Abstract: The development of the concept of spring and damping coefficients for journal bearings is briefly reviewed. Methods for computing the coefficients are described, and their use in rotor dynamics ...

Abstract: The dynamic characteristics of a gas bearing can be represented by a set of spring and damping coefficients (impedances) which are functions of the static load on the bearing, the rotating ...

Abstract: A theoretical analysis is presented for the threshold of instability for a rigid rotor supported in hydrostatic gas journal bearings. Both rotationally induced instability (hybrid instability) and ...

Abstract: Assuming sufficiently small journal amplitudes, a rotor supported in gas-lubricated bearings represents a nonconservative, nonself-adjoint system with frequency dependent support coefficients. A method ...

Abstract: In hydraulic pumps of the positive displacement type, the shoes which guide the piston motion may be designed as pivoted slider bearings. One such design, where the bearing geometry is that ...

Abstract: This paper analyzes the load-carrying capacity of the externally pressurized gas journal bearing, including the effect of journal rotation and vibration. The analysis assumes small eccentricity ...

Abstract: A method is described for calculating the coupled torsional-lateral vibrations in a geared system of rotors. It considers both forced vibrations, caused by mesh errors or by mass unbalance, and ...

Abstract: When designing a rotor it is frequently required to shift one or several critical speeds by making proper changes in rotor dimensions. This paper presents a scheme for computing the percentage ...

Abstract: A method is described for calculating the threshold speed of instability and the damped critical speeds of a general flexible rotor in fluid-film journal bearings. It is analogous to the ...

Abstract: An analysis is presented for calculating the response of a general flexible rotor in fluid-film bearings to forced and transient excitation. It is a modal method where the governing system ...