Titlebook: Dynamics of Rotors and Foundations; Erwin Krämer Book 1993 Springer-Verlag Berlin Heidelberg 1993 Foundations.Rotordynamik.Rotors.assembly

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Influence Coefficients force and moment appears as the product of an influence coefficient and a displacement, either translational or angular (rotational). In this way we can find all the terms on the left-hand side of the equations of motion. This means that the determination of the influence coefficients is very impor

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Resultsilst one can to some extent discuss the general behaviour of the simple model, it is not possible for the complex model. Thus, we shall consider a few examples and report results from further calculations. The essential vibration behaviour of the rotors of turbo machines will thus be characterized.

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Wien, der urbane Brennpunkt Mitteleuropas,Rotors of machines have, while in operation, a great deal of rotational energy, and a small amount of vibrational energy. The purpose of rotordynamics as a subject is to ascertain how this latter can be kept as small as possible. Its significance can be underlined by the following example.

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https://doi.org/10.1007/3-540-27908-3In Chap. 7 the vibration behaviour of a horizontally supported rotor with oilfilm bearings was described. This horizontal support gives rise to journal eccentricity due to rotor weight except for the case of further forces producing a zero resultant.

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https://doi.org/10.1007/3-540-27908-3Figures 14.1 to 14.3 show typical examples of rotor systems whose characteristics will be investigated in this part. These systems consist of rotor, bearings and bearing pedestals and models will be devised which will enable the bending vibrations of real rotors to be obtained sufficiently accurately, using reasonable computing time.

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The one Degree of Freedom SystemThe simplest rotordynamic model is the . discussed in Chap. 3. Its behaviour allows it to be considered essentially as having one degree of freedom. The properties of a one degree of freedom model will therefore be considered first.

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