Stabilizing structures against oscillation

Details Stabilizing structures against oscillation Stabilizing structures against oscillation

1980-01-16

1982-03-23

Ridgill, Jr., James L.

Static structures (e.g., buildings)

Controlled by condition responsive means

52173R, 52573, 52167, 98 58, E04H 1200

Patent

active

043206026

ABSTRACT:
A device for stabilizing structures such as chimneys and like stacks against transverse oscillation, comprising a mass connected to the structure by a pendulum suspension so as to oscillate in a direction transverse to the axis of the structure. The pendulum suspension includes a damper. The oscillation frequency of the mass/pendulum/damper assembly is matched to the natural frequency of the structure's vibrations, whereby the latter are attenuated. The mass may be in the form of a ring, suspended from the top of the structure by at least three pendulum/damper units spaced around the periphery. The units may also include springs or other devices to modify the natural frequency of oscillation of the device. In one version of the invention the mass comprises a first ring suspended from the structure, and a second ring similarly suspended from the first ring.

REFERENCES:
patent: 2053226 (1936-09-01), Ruge
patent: 3174589 (1965-03-01), Chen
patent: 3245177 (1966-04-01), Chen
patent: 3246431 (1966-04-01), Faerber
patent: 3411427 (1968-11-01), Graham et al.
patent: 4031173 (1977-06-01), Rogers

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