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Floating structure using mechanical braking

  • US 4,913,592 A
  • Filed: 02/24/1989
  • Issued: 04/03/1990
  • Est. Priority Date: 02/24/1989
  • Status: Expired due to Term
First Claim
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1. A structure for floating over a seabed and being subject to resonant oscillatory heave in response to wave action, comprising:

  • at least one long member extending from said seabed, said long member having a bottom end fixed to said seabed and an upper end suspended from said structure;

    first means coupled between said long member and said structure for applying a tension force to said long member;

    second means for generating frictional coulomb damping forces on said structure when it moves vertically in an upward direction, thereby preventing excessive platform heave near resonance; and

    third means for deactivating said second means when said structure heaves down.

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