Current design practice is to use Morison's equation for the prediction of forces on nominally rigid tubular members of offshore structures and to assume that vortex shedding induced transverse forces are not sufficiently coherent over the whole span of a tubular to warrant separate attention. Recent experiments on marine and artifically roughened cylinders show large vortex shedding induced lift forces which have a hight degree of spanwise coherence. The paper shows, through a case study, that in some circumstances the combination of the inline force and the lift force produces a resultant much larger than the Morison force above and an even greater increase in cumulative fatigue damage.
|Title of host publication||Proceedings of the First International Offshore and Polar Engineering Conference|
|Number of pages||8|
|Publication status||Published - 1991|
|Event||1st International Offshore and Polar Engineering Conference 1991 - Edinburgh, Scotl|
Duration: 11 Aug 1991 → 16 Aug 1991
|Conference||1st International Offshore and Polar Engineering Conference 1991|
|Period||11/08/91 → 16/08/91|