*DIPOLE

Data format:

One line with 1 parameter, as follows:

ISTEPDIPOL

Status:

Optional (Quasi-Static)

Purpose:

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

Restriction:

Only available for quasi-static analyses.

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

If DIPOLE is used, WAKE must be used and ISTEPDIPOL must be greater (or equal) than ISTEPSILL

Details :

Parameter	Description
ISTEPDIPOL	Quasi-static step from which the dipole flow must be calculated

Note

Ref. 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 loading

Example:

*DIPOLE
5

After five quasi-static steps of calculations, the dipole flow is taken into account