*WFOPTION, NAME=STRUCTURE_NAME

Data format:

A single line with a maximum of 17 values, as follows:

I1 IHY IMEM IDDL1 IDDL2 IDDL3 IDDL4 IDDL5 IDDL6 ALPHA IEFF2 NDTMEMORY IKM IQTF IDH IPC IPW

Status :

Optional

Purpose :

To define the parameters of a the dynamic analysis taking into account the coupling between the floater and the lines with wave loads

Restriction :

The STRUCTURE_NAME must have been previously analysed with DIODORE

Details :

Parameter	Description
DIODORE_STRUCTURE_NAME	DIODORE_STRUCTURE_NAME : name of one of the mecanical structure in the hydrodynamic analysis with DIODORE : 8 characters maximum without blank in the name
I1	I1=1 : the wave loads are taken into account in a linear way I1=0 : the wave loads are taken into account in a non linear way (features not valid in V2R0)
IHY	IHY= 0 : constant non linear hydrostatic matrix (option only) IHY= 1 : non-linear hydrostatic matrix taken into account (features not valid in V2R0)
IMEM	IMEM= 0 : no memory effect : constant wave damping matrix. IMEM= 1 : memory effect with convolution procedure (features not valid in V2R0)
IDDL(1)	IDDL(1)= 0 : the waves loads is calculated for the surge degree of freedom of the floater IDDL(1)= 1 : the wave loads is not taken into account for the surge degree of freedom of the floater
IDDL(2)	IDDL(2)= 0 : the waves loads is calculated for the sway degree of freedom of the floater IDDL(2)= 1 : the wave loads is not taken into account for the sway degree of freedom of the floater
IDDL(3)	IDDL(3)= 0 : the waves loads is calculated for the heave degree of freedom of the floater IDDL(3)= 1 :the wave loads is not taken into account for the heave degree of freedom of the floater
IDDL(4)	IDDL(4)= 0 : the waves loads is calculated for the roll degree of freedom of the floater IDDL(4)= 1 : the wave loads is not taken into account for the roll degree of freedom of the floater
IDDL(5)	IDDL(5)= 0 : the waves loads is calculated for the pitch degree of freedom of the floater IDDL(5)= 1 : the wave loads is not taken into account for the pitch degree of freedom of the floater
IDDL(6)	IDDL(6)= 0 : the waves loads is calculated for the yaw degree of freedom of the floater IDDL(6)= 1 : the wave loads is not taken into account for the yaw degree of freedom of the floater
ALPHA	ALPHA (Default = 1). This parameter is an option to determine the floater's position to be used for wave calculation: ALPHA=1 : The reference position for wave calculation is the floater's low frequency motion, the wave frequency being filtered ALPHA=0 : The reference position for wave calculation is instantaneous floater's position
IEFF2	IEFF2= 1 : The second order wave loads due to wave kinematics are taken into account. Otherwise (default) they are not taken into account.
NDTMEMORY	NDTMEMORY : At time t, the memory effect is integrated from to to t with to = MDTMEMORYdti, dti is the initial time step in DYNAMIC.
IKM	IKM = 0 if mooring line stiffness matrices not taken into account, 1 otherwise
IQTF	IQTF = 0 for Newman theory; 1 for full QTF
IDH	IDH = 0 if damping matrices in HDB ignored, 1 if taken into account, 2 if only WF matrices used
IPC	IPC = 0 if current polar coefficients in HDB ignored, 1 if taken into account
IPW	IPW = 0 if wind polar coefficients in HDB ignored, 1 if taken into account

Note

In this case the floating body needed hydrodynamic values are extracted from the DIODORE data base.