*LF_FPFDX

Data format:

One line comprising 2 values followed by NPER_LF lines comprising 13 values each :

ITOP0 NPER_LF
PERIOD(1) AX FIX AY FIY AZ FIZ ARX FIRX ARY FIRY ARZ FIRZ
...
PERIOD(n) AX FIX AY FIY AZ FIZ ARX FIRX ARY FIRY ARZ FIRZ

Purpose : to define the Low Frequencies (LF) motions of a floating unit as a series of periodic movements.

Status :

Optional

Restriction :

A *FPFDX keyword must have been previolsy defined

Details :

Parameter	Description
ITOP0	Node declared as the center of motions of a FPF, previously defined with the keyword *FPFDX.
NPER_LF	number of periods defining the LF motions
PERIOD()	periods at which the LF motions of the FPF is defined
AX AY AZ	amplitudes of the LF translations in the global reference at the corresponding PERIOD in meters
ARX ARY ARZ	amplitudes of the LF rotations in the global reference at the corresponding PERIOD in degrees
FIX FIY FIZ FIRX FIRY FIRZ	corresponding phase angles (degrees)

Note

The FPF must have been previously defined using the keyword FPFDX The LF motions is added to the wave frequencies (WF) motions given by the RAO. The LF displacements are taken into account for the calculation of the WF motions. In case of irregular wave (see WAVJON), the LF motions are integrated when looking for the requested ratio Hm/Hs.