Parametric Study of Vibration in Articulated Towers

by Kenneth C. Johns, Asst. Prof.; Dept. of Civ. Engrg., Univ. of Sherbrooke, Sherbrooke, Quebec, Canada,
Colin L. Kirk, Sr. Lect.; Struct. and Aerospace Dynamics, Cranfield Inst. of Tech., Cranfield, Bedford, England,

Serial Information: Journal of the Structural Division, 1975, Vol. 101, Issue 7, Pg. 1631-1634

Document Type: Journal Paper


This note reports on the possibility of allowing some extra movement in a tower-like structure. This movement would activate a damper and thus dissipate energy and hopefully reduce response. Examination of a simple single degree-of-freedom bar and spring mechanism showed that it was actually possible, under certain circumstances, to reduce dynamic response by the introduction of an additional degree-of-freedom, e.g., a hinge, equipped with finite stiffness and viscous damping. The idea is not obvious, but is attractive, since no extra weight is added, and passive viscous dampers, being unsophisticated, seem reliable enough.

Subject Headings: Damping | Parameters (statistics) | Vibration | Degrees of freedom | Energy dissipation | Dynamic response | Hinges | Stiffening

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