OrcaFlex Manual - Orcina

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System Modelling: Data and Results, Vessels
The Azimuths table determines which directions are to be analysed. The Offsets table specifies how far in the given
direction the vessel is to be placed. With the above data, the offsets analysed by the multiple statics calculation are
as illustrated by the dots in the diagram below:
180 deg
135 deg
Figure: Example Offsets
90 deg
45 deg
0 deg
0m 20m 40m 60m 80m 100m
Vessel Initial
Position
A diagram showing the selected offsets is drawn on the Vessel Offsets data form, to help visualise which offsets will
be analysed.
Drawing
Vessels are drawn as wire frames defined in the data as a set of Vertices and Edges. The Vertices are defined by
giving their coordinates relative to the vessel axes Vxyz. The Edges are lines drawn between two vertices.
For shaded graphics views, by default, the vessel is drawn using a solid, filled-in shape based on the vertices and
edges. As an alternative you can use the vertices and edges to define a frame like structure. If the edge diameter is
'~' then that edge will be used to build a filled in shape, otherwise that edge is drawn as a cylinder with the specified
diameter. Note that you can use a mixture of edge diameters (some defined, some set to '~') to combine both filled
in and framework shapes.
You can define wire frame drawing data in two places – for the vessel and also for its vessel type. The vessel is
drawn by first drawing a wire frame based on the vertices, edges and pen specified for its vessel type (see the vessel
types data form). Then a further vessel-specific wire frame may be drawn, using any vertices, edges and pen that
you specify on the vessel's data form.
This allows you to specify a wire frame drawing of the basic vessel type, and then optionally add to it (possibly in a
different colour) a wire frame drawing of some equipment that is specific to that vessel. If the vessel length differs
Y
X