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Civil and Architectural Engineering|College of Engineering and Applied Science

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.


hapco

Damping Results


In-Plane Response

Non-retrofitted Pole

LLB

Non-retrofitted Pole

FMB

In-Plane Response
Out-of-Plane Response

Retrofitted Pole

0MS

Retrofitted Pole

R0F


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