Vibration control

Our damping systems aim to control aeolian vibrations and sub-span oscillations, safeguarding transmission line integrity

Sicame damping systems vibrations models induced by the wind on single and bundle conductors which generate undesirable and dangerous phenomena on the OHTL:

Aeolian vibration (vortex shedding)
Wake-induced oscillation (sub-span oscillation)
Galloping

We developed the models which are linked to the tensile conductor loading and the particular evolution of self-damping linked to the use of the HTLS conductor. Vibration levels are controlled by Sicame using damping systems of spacer dampers and vibration dampers.

Spacer dampers (SD)

The range of Sicame SD covers all possible applications:

Voltage up to 1.200 kV
Bundle spacing up to 1.200 mm
Any conductor types
Different clamping solutions

Vibration dampers (VD)

Installed on armor rods sets to protect the soft aluminum and reduce the local temperature of the conductor. Galvanized steel, zinc-coated, or stainless-steel messenger cable options. Expert advice for optimal performance.

Plastic spiral vibration damper

Spiral Vibration Dampers (SVD) effectively control Aeolian vibration on small diameter cables (1.35") and conductors and avoids cable fatigue, and hardware failure.

Analytical evaluation:

Damping systems design: An optimum damping system is designed to evaluate the two vibration phenomena (Aeolian and sub-conductor vibration) on the OHTL, by means of a damping study, carried out with a validated software.

Type of conductor (stranding, diameter, mass per unit length) Bundle spacing in inches or mm
Tensile load at the coldest period of the year
EDS
Span lengths (presence of long spans)
Type of terrain
Maximum wind speed
Type of spacer dampers
Number of spacer dampers
Staggering of spacer dampers