Dynamic Modeling of a Dual Clearance Squeeze Film Damper. Part II

Moraru, Laurentiu; Keith, Theo G.; Dimofte, Florin; Cioc, Sorin; Fleming, D. P.

doi:10.1080/10402000600927688

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…Fleming [8] proposed a dual clearance SFD which can better sustain high unbalance loadings. Moraru and Fleming [9,10] developed a rotor dynamic model with the dual clearance SFD and studied the behavior of the damper with numerical method. Then a test rig that was designed and built by NASA Glenn Research Center (NASA-GRC) was employed to validate the theoretical results, and the results favorably agreed with the measured data.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the nonlinear dynamic response of a rotor supported on ball bearings with floating-ring squeeze film dampers

Zhou

Luo

Guo

et al. 2013

Mechanism and Machine Theory

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Section: Introductionmentioning

confidence: 99%

Analysis of the nonlinear dynamic response of a rotor supported on ball bearings with floating-ring squeeze film dampers

Zhou

Luo

Guo

et al. 2013

Mechanism and Machine Theory

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“…e simulation model was verified by the experimental result [5][6][7]. Ertas B. H. and Camatti M. managed a test about the unbalance response of a rotor supported on a damped gas bearing.…”

Section: Introductionmentioning

confidence: 81%

Study on the Vibration Mitigation Characteristic of Dual Clearance Squeeze Film Damper

Feng

Luo

Yang

et al. 2021

Shock and Vibration

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In this paper, a novel model of dual clearance squeeze film damper (DCSFD) was constructed considering convection effect and the vibration mitigation characteristic of DCSFD was researched. The DCSFD film force linearity r FSFD was proposed. The response characteristics of rigid rotor containing DCSFD were studied based on the DCSFD model. A response experiment of the DCSFD was arranged, and the model was verified. A good consistence was achieved between the simulation and experiment. The experiment and simulation result manifests that the unbalance response of DCSFD was smaller than that of SFD at every excitation frequency. The DCSFD could inhibit the nonlinear vibration such as the bistability and bifurcation due to big mass eccentricity, and nonlinear film force for the DCSFD film force linearity was bigger than that for SFD. The thickness ratio of inner and outer film, pressure loss coefficient, and inner film thickness were the important parameters that have great influence on DCSFD vibration mitigation characteristic.

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“…e DCSFD was proposed to prevent fatigue in an SFD in a rotor-SFD system. A number of studies [12][13][14][15][16][17][18][19] have been dedicated to the DCSFD in the last 50 years. Moraru et al [13][14][15][16] constructed a numerical model for a rotor supported on the DCSFD, and they presented results obtained while the inner sleeve is released and both oil films are operational.…”

Section: Introductionmentioning

confidence: 99%

“…A number of studies [12][13][14][15][16][17][18][19] have been dedicated to the DCSFD in the last 50 years. Moraru et al [13][14][15][16] constructed a numerical model for a rotor supported on the DCSFD, and they presented results obtained while the inner sleeve is released and both oil films are operational. Different from rigid supported housing, Rezvani and Hahn [17] proposed a DCSFD with a spring support which can avoid the jump and aperiodic response of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of the Effect of Cavitation on Dual Clearance Squeeze Film Damper

Feng

Luo

Yang

et al. 2021

Shock and Vibration

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A new dynamic model is developed for the dual clearance squeeze film damper (DCSFD) considering the effect of cavitation in this paper. The relationship between the eccentricities of the inner and outer films is achieved based on the equations of motion. The Reynolds equation and Rayleigh–Plesset equation are employed to describe the kinetic properties of DCSFD and the cavitation effect of film, respectively. Under the assumption of compressible fluid, the pressure distribution of DCSFD is finally obtained by the numerically iterative method. The film pressure distribution in the outer layer (including the positive and negative pressure zones) obtained from the experimental test agrees well with the numerical prediction, which verifies the validity of the proposed numerical model. In Section 5, the effects of oil temperature, inlet pressure, eccentricity, and whirling frequency on the cavitation in the film are investigated systematically and experimentally. The experimental results indicate that cavitation mainly affect the pressure in the negative pressure zone of the inner and outer film of DCSFD, but has little influence on the pressure in the positive pressure zone. The area of cavitation increased with eccentricity; when the inner eccentricity reached 0.1 or above, the area near the injection hole of film also generated a small zone of negative pressure. The numerical model and the experimental results in this paper are valuable for further research and engineering applications of DCSFD.

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Dynamic Modeling of a Dual Clearance Squeeze Film Damper. Part II

Cited by 7 publications

References 19 publications

Analysis of the nonlinear dynamic response of a rotor supported on ball bearings with floating-ring squeeze film dampers

Analysis of the nonlinear dynamic response of a rotor supported on ball bearings with floating-ring squeeze film dampers

Study on the Vibration Mitigation Characteristic of Dual Clearance Squeeze Film Damper

Numerical and Experimental Investigation of the Effect of Cavitation on Dual Clearance Squeeze Film Damper

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