Applications of sweep frequency rotating force perturbation methodology in rotating machinery for dynamic stiffness identification

Conference · Tue Dec 31 23:00:00 EST 1991

OSTI ID:6345128

Muszynska, A; Bently, D E; Franklin, W D; Grant, J W; Goldman, P ^[1]

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1. Bently Rotor Dynamics Research Corp., Minden, NV (United States)

This paper outlines the sweep frequency rotating force perturbation method for identifying the dynamic stiffness characteristics of rotor/bearing/seal systems. Emphasis is placed on nonsynchronous perturbation of rotating shafts in a sequence of constant rotative speeds. In particular, results of the identification of flexible rotor multi-mode parameters and identification of fluid forces in seals and bearings are given. These results, presented in the direct and quadrature dynamic stiffness formats, permit the separation of components for easy identification. Another example of the perturbation method application is the identification of the lateral-torsional coupling due to shaft anisotropy. Results of laboratory rig experiments, the identification algorithm, and data processing techniques are discussed. 31 refs.

• OSTI ID: 6345128
• Report Number(s): AIAA-Paper--92-GT-176; CONF-920602--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
420400* -- Engineering-- Heat Transfer & Fluid Flow
BEARINGS
DYNAMICS
EQUIPMENT
FLUID MECHANICS
HYDRODYNAMICS
MACHINE PARTS
MACHINERY
MECHANICS
MOTION
PERTURBATION THEORY
QUADRATURES
ROTATION
SEALS
SHAFTS
TURBOMACHINERY