Method and apparatus for damping vibrations

Details Method and apparatus for damping vibrations Method and apparatus for damping vibrations

1991-01-17

1992-12-08

Ridgill, Jr., James L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

52167R, E04B 198, E04H 902, F16F 900

Patent

active

051686732

ABSTRACT:
The invention discloses methods and apparatuses for vibrational energy removal in a structural system. Sensors in the structure determine the vibration modal energy content of the structure only in real time, and detect whether controllable springs or "stiffeners" are in tension, compression, or are relaxed. Relaxed springs are stiffened or made less stiff so as to transfer energy in low vibrational modes into higher modes resulting in an accelerated passive dissipation of system energy. The technique is applicable for vibration damping in aircraft, watercraft, drilling platforms, space, civil, and other structures.

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patent: 4429496 (1984-02-01), Masri
patent: 4635892 (1987-01-01), Baker
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patent: 4799339 (1989-01-01), Kobori et al.
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patent: 4922667 (1990-05-01), Kobori et al.
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"Active Seismic Response Control Systems for Nuclear Power Plant Equipment Facilities" by Kobori, et al Nuclear Engineering and Design, vol. 111 pp. 351-356 1989.

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