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Importing hydrodynamic data: MOSES |
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Importing hydrodynamic data: MOSES |
OrcaFlex can import MOSES data in a straightforward way, with the following caveats:
See this example for MOSES displacement RAOs, and this one for MOSES wave load RAOs. Remember that RAO and phase origins are not imported from text files – you should take particular care with MOSES output to set these correctly, since in this case the RAO origin and phase origin may differ.
Newman QTFs in all six degrees of freedom are included in this example of MOSES output.
Added mass and damping may be output in two forms by MOSES:
MOSES will optionally output the full $6{\times}6$ matrices to a .ppo file, and this is the only format which is supported by OrcaFlex import. MOSES presents these matrices scaled by mass. Since OrcaFlex requires non-normalized data, the import process must account for this scaling factor. To do so, note that towards the beginning of this example is a section of the form
OrcaFlex Scaling Factor Start
1381.8
OrcaFlex Scaling Factor End
The number 1381.8 in this case is the mass of the vessel, as specified in the standard MOSES output file. OrcaFlex will scale all the imported data by this value.
| Warning: | You must ensure that your OrcaFlex model units are the same as the units of your MOSES added mass and damping data, including the unit of mass for the scaling factor, before importing the data. |
The standard MOSES output file may also contain tables of the diagonal elements (surge-surge, sway-sway, yaw-yaw etc terms only) of the added mass and damping matrices. OrcaFlex cannot however import these data directly, since the rotational components are presented as radii of gyration. If you wish to import these data, you will need first to convert the rotational values from radii of gyration to added inertia and rotational damping, according to the formulation used by MOSES.
Page 1 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- November 23, 2009 *
* Step 4 - Response Amplitude Operators *
* *
* Draft = 6.8 Feet Trim Angle = 0.03 Deg. GMT = 28.1 Feet *
* Roll Gy. Radius = 18.0 Feet Pitch Gy. Radius = 45.9 Feet Yaw Gy. Radius = 48.5 Feet *
* Heading = 90.00 Deg. Forward Speed = 0.00 Knots Linearization Based on 1/ 20 *
* *
***************************************************************************************************************
*** OrcaFlex Conventions Start ***
RAOResponseUnits = degrees
RAOWaveUnit = amplitude
RAOPhaseConvention = leads
RAOPhaseUnitsConvention = degrees
RAOPhaseRelativeToConvention = crest
SurgePositive = aft
SwayPositive = starboard
HeavePositive = up
RollPositiveStarboard = up
PitchPositiveBow = up
YawPositiveBow = port
*** OrcaFlex Conventions End ***
*** OrcaFlex Units Start ***
LengthUnits = ft
*** OrcaFlex Units End ***
+++ M O T I O N R E S P O N S E O P E R A T O R S +++
=========================================================
Results are in Body System
Of Point On Body CBRG180 At X = 90.0 Y = 0.0 Z = 7.0
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
E N C O U N T E R Surge / Sway / Heave / Roll / Pitch / Yaw /
-------------------- Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl.
Frequency Period /--------------/ /--------------/ /--------------/ /--------------/ /--------------/ /--------------/
-(Rad/Sec)- -(Sec)- Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase
*** OrcaFlex Displacement RAO Start ***
Draught "6.8'"
Direction 90
N/A WP XA XP YA YP ZA ZP RXA RXP RYA RYP RZA RZP
0.2513 25.00 0.007 97 0.973 93 0.985 0 0.110 89 0.027 174 0.002 96
1.2566 5.00 0.004 71 0.321 73 0.835 -22 5.104 26 0.073 68 0.010 -157
1.3963 4.50 0.003 31 0.259 140 0.625 -30 2.997 -10 0.066 36 0.006 157
1.5708 4.00 0.001 -43 0.309 156 0.367 -34 1.423 -17 0.041 10 0.003 132
2.0944 3.00 0.000 0 0.187 -143 0.067 27 0.259 35 0.009 49 0.001 98
*** OrcaFlex Displacement RAO End ***
Page 2 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- November 23, 2009 *
* Step 4 - Response Amplitude Operators *
* *
* Draft = 6.8 Feet Trim Angle = 0.03 Deg. GMT = 28.1 Feet *
* Roll Gy. Radius = 18.0 Feet Pitch Gy. Radius = 45.9 Feet Yaw Gy. Radius = 48.5 Feet *
* Heading = 135.00 Deg. Forward Speed = 0.00 Knots Linearization Based on 1/ 20 *
* *
***************************************************************************************************************
+++ M O T I O N R E S P O N S E O P E R A T O R S +++
=========================================================
Results are in Body System
Of Point On Body CBRG180 At X = 90.0 Y = 0.0 Z = 7.0
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
E N C O U N T E R Surge / Sway / Heave / Roll / Pitch / Yaw /
-------------------- Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl.
