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*FREQHDB, REFERENCE, NAME=STRUCTURE_NAME

*FREQHDB, NAME=STRUCTURE_NAME

*FREQHDB

Data cards :

A single if used with NAME=STRUCTURE_NAME

IOP

Two lines if used as *FREQHDB with no other option

INO
IOP

Status :

Optional

Purpose :

To generate motion RAOs from a frequency domain analysis. A file HDB_STRUCTURE_NAME.dat is created (if a structure name is provided) or HDB_INO.dat (INO: node number) otherwise. The file contains amplitude and phase RAOS:

[INCIDENCE_RAO_MOD_001]
..
[INCIDENCE_RAO_PH_001]
..

Restriction :

  • The STRUCTURE_NAME must be defined in the analysis
  • Only one floater per analysis can be defined as a reference
  • A wave must be defined

Details :

  • If REFERENCE is used in the keyword, the wave direction is considered with respect to the floater's direction. A 90° wave will then by considered coming from the side of the floater
  • REFERENCE can only be used with NAME=STRUCTURE_NAME
  • if REFERENCE, the wave direction is defined with respect to global X-axis
  • if NAME=STRUCTURE_NAME is not present, then a node number must be provided
Parameter Description
STRUCTURE_NAME name of one of the mechanical structure in the hydrodynamic analysis with DIODORE : 8 characters maximum without blank in the name
INO Node number
IOP = 0 : Phase based on DeepLines' option
= 1 : Phase based on Diodore's option