Why damper is used in vibration?

Vibration dampers are used to absorb vibration emanating from machinery, pedestrian traffic, etc. primarily to reduce the noise associated with such vibration and to procure a more comfortable environment.

How does a torsional vibration damper work?

About Torsional Vibration Dampers Torsional Vibration Dampers absorb rotational vibrations in internal combustion engines. The dampers are particularly effective in conjunction with decoupled pulleys, which keep crankshaft irregularities away from the belt drive and auxiliaries.

What are the effect of vibration on transmission line?

When the conductor experiences vibration, the transmission lines experience high amplitudes of vibrations from wind forces and can lead to fatigue of the transmission lines [1].

How do I reduce my aeolian vibration?

Dampers of many different types have been used since the early 1900s to reduce the level of aeolian vibration within the span and, more importantly, at the supporting structures. The damper most commonly used for conductors is the Stockbridge type damper, named after the original invention by G.H.

How does a damper reduce vibration?

As the name suggests, dampers are used to damp or reduce the frequency of oscillation of the vibrating components of the machine by absorbing a part of energy evolved during vibration.

What is damping in vibration?

damping, in physics, restraining of vibratory motion, such as mechanical oscillations, noise, and alternating electric currents, by dissipation of energy. Critical damping just prevents vibration or is just sufficient to allow the object to return to its rest position in the shortest period of time.

What is a viscous vibration damper?

Viscous Dampers Design A viscous damper has a sealed outer housing with a precision machined hub. Inside of the housing is an inertia ring with a viscous fluid (specialized silicone) filling the cavity.

What does a damper do on a tennis racquet?

The main purpose of a vibration dampener is to reduce the amount of vibration that you feel when a tennis ball hits your strings. This might help you reduce fatigue if you’re involved in a long match.

What are galloping vibrations in overhead transmission line conductors?

Galloping is a low frequency, large amplitude, wind-induced vibration of both single and bundle overhead conductors, with a single or a few loops of standing waves per span. It is caused by moderately strong, steady crosswind acting upon an asymmetrically-iced conductor surface.

What is conductor vibration?

The three forms of wind-induced conductor vibrations are Aeolian vibration, galloping and subspan oscillation. Aeolian vibration is caused by an alternating wind force, which arises from a pressure difference associated with a regular formation of vortices behind a conductor.

How does a Stockbridge damper work?

So how do Stockbridge dampers actually work? In simple terms, Kranz says, the vibration in the structure is dampened “through the shaking of the two weights on either end of the damper.”

What are the vibrations in overhead transmission line conductor?

Aeolian vibration is a type of motion caused by wind on conductors and overhead shield wires of transmission and distribution lines. Aeolian vibration is characterised by low amplitude (conductor diameter) high frequency (5 to 150 Hz).

What is a damper in transmission line?

A damper is basically a device which is so designed to absorbed vibration energy and prevent vibration in Transmission Line. Stock Bridge damper is most popular damper used for prevention of vibration in Transmission Line.

How to prevent vibration in transmission line?

Vibration in Transmission Line is solved by using specially designed dampers. A damper is basically a device which is so designed to absorbed vibration energy and prevent vibration in Transmission Line.

What happens when a damper is placed on a vibrating conductor?

When the damper is placed on a vibrating conductor, movement of the weights will produce bending of the steel strand. The bending of the strand causes the individual wires of the strand to rub together, thus dissipating energy.

As in figure right end, Stockbridge Damper has two masses at the ends of a connecting rod or stiff cable which gives it a dumbbell shape. It is connected to the line conductor immediately above it through a clamp. They can effectively damp out Aeolian wind vibrations. If playback doesn’t begin shortly, try restarting your device.