Frequency Period /--------------/ /--------------/ /--------------/ /--------------/ /--------------/ /--------------/
-(Rad/Sec)- -(Sec)- Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase
*** OrcaFlex Displacement RAO Start ***
Draught "6.8'"
Direction 135
N/A WP XA XP YA YP ZA ZP RXA RXP RYA RYP RZA RZP
0.2513 25.00 0.646 -97 0.696 83 0.983 -6 0.079 82 0.084 101 0.055 -6
1.2566 5.00 0.042 67 0.048 -39 0.030 -81 0.033 160 0.546 -114 0.313 -174
1.3963 4.50 0.061 -143 0.026 20 0.113 -87 0.381 -65 0.206 -161 0.170 145
1.5708 4.00 0.107 148 0.060 6 0.081 -131 0.222 -126 0.061 -57 0.009 -63
2.0944 3.00 0.049 91 0.017 -12 0.014 -133 0.038 -84 0.027 -73 0.015 -103
*** OrcaFlex Displacement RAO End ***
Page 3 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- November 23, 2009 *
* Step 4 - Response Amplitude Operators *
* *
* Draft = 6.8 Feet Trim Angle = 0.03 Deg. GMT = 28.1 Feet *
* Roll Gy. Radius = 18.0 Feet Pitch Gy. Radius = 45.9 Feet Yaw Gy. Radius = 48.5 Feet *
* Heading = 180.00 Deg. Forward Speed = 0.00 Knots Linearization Based on 1/ 20 *
* *
***************************************************************************************************************
+++ M O T I O N R E S P O N S E O P E R A T O R S +++
=========================================================
Results are in Body System
Of Point On Body CBRG180 At X = 90.0 Y = 0.0 Z = 7.0
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
E N C O U N T E R Surge / Sway / Heave / Roll / Pitch / Yaw /
-------------------- Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl.
Frequency Period /--------------/ /--------------/ /--------------/ /--------------/ /--------------/ /--------------/
-(Rad/Sec)- -(Sec)- Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase
*** OrcaFlex Displacement RAO Start ***
Draught "6.8'"
Direction 180
N/A WP XA XP YA YP ZA ZP RXA RXP RYA RYP RZA RZP
0.2513 25.00 0.911 -100 0.000 0 0.982 -9 0.000 0 0.115 93 0.000 0
1.2566 5.00 0.151 178 0.000 0 0.153 -109 0.000 0 0.032 170 0.000 0
1.3963 4.50 0.138 112 0.000 0 0.067 -149 0.000 0 0.177 -79 0.000 0
1.5708 4.00 0.008 -122 0.000 0 0.045 -96 0.000 0 0.116 -142 0.000 0
2.0944 3.00 0.046 47 0.000 0 0.024 -154 0.000 0 0.054 -111 0.000 0
*** OrcaFlex Displacement RAO End ***
Page 4 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- November 23, 2009 *
* Step 4 - Response Amplitude Operators *
* *
* *
***************************************************************************************************************
+++ I N D E X O F O U T P U T +++
=====================================
MOTION RESPONSE OPERATORS . . . . . . . . . . . . . . 1
INDEX OF OUTPUT . . . . . . . . . . . . . . . . . . . 4
*** OrcaFlex Conventions Start ***
RAOResponseUnits = degrees
RAOWaveUnit = amplitude
RAOPhaseConvention = leads
RAOPhaseUnitsConvention = degrees
RAOPhaseRelativeToConvention = crest
SurgePositive = aft
SwayPositive = starboard
HeavePositive = up
RollPositiveStarboard = up
PitchPositiveBow = up
YawPositiveBow = port
*** OrcaFlex Conventions End ***
*** OrcaFlex Units Start ***
LengthUnits = ft
ForceUnits = kpf
*** OrcaFlex Units End ***
[header page omitted for brevity]
Page 4 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- December 18, 2007 *
* test of 3d diffraction *
* *
***************************************************************************************************************
+++ P A N E L W A V E F R E Q U E N C Y F O R C E S F O R O C 9 1 +++
===============================================================================
Pressure Name = OC91 Heading = 90.00
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
E N C O U N T E R Surge Force / Sway Force / Heave Force / Roll Moment / Pitch Moment / Yaw Moment /
-------------------- Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl.
