Light wind vibration characteristics and common anti-vibration methods:

• The probability of vibration of conductors and static lines is high, because the instability of air flow in the air will cause breeze vibration. If anti-vibration measures are not taken, most lines will be in a state of breeze vibration for a period of time.

• The amplitude is small and the frequency is high. Generally, the vibration amplitude of the breeze does not exceed 10mm [The vibration and anti-vibration of the transmission line conductors, the frequency is between a few HZ and 100HZ. For overhead ground wires, fretting wear occurs under small vibrations. If the external deposits strongly corrode the stainless steel, the fretting damage will cause the steel core to rust rapidly and reduce the impact toughness.

• It is obviously affected by terrain, span, erection height and erection tension. Breeze vibrations are likely to occur on open ground, and the larger the distance, the easier it is to generate breeze vibrations. For high-voltage lines, the erection height is relatively high. At this time, the airflow on the ground plane is less affected by the ground wire, and it is easier to generate breeze vibration. The greater the erection tension, the more serious the damage to the ground conductor due to vibration.

• The vibration wave of the wire is distributed along the wire in the form of a "standing wave", the waveform is a sine wave, and the amplitude of the antinode along the wire is relatively large.

Stockbridge Damper Instructions/Descrption

Common anti-vibration methods include installing Stockbridge dampers, damper wires, or a combination of Stockbridge dampers and damper wires. High-frequency vibrations are mainly damped by damping wires, and low-frequency vibrations are mainly damped by anti-vibration dampers.

Due to the small span and the low suspension point of the wire, the ordinary span wire generally uses an anti-vibration hammer to prevent vibration. When vibrating, the wire drives the anti-vibration hammer to vibrate together, and the vibration energy of the wire is absorbed by the anti-vibration hammer, thereby protecting the anti-vibration and anti-vibration of the transmission line wire.