| 摘要 |
An improvement in damping vibrations in the cables of cable stayed bridges involves the provision of one or more viscous damping elements within the space between t he cable and a surrounding stay tube. The direction of action of the damping element(s) is generally parallel to the longitudinal axis of the cable. In one embodiment a toggle mechanism is provided at each end of a viscous damping element to connect the element to both the sta y tube and the cable. Each toggle mechanism is pivotally connected to the viscous damping element as well as to the stay tube and cable so that transverse vibrations occurring in the cable are transmitted via the toggle mechanism to the viscous damping element so as to effectively dampen such vibrations. In a typical scenario the viscous damping element will be a pist on and cylinder arrangement with a viscous fluid retained within the cylinder, similar to an automotive shock absorber.
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