||This task explains how to create
a stiffener using a curve as a support.
The technique used here requires you to
draw a spline on the surface, and create the stiffener using it. You can
also use a line as long as it is placed on the surface. The result shown
here was produced using the Generative Shape Design (GSD) application.
However, you can use other methods. To use GSD, you need to see
documentation for that product. However, certain general principles are
|| In this example, the user wanted
to create a stiffener located at a certain distance below the top edge
of the hull - say 10 meters.
Using GSD, the user:
- Created a series of curves on the hull. NOTE: When you are creating
a spline, it is recommended that you select the hull as the support, not
the shell plate, in case the hull design changes later in the design
- Created points on the curves, located at 10 meters from the top edge
of the hull.
- Created a spline that follows the points. The image below shows the
curves, with points placed on them. The hull has been hidden.
||After you have created the spline,
open the Object Design workbench. Select the hull
and click the Stiffener button. The Stiffener dialog box displays.
||Make the appropriate selection in
the Category field, in this case Shell Side Longitudinal
||Select the shell plate in the
||Select the spline in the
||Make your selections in the other
fields as described in Creating a Deck
Longitudinal Stiffener or Creating a Deck Transverse
NOTE: Although the Offset and Angle
fields are available when creating a stiffener on a curve, neither
affects the result. A stiffener on a curve is always created
with an Offset of 0, and the angle is always Normal to Plate
regardless of what the dialog box displays. When creating more than one
stiffener at a time, if you select a mix of curve and plane for supports,
the Offset and Angle fields are available, but
ignored for stiffeners on a curve. If the Offset is changed
to a non-zero value on a stiffener on a curve during edition, the
operation will be ignored, and a warning is shown.
||Click OK to create the
stiffener. The image below shows a section of the hull with the
stiffener placed on it. The hull has been angled to allow you to see the
curvature of the stiffener.
The image below shows two stiffeners placed on a hull.