Anti-vibration hardware for fiber optic cable laying

Anti-vibration hardware, such as spiral dampers, Stockbridge-type hammers, and preformed suspension clamps, is essential for protecting ADSS and OPGW fiber optic cables from wind-induced and Aeolian vibrations.Types of Anti-Vibration Hardware1. Spiral Vibration Dampers Spiral dampers are designed to reduce Aeolian vibration on bare ADSS cables. They consist of a helically-formed damping section that wraps around the cable, providing a large contact area to dissipate vibration energy. The gripping section gently holds the cable without causing damage. These dampers are weather-resistant, non-corrosive, and color-coded to indicate the appropriate cable diameter range, ensuring proper installation ( ). 2. Stockbridge-Type or Anti-Vibration Hammers These devices, often called anti-vibration hammers, are suspended at cable support points to absorb vibration energy and alter the cable's natural frequency. They typically include a galvanized cast iron hammer head, steel strand, aluminum alloy clamp, and stainless steel bolts. The design covers a wide frequency range (6–150 Hz) and prevents ice or water accumulation. Protective strips are required when installing directly on ADSS or OPGW cables to avoid damage ( ). 3. Preformed Suspension Clamps with Damping Pads Preformed suspension clamps are used to fix cables on insulator strings or towers. They often incorporate hyperbolic waist drum damping pads that enclose the cable at suspension points, providing strong grip, minimal corona, and low magnetic loss. These clamps are suitable for high-voltage lines (220 kV and above), long spans, and areas prone to ice or heavy wind ( ).Installation GuidelinesQuantity per Span: The number of dampers depends on cable diameter and span length. For example, smaller diameter cables (