Hydraulic and earth engineering – Marine structure or fabrication thereof – Structure protection
Reexamination Certificate
2005-09-27
2005-09-27
Singh, Sunil (Department: 3673)
Hydraulic and earth engineering
Marine structure or fabrication thereof
Structure protection
C405S211000
Reexamination Certificate
active
06948884
ABSTRACT:
A mechanism to be applied to an exterior surface of a cylindrical structure for the reduction of the effect of Vortex Induced Vibration (VIV) in the cylindrical structure when immersed in flowing fluid, wherein the mechanism includes a generally cylindrical column having a central axis, an interior surface corresponding in size and shape to the exterior surface of the cylindrical structure to which the mechanism is to be applied and an outer surface defining a wall thickness. A reduced wall thickness is formed into the outer surface in a pattern to produce a discontinuity that interrupts the lengthwise coherence of vortex shedding of moving fluid from the outer surface when the cylindrical column is attached to the exterior of the cylindrical structure in the flowing fluid. The effect of VIV on the cylindrical structure is effectively reduced. The result is a submergible cylindrical assembly for positioning in a flowing body of water and having enhanced resistance to VIV.
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Measamer Jeffery C.
Qi Tao
Xu Qi
Klein Howard J.
Klein O'Neill & Singh, LLP
Singh Sunil
Technip France
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