-impact of a rotor system with magnetorheological damper

Wang

Zhang

et al. 2019

Journal of Intelligent Material Systems and Structures

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In this work, a new method of using a magnetorheological damper to improve the self-adaptive ability of a rotor system to rub-impact is developed. To validate the feasibility of this method, a finite element model of the rub-impact rotor system with magnetorheological damper is investigated. A revised formula describing the relationship between the yielding shear stress and magnetic field intensity is proposed. Focusing on the mitigation effect of magnetorheological damper on the nonlinear dynamic response of the rotor system, numerical simulation is conducted. The results show that magnetorheological damper has a considerable effect on the vibration and stability of a rub-impact rotor system. When a suitable current is applied, magnetorheological damper can effectively mitigate the vibration of the rotor system to prevent rub-impact. If contact of the rotor/stator is inevitable, magnetorheological damper can further stabilize heavy rub-impact to slight rub-impact by adjusting the current to an appropriate value. This research reveals the influence mechanisms of magnetorheological damper on normal and rub-impact rotor systems and is helpful for vibration control and fault self-healing of rotating machinery.

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“…Simulation results showed that two-lobe wave geometry influences the lubricating behaviors of the system and improves some unstable branches and the whirling phenomenon. Faris et al 4 showed their observation of a rotorbearing system containing composite and non-composite squeeze film dampers. They found that the performance of squeeze film damper improved with increasing oil pressure and length/diameter ratio within the range tested.…”

Section: Introductionmentioning

confidence: 99%

“…Faris et al. 4 showed their observation of a rotor-bearing system containing composite and non-composite squeeze film dampers. They found that the performance of squeeze film damper improved with increasing oil pressure and length/diameter ratio within the range tested.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of gear-rotor-bearing system equipped with HSFD under hydraulic actuator active control

Jian

Chu

Chang

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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In this study, the nonlinear dynamic analysis of the hybrid squeeze film damper mounted on a gear-rotor-bearing system is presented. The strong nonlinear oil film force, nonlinear rub-impact force between the rotor and stator, and the gear meshing force are considered in this study. The bifurcation diagrams are plotted using a dimensionless imbalance factor, damping coefficient, and speed ratio as control parameters in this study. The beginning of chaotic motion is identified by phase diagrams, power spectrum, Poincaré maps, bifurcation diagrams, maximum Lyapunov exponent, and the fractal dimension of the system. The numerical results provide useful insights into the design and development of a gear-rotorbearing system for rotating machinery that operates at high speeds and highly nonlinear conditions. Hybrid squeeze film damper is used to suppress irregular dynamic behaviors and reduce greater amplitude, even if the rotational speed of the rotating machine is higher, which is also confirmed in this study. IntroductionGears play an important role in the transmission system, especially for rotor bearing systems and turbomachinery, therefore, the consideration of gears transmission in rotor-bearing systems is needed. The rub-impact effect is a common and important phenomenon that occurs between the rotor and the stator. These effects may cause the rotating system to become instable. The dynamic analysis of the gear-rotor-bearing system with rub-impact effect is therefore important for analyzing rotating machinery. In order to control the dynamic stability of the gearrotor-bearing system with the shock effect, we take the hybrid squeeze film damper (HSFD) to control this kind of system. The HSFD is actually a useful tool, and has been well developed and used in many fields. A squeeze-film damper bearing is actually a special type of journal bearing with its journal mechanically prevented from rotating, but it is free to vibrate within the clearance space. The squeezing action produces hydrodynamic forces in the fluid film. A squeeze-film damper bearing can be designed such that the journal can statically find its own position within the clearance, or be held centrally within the clearance, by retaining the springs. If the retaining springs are

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Investigation of the performance of a rotor-bearing system containing composite and non-composite squeeze film dampers

Cited by 6 publications

References 12 publications

Tuning the vibration of a rotor with shape memory alloy metal rubber supports

Tuning the vibration of a rotor with shape memory alloy metal rubber supports

Mitigation of nonlinear rub-impact of a rotor system with magnetorheological damper

Nonlinear dynamic analysis of gear-rotor-bearing system equipped with HSFD under hydraulic actuator active control

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