Frequency Period /--------------/ /--------------/ /--------------/ /--------------/ /--------------/ /--------------/
-(Rad/Sec)- -(Sec)- Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase
*** OrcaFlex Load RAO Start ***
Draught OC91
Direction 90
N/A WP XA XP YA YP ZA ZP RXA RXP RYA RYP RZA RZP
0.6283 10.00 0 0 25 -90 70 5 337 89 0 0 0 0
1.4784 4.25 0 0 48 -94 16 57 555 85 0 0 0 0
1.5708 4.00 0 0 43 -87 13 67 492 92 0 0 0 0
1.6755 3.75 0 0 38 -75 10 78 431 103 0 0 0 0
1.7952 3.50 0 0 35 -58 7 93 386 119 0 0 0 0
*** OrcaFlex Load RAO End ***
Page 5 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- December 18, 2007 *
* test of 3d diffraction *
* *
***************************************************************************************************************
+++ P A N E L W A V E F R E Q U E N C Y F O R C E S F O R O C 9 1 +++
===============================================================================
Pressure Name = OC91 Heading = 180.00
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
E N C O U N T E R Surge Force / Sway Force / Heave Force / Roll Moment / Pitch Moment / Yaw Moment /
-------------------- Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl.
Frequency Period /--------------/ /--------------/ /--------------/ /--------------/ /--------------/ /--------------/
-(Rad/Sec)- -(Sec)- Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase
*** OrcaFlex Load RAO Start ***
Draught OC91
Direction 180
N/A WP XA XP YA YP ZA ZP RXA RXP RYA RYP RZA RZP
0.6283 10.00 25 89 0 0 70 5 0 0 336 89 0 0
1.4784 4.25 48 85 0 0 16 57 0 0 554 85 0 0
1.5708 4.00 43 92 0 0 13 66 0 0 491 92 0 0
1.6755 3.75 38 104 0 0 10 78 0 0 430 103 0 0
1.7952 3.50 35 121 0 0 7 92 0 0 386 119 0 0
*** OrcaFlex Load RAO End ***
Page 6 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- December 18, 2007 *
* test of 3d diffraction *
* *
***************************************************************************************************************
+++ M E A N W A V E D R I F T F O R C E S F O R O C 9 1 +++
=====================================================================
Drift Name = OC91 Heading = 90.00 Computed by Salvesen
Motion Factor = 0.0000 Force Factor = 1.0000
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
Mean Drift Force ( With No Factor ) / (Wave Amplitude)**2
E N C O U N T E R T R A N S L A T I O N R O T A T I O N
-------------------- /-----------------------------/ /-----------------------------/
Frequency Period Surge Sway Heave Roll Pitch Yaw
*** OrcaFlex QTF Start ***
Draught OC91
Direction 90
N/A WP surge sway heave roll pitch yaw
0.6283 10.000 0.0 0.0 -0.3 0.5 0.0 0.0
