Mechanical damping system for tubular busbars - comprises offset masses flexibly coupled at two points to the busbar

摘要

Masses are coupled to the busbar by a saddle with an elastic connection between the saddle and the centres of gravity. A second flexible connection, typically a cable, joins the masses to a second saddle clamped some distance along the busbar. If the bar attempts to vibrate the masses are set in motion and they twist and flex the cables. The friction in the cable transforms the vibration energy into heat to provide damping. The resistance of the cable can be chosen to give the correct damping. If there is more than one cable, then by selection of resistance the range of frequencies which can be effectively damped can be extended.