vamseeachanta Deck 0 — Job Control (mandatory for all runs) (+3)
Deck 0 — Job Control (mandatory for all runs)
SYSTEM DATA AREA 50000 ! Scratch memory allocation (bytes)
JOB analysis LINE ! <jobname> <program_code>
TITLE FPSO Diffraction Analysis 2026
NUM_CORES 8 ! OpenMP threads (base licence: max 4 free)
OPTIONS REST AHD1 END ! REST=restart capable; AHD1=write ASCII .AH1
RESTART 1 1 ! Start stage, stop stage (1=LINE, 2=LIBR, 3=NAUT)
Common OPTIONS flags:
| Flag | Effect |
|---|---|
REST |
Enable restart capability (writes .RES) |
AHD1 |
Write ASCII hydrodynamic database (.AH1) for OrcaFlex import |
GOON |
Continue past non-fatal errors |
NOFIG |
Suppress figure output |
NOLIST |
Suppress listing output |
Deck Structure (Categories 1–6 for AQWA-LINE)
| Category | Keyword | Purpose |
|---|---|---|
| 0 | (top of file) | Job control (JOB, TITLE, NUM_CORES, OPTIONS, RESTART) |
| 1 | COOR |
Node coordinates: ID X Y Z |
| 2 | QPPL / TPPL |
Element topology: quad/tri panel connectivity |
| 3 | PMAS |
Mass properties |
| 4 | GEOM |
Geometric properties / CoG / inertia |
| 5 | GLOB |
Global environment (DPTH, DENS, ACCG) |
| 6 | FREQ / DIRN |
Wave frequencies and directions |
| — | STOP |
Terminates entire input file |
Minimal AQWA-LINE DAT Template
SYSTEM DATA AREA 50000
JOB fpso LINE
TITLE FPSO Hydrodynamic Diffraction
NUM_CORES 8
OPTIONS REST AHD1 END
RESTART 1 1
COOR
1001 0.0 0.0 0.0
1002 50.0 0.0 0.0
1003 50.0 15.0 0.0
1004 0.0 15.0 0.0
END
QPPL
QPPL DIFF
1001 1001 1002 1003 1004
END
PMAS
...
END
GEOM
...
END
GLOB
DPTH 200.0
DENS 1025.0
ACCG 9.81
END
FREQ
0.2 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.5 2.0
END
DIRN
0.0 45.0 90.0 135.0 180.0
END
STOP
Critical DAT Conventions
| Convention | Detail |
|---|---|
QPPL DIFF |
Omitting DIFF makes panels non-diffracting — no error, wrong results |
ILID AUTO 21 |
Irregular frequency removal; add after ZLWL waterline card |
SEAG nx ny |
2 params in standalone mode; 6-param form is Workbench-only |
OPTIONS GOON |
Overrides non-fatal errors; does NOT bypass FATAL mesh errors |
| 80-col limit | Strictly enforced — AQWA truncates silently at column 80 |
STOP vs END |
STOP terminates the whole file; END terminates each category |