1.4784 4.250 0.0 -1.0 0.4 8.0 0.0 0.0
1.5708 4.000 0.0 -1.2 0.4 10.0 0.0 0.0
1.6755 3.750 0.0 -1.3 0.3 11.0 0.0 0.0
1.7952 3.500 0.0 -1.3 0.2 11.6 0.0 0.0
*** OrcaFlex QTF End ***
Page 7 Licensee - Ultramarine, Inc Rev DEVLOP Ser201
***************************************************************************************************************
* *** MOSES *** *
* ---------------- December 18, 2007 *
* test of 3d diffraction *
* *
***************************************************************************************************************
+++ M E A N W A V E D R I F T F O R C E S F O R O C 9 1 +++
=====================================================================
Drift Name = OC91 Heading = 180.00 Computed by Salvesen
Motion Factor = 0.0000 Force Factor = 1.0000
Process is DEFAULT: Units Are Degrees, Feet, and Kips Unless Specified
Mean Drift Force ( With No Factor ) / (Wave Amplitude)**2
E N C O U N T E R T R A N S L A T I O N R O T A T I O N
-------------------- /-----------------------------/ /-----------------------------/
Frequency Period Surge Sway Heave Roll Pitch Yaw
*** OrcaFlex QTF Start ***
Draught OC91
Direction 180
N/A WP surge sway heave roll pitch yaw
0.6283 10.000 0.0 0.0 -0.3 0.0 0.5 0.0
1.4784 4.250 1.0 0.0 0.4 0.0 8.0 0.0
1.5708 4.000 1.2 0.0 0.4 0.0 10.0 0.0
1.6755 3.750 1.3 0.0 0.3 0.0 11.0 0.0
1.7952 3.500 1.3 0.0 0.2 0.0 11.6 0.0
*** OrcaFlex QTF End ***
For demonstration purposes, the data for period 10 seconds have not been marked for import in this example. You can see what text has been added to the data for periods 25 and 3 seconds.
$ MATRICES
$ Dimensions are Meters and M-Tons
*** OrcaFlex Scaling Factor Start ***
1381.8
*** OrcaFlex Scaling Factor End ***
*** OrcaFlex Conventions Start ***
SurgePositive = aft
SwayPositive = starboard
HeavePositive = up
RollPositiveStarboard = up
PitchPositiveBow = up
YawPositiveBow = port
*** OrcaFlex Conventions End ***
Frequency 0.2513 Period 25.0000
Added Mass
*** OrcaFlex Added Mass Matrix Start ***
Draught AnotherDraught
WP 25
7.27419E-02 -1.03859E-08 -4.62948E-02 1.69317E-06 2.74299E+00 9.91199E-07
7.98527E-09 4.70212E-01 -8.07100E-07 -4.60229E+00 -1.13847E-04 3.01228E+01
-4.62948E-02 1.07046E-06 4.72563E+00 -1.69966E-04 -2.75714E+02 -9.96570E-05
1.69317E-06 -4.60229E+00 -1.69966E-04 1.37442E+02 1.85538E-02 -2.93111E+02
2.74299E+00 -1.13847E-04 -2.75714E+02 -1.33822E-02 1.99124E+04 -1.25064E-02
9.91199E-07 3.01228E+01 -9.96570E-05 -2.93737E+02 1.10314E-02 2.33744E+03
*** OrcaFlex Added Mass Matrix End ***
Damping
*** OrcaFlex Damping Matrix Start ***
Draught AnotherDraught
WP 25
