*WAKE

Data format:

A line with one value

ISTEPSILL

Status :

Optional (Quasi-Static)

Purpose :

To take into account the wake flow generated by a cylinder in a current and its effect on other cylinders.

All the cylinders must have been previously defined with RISER or MOORLINE commands

Restriction :

Only available for quasi-static analyses

Details :

Parameter	Description
ISTEPSILL	Quasi-static step from which the wake
flow must be calculated

Note : Reference: "Current force on individual elements of riser arrays" HUSE, Marintek, Norway, C5-83 ISOPE June 1992

It is recommended to use several steps when putting on a current load

Example :

*WAKE
2

After two quasi-static steps of calculations, the wake effects is taken into account