Vibration of large turbo-rotors in fluid-film bearings on an elastic foundation

Gasch, Robert

doi:10.1016/0022-460x(76)90407-7

Cited by 58 publications

(24 citation statements)

References 1 publication

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“…When the foundation thickness is greater than 2 mm, the increase in thickness has no e!ect on the reduction of the unbalance responses. 9. CONCLUSION This paper has extended the discussion on the foundation dynamics of the rotor-bearing system, in which three foundation types are considered.…”

Section: Rotor-bearing-foundationmentioning

confidence: 98%

An Investigation in Stiffness Effects on Dynamics of Rotor-Bearing-Foundation Systems

Yuan

Chang

Tsai

et al. 2000

Journal of Sound and Vibration

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Section: Rotor-bearing-foundationmentioning

confidence: 98%

An Investigation in Stiffness Effects on Dynamics of Rotor-Bearing-Foundation Systems

Yuan

Chang

Tsai

et al. 2000

Journal of Sound and Vibration

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“…Experimental approach to include foundation effect using dynamic stiffness matrices first was shown in 1976 by Gasch [21]. Procedure of generating matrices for foundation structure based on the test data was described by Stephensone and Rouch [22].…”

Section: Recent Methods For Foundation Structure Modelingmentioning

confidence: 99%

Theoretical Modeling for a Rotor-Bearing-Foundation System and Its Dynamic Characteristics Analysis

Hong

Shaposhnikov

Zhang

et al. 2015

Proceedings of the 9th IFToMM International Conference on Rotor Dynamics

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Modeling for rotor-bearing-foundation systems is one of the key bases for efficient dynamic analysis in the field of turbomachinery. However it should be noted that the term foundation structure should be interpreted depending on the purpose of the rotating machine. Thus in heavy power machinery it is usually a massive fixed base structure made of steel frames and concrete e.g. for power generating turbine units, but in aerospace it is relatively light and flexible beam type wing for aircraft engines. Since rotating machinery such as modern aircraft engines usually designed, marketed and sold for the most part based on analytical and numerical predictions, methods to incorporate the foundation influence effect in rotordynamic calculations are very important. The aim of the current paper is to observe recent efficient approaches for foundation structure modeling and to point out contemporary methods used by engineers for foundation structure parameters identification. Further in the simulation section of the paper simplified models were created in modern FEM software packages in order to demonstrate foundation structure influence on the dynamics of rotor-bearing system and their interaction.

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“…Dimaragonas (1975) presented a more general model that included the rotatory inertia, the gyroscopic effects, and the internal damping. Gasch (1976) presented a model that is similar to Dimaragonas', but included the effect of distributed eccentricity. At the same time, Nelson and McVaugh (1976) published their model that included rotatory inertia, gyroscopic moments, and axial load.…”

Section: Dynamic Modeling and Analysis Of Rotor Systemmentioning

confidence: 99%

Active Balancing and Vibration Control of Rotating Machinery: A Survey

Zhou¹,

Shi²

2001

The Shock and Vibration Digest

189

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Vibration suppression of rotating machinery is an important engineering problem. In this paper, a review of the research work performed in real-time active balancing and active vibration control for rotating machinery as well as the research work in dynamic modeling and analysis techniques of rotor systems are presented. The basic methodology and a brief assessment of major difficulties and future research needs are also given.

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Vibration of large turbo-rotors in fluid-film bearings on an elastic foundation

Cited by 58 publications

References 1 publication

An Investigation in Stiffness Effects on Dynamics of Rotor-Bearing-Foundation Systems

An Investigation in Stiffness Effects on Dynamics of Rotor-Bearing-Foundation Systems

Theoretical Modeling for a Rotor-Bearing-Foundation System and Its Dynamic Characteristics Analysis

Active Balancing and Vibration Control of Rotating Machinery: A Survey

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