✦ LIBER ✦

OPTIMAL DYNAMIC ABSORBER FOR A ROTATING RAYLEIGH BEAM

✍ Scribed by Marko Jorkama; Raimo von Hertzen

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 223 KB
Volume: 217
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1998.1763

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✦ Synopsis

A theory of dynamic vibration absorbers for an elastically mounted rotating Rayleigh beam under a distributed load is presented. The novel features due to rotational motion are demonstrated via a numerical example of a paper machine roll with dynamic absorbers attached to the bearing houses. Depending on the horizontal to vertical bearing stiffness ratio, the optimal frequency response function may exhibit three peaks of equal height instead of the conventional two. It is also shown that the optimal values for absorber stiffness and damping depend significantly on the rotational speed of the beam and asymmetry of the bearing support. Finally, the effectiveness of the optimal absorber is analysed as a function of the absorber size and rotational speed.

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