● TITLE: Optimal damping of flexibly-mounted rotor
● AUTHORS: Porat, I. (1934-2012)
● SOURCE: Israel J. Technol, v. 7, pp. 235-245 (1969).
● LANGUAGE: English.
● ABSTRACT SOURCE: Israel J. Technol, v. 7, p. 235 (1969).
● ABSTRACT:
A flexibly-mounted rotor operates well at high speeds and low damping.
Hence the need for frequency-dependent damping that would be low at the level of
the rotational frequency, and increase at the critical points. A common means for
achieving this type of damping consists in providing the system with additional
degrees of freedom and applying the damping to the additional masses instead of
directly to the rotor. Satisfactory damping then minimizes the divergent
frequencies (so as to simplify the design) and ensures equality of the natural
frequencies of the system and damper. In that case high damping within a narrow
range (bandwidth) is obtainable under minimal friction. The proposed solution
consists in proving the motion-parallelism principle for a high-speed rotor
(which is important per se), while reducing the number of degrees of freedom of
the system, regarded as consisting of masses and springs only, in which case a
simple criterion for optimal damping is obtainable.
● 9 references:
Bousso, D., "A stability criterion for rotating shafts,"
D.Sc. thesis (1963) (In Hebrew)
Abstract in English
Abstract in Hebrew
and more 8 references.
● COMMENT:
Proceedings of the Seventeenth Israel Annual Conference on Theoretical and Applied
Mechanics, Haifa, 1969.
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