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A STUDY ON MODE LOCALIZATION PHENOMENA: INFLUENCES OF THE STIFFNESS AND THE MASS OF THE COUPLER ON MODE LOCALIZATION

✍ Scribed by Dong-Ok Kim; In-Won Lee

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 379 KB
Volume: 216
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1998.1679

No coin nor oath required. For personal study only.

✦ Synopsis

The influences of the stiffness and the mass that constitute a coupler between two substructures of the periodic structures on mode localization are studied theoretically, and the results are confirmed by numerical examples. The results of this study show that the mass as well as the stiffness of the coupler has significant influences on mode localization and weak coupling conditions. The mass of the coupler makes a periodic structure sensitive to mode localization especially in higher modes while the stiffness does in all modes. By introducing the large mass and the large stiffness into the coupler, an interesting phenomenon of delocalization can be observed in some modes for which mode localization does not occur or is very weak although structural disturbances are severe. A simple structure consisting of two substructures, each with a lumped mass and two stiffnesses, and a coupler is analysed theoretically. For example, structures for numerical analysis, simply supported continuous two-and three-span beams with couplers having a rotational stiffness and a rotational mass are considered.

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