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Two-degree-of-freedom rotational-pendulum vibration absorbers

✍ Scribed by Shang-Teh Wu; Yu-Rong Chen; Se-Si Wang

Publisher: Elsevier Science
Year: 2011
Tongue: English
Weight: 1023 KB
Volume: 330
Category: Article
ISSN: 0022-460X
DOI: 10.1016/j.jsv.2010.09.028

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✦ Synopsis

This paper presents experimental as well as analytic results on a rotational-pendulum vibration absorber. The characteristic frequencies of the absorber can be tuned dynamically by adjusting the rotational speed. The device is coupled to the primary structure through a mechanical spring, thus possessing two natural modes of vibrations in the vertical plane. When the primary structure is excited by a harmonic disturbance of which the frequency matches one of the two natural frequencies, the oscillations will be minimized. Whether the pendulum absorber is operating in a resonant mode can be detected by measuring the phase difference between the motions of the primary structure and the absorber, which provides an efficient way to tune the rotational speed for optimal performance. Experimental results confirm the theoretical developments and also demonstrate the effectiveness of the proposed scheme.

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