| 摘要 |
<p>Disclosed is a riser tower structure (112, 114) of a type comprising a plurality of elongate objects (200, 210). The riser tower structure is provided with blocks (220, 230), preferably of buoyant material,along at least part of its length, said blocks providing said riser tower with a substantially circular cross-sectional profile, wherein one or more strakes (250) are provided on the outside of said blocks. Said strakes in a main embodiment are helical. Also disclosed is a corresponding method of constructing such a riser tower structure.</p> |
