Section Modulus

Purpose:

To calculate the total area, height of the neutral axis, moment of inertia and the section modulus at the keel and deck for a cross- section of the ship at a given position along the X-axis of the ship.

Prerequisites:

A cross-section view at the desired position must exist.

Instructions:

All hull items involved in the calculations are collected using an indicate cross-section view. Once the collection is made, all basic data are presented in a dialog and the user is allowed to define factors on individual items that should not be considered fully. When the OK button leaves the collection dialog, the results are presented.

Options:

The involved items are presented in dialogs and lists with their AVEVA Marine name. The Functional Description on panel level can be selected to be presented instead (if existing). This option is selected by setting the logical SBH_SECMOD_FD to any value.

The resulting CSV files are named as specified below using a running number.The running number is by default locally initialized to 1 at the start of a session and resulting files will get running numbers 1, 2 Global running numbers can be selected instead, giving a resulting files a unique 6-digit number within a project. An ASCII file assigned to the logical variable SBH_SECMOD_NAMES controls the global running numbers. The setup of this file is described in Manufacturing / Production Program Interface / Automatic Naming of Drawings.

Result:

The calculated values for the complete collection of items are presented in the drawing. The neutral axis is draw together with calculated data and the information can be shown or hidden using the function Planar > View > Properties.

If the user has changed any factors for individual items, this information is stored with the selected view (in the drawing) and these values are used the next time a Section Modulus calculation is made on this view.

The set of data and all calculations are presented in a CSV file accessible via the Log Viewer. The names of the resulting CSV files are SEC_MOD_<X-position>_<running number>.csv, for example, if calculations are made on a view in FR54 the resulting file name may become SEC_MOD_FR54_1.csv. All resulting files will be placed on the directory assigned to the logical SB_SHIPPRINT.