Shell Expansion

Purpose:

To create traditional shell expansion drawings or an additional view for modelling work.

Prerequisites:

There must exist a current drawing.

Instructions:

The view is created with plate thickness, quality and position number annotated on each plate. Furthermore, each plate is drawn with a hatch pattern chosen to display the plate thickness that is used.

You can control the visibility of this information in two ways:

By using the function Symbolic View>Curved Hull View>Properties and picking a shell expansion view. you will get the possibility to display or hide the plate information. Furthermore, if plate hatching is chosen to be shown, an accompanying legend can also be created that shows each used hatch pattern and the thickness it represents.

The shell expansion view is initially presented with shown information controlled by default parameters as below.

Options:

Default parameters used:

• NOLONGNO when given, no longitudinal names are drawn,

• SHX_LNO_DIST specifies the minimum distance between longitudinal names,

• SHX_PARTITION the distance between development curves,

• SHX_ENDCUT_SYMB when given, end cut symbols will be drawn at the ends of shell profiles,

• SHX_BUTTS_OVER_CL when given, the SB/PS part of butts over CL with the longest extension will be drawn.

• SHX_DRAW_PLATES, default setting for display of plate thickness, when set to TEXT plate thickness will be annotated, when set to DRAW thicknesses will be illustrated by hatch patterns, when NOT SET the information will be hidden

• SHX_SHOW_POSNO, default setting for display of position number, when given, plates are shown with position number annotated, when NOT SET the information will be hidden

• SHX_SHOW_MATQ, default setting for display of material quality, when given, plates are shown with material quality annotated, when NOT SET the information will be hidden

Result:

A shell expansion drawing is produced and placed interactively. Modelling work can be performed in the shell expansion view. When an object is created/modified the shell expansion view will be updated in the same way as any other type of view. To get the best result in the fore and aft of the ship, the shell expansion might have to be partitioned into smaller parts in these regions.