Once you have added the desired number of stringers, you can calculate the final shape of the stringers through the points. Each stringer will be generated as a smooth B-Spline curve which lies in the surface of the hull.
To calculate a stringer:
Ř Select the stringer
Ř Choose Calc Selected Stringer from the Stringer menu
To fit all of the stringers:
Ř Choose Calc All Stringers from the Stringer menu
The stringers you have generated will be displayed in the drawing windows. If you have specified a shape for the stringer, the plate shape of the web of the stringer will also be developed and displayed in the Part window. The height of the stringer is taken from the total height of the stringer shape you have selected. The stringer development is based on the height of the stringer shape you have specified.
Note : Stringer development orientation
The stringer development calculation does not take upstand orientation into account. This means that when a stringer has an upstand orientation that is different to the orientation of the stringer, this will not be taken into account during the development calculations. The Stringer orientation overrides the upstand orientation for development.
You can use the drop down menu at the top left of the Part window to choose which stringer to display.
The stringers generated will pass exactly through all of the points you have specified. The fitted curve is smoothed to ensure its longitudinal fairness and depending on the position of the stringer points you have entered.
The stringer curves can be copied, printed and plotted in the same way as the other contours. You can turn the display of these contours on and off with the Stringers check box using the Structure… command from the Display menu.
Note : warning – open stringer profile detected
When calculating a stringer a dialog may appear warning that an open stringer profile is detected. This means that the profile assigned to the stringer in the shapes library is not a closed contour. This means that it will not be able to calculate an enclosed volume for the weight of the stringer. If you wish to get an accurate weight for the stringer you will need to edit the shape of the stringer in the shape library (Window | Library) by ensuring the profile is a closed continuous contour.