| 摘要 |
The invention relates to a rotatable fairing ( 1 ) for a marine riser ( 2 ) or other slender marine structure. The fairing ( 1 ) is arranged on the riser for reducing watercurrent-induced stresses on said riser ( 2 ), said fairing ( 1 ) having a tail portion ( 3 ) for trailing generally in the downstream direction behind said riser. The fairing ( 1 ) is provided with an attenuation unit ( 8 ) for counteracting the unstable rotation of said fairing ( 2 ) relative to said riser ( 2 ), in order to prevent undesired vibrations of said riser ( 2 ). The fairing is provided with one or more clamps ( 10 ) for attachment to and around a periphery of said riser ( 2 ), said clamps ( 10 ) arranged with a gear rim ( 12 ) for engagement with an actuating cogged wheel ( 14 ) of said attenuation unit ( 8 ).
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