| dc.description.abstract | This paper is concerned with torsional vibration in the design, development, and fault diagnosis and correction of machine systems. The physical behavior of torsional vibrations in shafting systems and sources of torsional excitation are reviewed. The concepts of torsional natural frequencies, critical speeds, resonance, and response (forces, stresses, and motions) are explained. The following methods for modeling and calculating natural frequencies and responses are described: lumped and continuous parameter models, the Holzer method, the modal response method, and direct integration of equations of motion. The solution of a transient torsional vibration problem of a synchronous motor drive system is explained. The measurement of torsional vibration in both the field and the laboratory is described; monitoring and problem correction are emphasized. Systems subjected to torsional vibrations are used to illustrate measuring techniques. | en |
