Based on Ocean System's proven Vessel Optimization
and Safety System (VOSS)
and Oceanweather's 30+ year global wind and wave hindcast
(GROW), TOWSIM is a tool to
develop Trans-Ocean Criteria for transporting offshore
structure on a barge, towing an FPSO, drill ship and
other floating vessel.
- Custom
tailored modeling of the barge or self propelled ship
are used to predict vessel speed performance and motion
responses in wind and waves.
- 20
years of validated Global wind and wave hindcast database
including tropical cyclones.
- Detailed
wind, sea and swells information on a 0.625 by 1.25
degrees latitude and longitude grid.
- Simulates
user specified route with departures every 6/12/24/48
hours. Monthly statistics are compiled up to 20 years.
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User friendly graphical interface under the Microsoft
Windows 95/98/NT/2000 operating systems with batch
mode processing to run 20 years of simulation or for
selected months/years, thus allowing the user to quickly
answer many "what if" questions during criteria
development.
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Monthly
Exceedance and PDF
Maximum
Vessel motion responses, encountered environmental
conditions, trip duration etc. for each simulated
passage are saved and compiled to show statistics:·
- Monthly
Exceedance and Probability Densities are plotted on
a log scale from 100% to 0.1%.
- Number
of samples, probability density, cumulative and exceedance
probabilities are presented in tabular format.
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Both plots and tables are saved on disk and can be
printed or included in a report.
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Scatter
Diagrams and Spectra
Enroute
conditions such as wind speed, direction, sea, swells
height period and direction, vessel pitch, roll angles,
vertical, lateral accelerations on 6 hourly intervals
for each simulated passage are also saved and compiled
to show statistics:
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Monthly Wind Speed vs Wind Direction, Wind Speed vs
Significant Wave Height (Hs), Roll vs Pitch angles,
Vertical vs Lateral Accelerations, Hs vs Peak period
are plotted as scatter diagrams.
- Joint
probabilities and total number of samples are presented
in tabular format.
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Unique mean directional wave spectra grouped within
1 meter interval of significant wave heights are compiled
from sea and swell parameters and shown by 3-D plots
as well as 2-D wave energy tables. This is particularly
useful for fatigue and long term response predictions
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Both plots and tables are saved on disk and can be
printed or included in a report.
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