Abstract
The energy-absorbing characteristic of liquid sloshing can be used to reduce the dynamic response of an offshore platform. The finite element program for dynamic analysis of two-dimensional fixed offshore platforms, developed by DuVall1, is extended to include the operation of a deck-mounted liquid vibration absorber. The structural response of the model is determined for a digitized wave height spectrum, with and without the vibration absorber in operation. The system response is determined for variations of the following parameters: cylinder radius, liquid height, mass, frequency, and damping of the absorber. Possible methods of frequency tuning, and damping device mechanisms are suggested.
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