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A similar aeolian phenomenon is flutter, caused by vortices on the leeward side of the wire, and which is distinguished from gallop by its high-frequency (10 Hz), low-amplitude motion. [ 2 ] [ 3 ] To control flutter, transmission lines may be fitted with tuned mass dampers (known as Stockbridge dampers ) clamped to the wires close to the towers ...
A Stockbridge damper is a tuned mass damper used to suppress wind-induced vibrations on slender structures such as overhead power lines, [1] long cantilevered signs [2] and cable-stayed bridges. The dumbbell-shaped device consists of two masses at the ends of a short length of cable or flexible rod, which is clamped at its middle to the main ...
The groove pattern is engineered to suit the rope's length, diameter and construction type. Spooling under tension In any multi-layer spooling application it is important that when the rope is first installed on the drum, it is done so under tension to avoid any slack on inner layers that can be crushed or nicked against the groove walls by ...
A cable reel is a round, drum-shaped object such as a spool used to carry various types of electrical wires. [1] Cable reels, which can also be termed as drums, have been used for many years to transport electric cables, fiber optic cables [ 2 ] and wire products.
This type of head and shoulders pattern has more than one left or right shoulders or head. It is also known as multiple head and shoulders pattern. [citation needed] One particular type is known as a Wyckoff distribution, which usually consists of a head with two left shoulders and a weaker right shoulder. [citation needed]
In electronics and communication, flutter is the rapid variation of signal parameters, such as amplitude, phase, and frequency.Examples of electronic flutter are: Rapid variations in received signal levels, such as variations that may be caused by atmospheric disturbances, antenna movements in a high wind, or interaction with other signals.
The three ropes are so tightly wound counter to the weave of the constituent ropes that the fibers are compressed and the individual weaves stressed, sealing out the water and resulting in a length of about 180 metres (100 fathoms), the UK traditional definition of cable length. Using a cable, the raising of the anchor, or any activity ...
If the cable comes off the spool the same way it goes on, the internal 'lay' is preserved, and the cable isn't damaged or twisted internally. If a cable is straight coiled and then pulled from the coil, it has the effect as coiling cable on a spool and then pulling the cable off the top of the spool, imparting a twist in the cable with every ...