Survey of Experimental Data for Fixed Geometry Hydrodynamic Journal Bearings

Swanson, Erik; Kirk, R. G.

doi:10.1115/1.2833874

Cited by 22 publications

(11 citation statements)

References 90 publications

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“…He found that the typical agreement of the various experimental methods with theoretical values was within 20 percent, though some cases of discrepancies of 100 percent or more had been reported by some authors. Swanson and Kirk provided a literature review of fixedgeometry bearing tests in tabular format [23].…”

Section: Previous Literature Reviewsmentioning

confidence: 99%

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Babu

Raj²,

Lakshmanan

2015

J. mech.

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The journal bearings are used to support high-speed rotors in turbo machinery which often operate above the rotor first bending critical speed. This bearing provide both lateral support and dynamic coefficients: Stiffness, damping, and mass terms, related to machine vibrations. The various methods of identifying journal bearing dynamic characteristics, from measured data, obtained from different measurement systems, are reviewed. The various approaches to the bearing identification problem are discussed. The various data processing methods in the time and frequency domains are presented. Also, vibration and condition monitoring techniques are presented. In this review, the relative strengths and weaknesses of bearing are presented and developments and trends in improving bearing measurements are documented. Future trends of journal bearing are discussed.

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Section: Previous Literature Reviewsmentioning

confidence: 99%

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Babu

Raj²,

Lakshmanan

2015

J. mech.

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“…Childs (1993) gave a comprehensive survey of the rotordynamic experimental data for liquid and gas annular seals and turbines and pump impellers along with their geometry and operating conditions. Swanson and Kirk (1997) presented a survey in tabular form of the experimental data available in the open literature for fixed geometry hydrodynamic journal bearings. They categorized the literature based on bearing type, bore diameter, length to diameter ratio and type of data available (i.e.…”

Section: Referencesmentioning

confidence: 99%

Identification of Dynamic Bearing Parameters: A Review

Tiwari¹,

Lees²,

Friswell³

2004

shock vib digest

132

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In this paper, we present a review of the experimental identification of dynamic parameters of bearings in a rotating machine. Major emphasis is given to vibration-based identification methods and the review encompasses descriptions of experimental measurement techniques, mathematical modeling, parameter extraction algorithms and uncertainty in the estimates applied to a variety of bearings. The parameter extraction algorithms include the descriptions of governing equations of the rotor-bearing system and identification methods in both time and frequency domains. The identification techniques have been classified based on methods used to excite the system. The review includes a variety of bearings and similar components, which play an active link between the rotating and stationary parts of a machine. Based on the state of the art in bearing identification, conclusions are made and future directions are suggested.

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“…He found that the typical agreement of the various experimental methods with theoretical values was within 20 percent, though some cases of discrepancies of 100 percent or more had been reported by some authors. Swanson and Kirk provided a literature review of fixed-geometry bearing tests in tabular format [25].…”

Section: Previous Literature Reviewsmentioning

confidence: 99%

Identification Methods and Test Results for Tilting Pad and Fixed Geometry Journal Bearing Dynamic Coefficients – A Review

Dimond

Sheth

Allaire

et al. 2009

Shock and Vibration

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Fluid film journal bearings (FFBs) are used to support high-speed rotors in turbomachinery which often operate above the rotor first bending critical speed. The FFBs provide both lateral support and dynamic coefficients: stiffness, damping, and mass terms, related to machine vibrations. Detailed numerical values of the bearing dynamic characteristics are necessary for proper design and operation of rotating machinery.The methods of the identification of fluid film journal bearing static and dynamic characteristics, particularly the bearing stiffness, damping, and mass coefficients, from measured data, obtained from different measurement systems, is reviewed. Many bearing tests have been performed to validate a number of different theoretical models, including the classical Reynolds isoviscous model. More advanced bearing models include the thermohydrodynamic (THD), and thermoelastohydrodynamic (TEHD) approaches. The advanced models also include turbulence effects which are important as rotor speeds continue to increase. The range of measured bearing data no longer includes current operational conditions.The various approaches to the bearing identification problem are discussed, including the different force excitation methods of incremental loading, sinusoidal, pseudorandom, impulse, known/additional unbalance, and non-contact excitation. Also bearing excitation and rotor excitation approaches are discussed. Data processing methods in the time and frequency domains are presented. Methods of evaluating the effects of measurement uncertainty on overall bearing coefficient confidence levels are reviewed.In this review, the relative strengths and weaknesses of bearing identification methods are presented, and developments and trends in improving bearing measurements are documented. Future trends in journal bearing identification improvement are discussed.

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Survey of Experimental Data for Fixed Geometry Hydrodynamic Journal Bearings

Cited by 22 publications

References 90 publications

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Identification of Dynamic Bearing Parameters: A Review

Identification Methods and Test Results for Tilting Pad and Fixed Geometry Journal Bearing Dynamic Coefficients – A Review

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