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ANSYS AQWA - HYDRODYNAMIC DIFFRACTION
SOFTWARE OVERVIEW
LABORATORY OF OPERATIONAL RESEARCH AND DESIGN
ITS – SURABAYA
NOVEMBER 18, 2011
Supported by HIMATEKLA ITS Surabaya
SUBJECT RELATED
• HYDRODINAMIC
• FLOATING STRUCTURE MANUVERING
• THEORY OF FLOATING STRUCTURE I & II
• FINITE ELEMENT METHOD
• DESIGN OF OFFSHORE STRUCTURE
WHAT?
• ANSYS HYDRODYNAMIC DIFFRACTION (AQWA) is used for generating the fundamental hydrodynamic parameters required for undertaking complex motions and response simulations using three dimensional wave radiation and diffraction analysis
HYDROSTATIC
HYDRODYNAMIC
PRESSURE
MOTIONS (6DOF)
HOW?
MODEL ANSYS DESIGN MODELER
MAXSURF
AUTO CAD
INPUT VCG
RADIUS OF GYRATION
WAVE
MESH
RESULT HYDROSTATIC Structure
Hydrostatic Stiffness
Centre of Gravity Position: X: Y: Z:
Z RX RY
Heave(Z):
Roll(RX):
Pitch(RZ):
Hydrostatic Displacement Properties
Actual Volumetric Displacement:
Equivalent Volumetric Displacement:
Centre of Buoyancy Position: X: Y: Z:
Out of Balance Forces/Weight: FX: FY: FZ:
Out of Balance Moments/Weight: MX: MY: MZ:
Cut Water Plane Properties
Cut Water Plane Area:
Centre of Floatation: X: Y:
Principal 2nd Moment of Area: X: Y:
Angle Principal Axis makes with X(FRA):
Small Angle Stability Parameters
C.O.G. to C.O.B.(BG):
Metacentric Heights (GMX/GMY):
COB to Metacentre (BMX/BMY):
Restoring Moments/Degree Rotations (MX/MY):
BargeHull
AQWA Hydrostatic Results
Barg
42.661087 m 1.0559e-3 m 1.6299999 m
18806488 N -295.53528 N 870.57214 N
-16932.924 N 14895992 N -9926.7363 N
49880.109 N -9926.7363 N 1.59532e8 N
3025.8057 m
3025.8057 m
42.66111 m 1.0568e-3 m -0.8640771 m
5.137e-10 1.0628e-8 -3.2879e-7
8.0399e-7 m -2.2921e-5 m 2.331e-8 m
1870.9541 m
42.658436 m 1.5552e-4 m
92454.383 m 916887.88 m
-0.225289 °
2.494077 m
28.061216 m 300.52866 m
30.555294 m 303.02274 m
259984.11 N 2784365. N
RESULT HYDRODYNAMIC
DIFFRACTION + FROUDE-KRYLOV
FROUDE - KRYLOV
DIFFRACTION
RADIATION DAMPING
RAO (RESPON AMPLITUDE OPERATION)
ADDED MASS
STEADY DRIFT
RESULT PRESSURE & MOTION
RESULT PRESSURE & MOTION
“ALL FOR ONE, ONE FOR ALL” THANK YOU
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