Cable stay damper band and method of use for reduction of fluid induced cable vibrations
US6705440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Apr 30, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F7/1005
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Fluid current induced vibrations, as well as vortex shedding vibrations induced in a cable stay or a similar elongated, cylindrical element are dampened and substantially eliminated by applying a plurality of flexible active or passive damper bands to the cable at spaced intervals. In underwater currents, the damper bands force or channel the fluid flow over a circular cross-sectional shape, which inhibits lift, and therefore damps the cable stay oscillations. These damper bands can be retrofit to existing cables or can be installed on new cables. Each damper band may include a shiftable mass and an energizing device for facilitating assisted shifting of the mass. A control assembly can actuate all or selected ones of the energizing devices in response to sensed magnitudes of cable stay vibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.