1.13931E-04 3.18018E-10 -1.14519E-02 -2.22923E-09 6.72508E-01 -1.91657E-08
-5.18165E-10 2.93072E-03 5.20776E-08 -4.37366E-02 4.06262E-06 1.90861E-01
-1.14519E-02 -3.48886E-08 1.15109E+00 2.24026E-07 -6.75975E+01 1.92522E-06
-2.22923E-09 -4.37366E-02 2.24026E-07 6.89538E-01 -1.51774E-05 -2.81241E+00
6.72508E-01 4.06262E-06 -6.75975E+01 5.72135E-04 4.91463E+03 4.37046E-04
-1.91657E-08 1.90861E-01 1.92522E-06 -2.86780E+00 -1.45733E-04 1.49420E+01
*** OrcaFlex Damping Matrix End ***
Frequency 0.3142 Period 10.0000
Added Mass
7.26575E-02 -1.05154E-08 -3.88891E-02 1.63635E-06 2.30748E+00 1.29998E-06
1.16511E-08 4.95352E-01 -1.16804E-06 -4.90549E+00 -1.11450E-04 3.17468E+01
-3.81700E-02 1.07480E-06 3.98124E+00 -1.64680E-04 -2.31938E+02 -1.30483E-04
1.63635E-06 -4.90549E+00 -1.64680E-04 1.41316E+02 1.78915E-02 -3.12508E+02
2.30748E+00 -1.11450E-04 -2.31938E+02 -1.25740E-02 1.67264E+04 -1.22910E-02
1.29998E-06 3.17468E+01 -1.30483E-04 -3.13248E+02 1.43120E-02 2.46384E+03
Damping
1.26489E-04 6.23468E-10 -1.27141E-02 -2.37699E-09 7.45921E-01 -1.14327E-08
-2.04045E-10 8.85484E-03 2.04453E-08 -1.29779E-01 7.07358E-06 5.76860E-01
-1.27141E-02 -6.25750E-08 1.27796E+00 2.39656E-07 -7.49767E+01 1.13285E-06
-2.37699E-09 -1.29779E-01 2.39656E-07 2.00759E+00 -3.17400E-05 -8.34787E+00
7.45921E-01 7.07358E-06 -7.49767E+01 1.03390E-03 5.44731E+03 7.49781E-04
-1.14327E-08 5.76860E-01 1.13285E-06 -8.50670E+00 -6.30361E-05 4.51613E+01
Frequency 2.0944 Period 3.0000
Added Mass
*** OrcaFlex Added Mass Matrix Start ***
Draught AnotherDraught
WP 3
6.93807E-02 -1.38449E-08 -2.92718E-02 -3.86817E-06 1.76513E+00 1.71664E-06
1.72638E-08 2.82871E-02 -1.73413E-06 -6.25036E-02 -1.44301E-04 1.94354E+00
-8.70653E-03 1.38723E-06 3.01157E+00 3.88882E-04 -1.77423E+02 -1.72574E-04
-3.86817E-06 -6.25036E-02 3.88882E-04 8.84137E+01 -4.24594E-02 -8.32917E+00
1.76513E+00 -1.44301E-04 -1.77423E+02 1.03461E-01 1.28932E+04 -1.43709E-02
1.71664E-06 1.94354E+00 -1.72574E-04 -1.42196E+01 1.88896E-02 1.55396E+02
*** OrcaFlex Added Mass Matrix End ***
Damping
*** OrcaFlex Damping Matrix Start ***
Draught AnotherDraught
WP 3
7.10863E-07 8.57925E-08 -7.14528E-05 -1.19046E-06 -1.34968E-03 1.39262E-05
1.26454E-07 2.24899E-01 -1.27109E-05 -8.88217E-01 9.38920E-04 1.44738E+01
-7.14538E-05 -8.61165E-06 7.18222E-03 1.19672E-04 1.35664E-01 -1.39975E-03
-1.19046E-06 -8.88217E-01 1.19672E-04 -4.46140E-01 -1.31348E-02 -6.04964E+01
-1.34968E-03 9.38920E-04 1.35664E-01 1.31833E-02 -4.90675E+01 1.02491E-01
1.39262E-05 1.44738E+01 -1.39975E-03 -7.48632E+01 1.53212E-01 1.10320E+03
*** OrcaFlex Damping Matrix End ***
[Remaining data removed for brevity]