ansys aqwa (overview)
DESCRIPTION
hydrodynamic diffraction AnalysisTRANSCRIPT
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 analysisdiffraction analysis
HYDROSTATIC
HYDRODYNAMIC
PRESSURE
MOTIONS (6DOF)
HOW?
MODEL ANSYS DESIGN MODELER
MAXSURF
AUTO CAD
INPUTVCG
RADIUS OF GYRATION
WAVE
MESH
RESULT HYDROSTATICStructure
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:
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
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):
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
DIFFRACTIONDIFFRACTION
RADIATION DAMPING
RAO (RESPON AMPLITUDE OPERATION)
ADDED MASS
STEADY DRIFT
RESULT PRESSURE & MOTION
RESULT PRESSURE & MOTION
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