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Hapco Impact Damper
Hapco manufactures an impact damper that is successfully used on luminaires to suppress high frequency modes caused by vortex shedding. The damper is constructed from a 2-in (51- mm) diameter aluminum pipe with a rod/teflon ring placed loosely inside. As the pipe vibrates laterally, the teflon ring impacts the inside of the aluminum pipe.
Damping Results
In-Plane Response |
Non-retrofitted Pole  Non-retrofitted Pole  |
In-Plane Response |
Retrofitted Pole  Retrofitted Pole  |