SDC Verifier

Tools

The following tools are available:

Export Model to File - creates text file with materials, properties, nodes and elements ids without the model data. The file is used to debug user problems without having the customer model.

Free Edge

Free Edge Tool automatically finds free edges between the elements.

To run Free Edge execute Tools - Free Edge from the main menu. Alternatively, use the Tools context menu.

Free Edge tool:

Press Find and the table will be filled with the groups of elements that has Free Edges.

Press All to select all groups from the list and None - to deselect;

Press to display only groups of elements.

Press to highlight the selected groups of elements.

- export selected groups to Femap;

- export selected groups to components;

Mass and COG Table

Mass and Center of Gravity Table is used to automatically calculate mass and center of gravity characteristics on the user-defined selections.

To add Mass and Center of Gravity click Tools - Mass and Center of Gravity - Add in the main menu.

Selection - elements that will be intersected with the selections defined below;

Elements Count - first value is amount of elements that were found on Selection. Second value is total amount of elements that exist in the model;

COG X, Y, Z - coordinates of the center of gravity;

Mass - mass of the selection.

Note: Overall row is Mass of all selections.

Selections can be defined using Entity List Selector.

Moment Shear Force

In order to check the validity of a ship Moment Shear Force can be performed.

Type = Moment Force.

The Horizontal Axis should be along the length of the model. Model Length is defined automatically = Maximum - Minimum along the Horizontal axis. Portside Axis - the vertical Axis.

Model Length is divided by steps in a number of the location where Forces and Moments will be calculated (N = Moment Length / Step). The Forces and moments will be calculated for the vertical level defined in the Z Level field in every point.

Forces are calculated:

Moments are calculated:

where AF is the applied force, RF - reaction force, MF - multi force, AM - applied moment, RM - reaction moment, MM - multi moment in the node, Z - Z level.

Press to display the plot.

Press to display the table:

Thickness Plot

Thickness plot is created to display plate elements thicknesses for flat elements selections like frames, decks and longitudinals in Femap.

It displays a nice plot with the properties thicknesses using the text labels. Rthe position of a label is calculated to be on the top elements with the same property:

To add a single Thickness Plot click Tools - Thickness Plots - Add in the tree.

Flat selections (as frames) are recommended to be used for thickness plots. The selection can be defined in 3 ways:

- select a frame/longitudinal/deck from the panel finder;

- select a group;

- define any custom selection using Selector Control.

It is required to select the View for the plot. It can be chosen from the list or imported from the Femap active view. To edit selected view options press .

Font Size can be set from 8pt to 32pt. By default 8pt size is used.

In most cases the default value of an Angle should be used. Only in case when the selection is quite curved or for hull, it should be increased. If too many labels are displayed on the area with the elements of the same property, increase the Angle option. For a hull 30 degrees are recommended.

Four types of data can be displayed on the labels: plate thickness; property ID; ID and Title; ID, Title and Thickness:

Press to display a plot.

It is also possible to create thickness plots for all frames/longitudinals/decks at once. Execute Tools - Thickness Plots - Create Multiple in the main menu. Alternatively use the Thickness Plot context menu.

In the Create Multiple Thickness Plots dialog instead of one selection, few can be defined using Selection List Control. As a result, few plots are created:

Created plots can be added in the report from the toolbox.

Moment Ratio

Moment Ratio calculates a moment ratio on the ends of a member found by the Beam Member Finder.

It is used in the moment reduction factors calculations in the following standards: API 2A RP (table D.3-1), ISO 19902 (table 13.5-1) and Norsok N004 (table 6-2):

And moment reduction factors according to Eurocode3 (table 6.6):

Cb (Aisc2010) lateral-torsional buckling modification factor for AISC360-10 is calculated for the Moment Ratio Torsional Y and Z:

Cb lateral-torsional buckling modification factor for AISC ASD 89 (Section F1.3) is calculated for Moment Ratio Torsional Y and Z:

To display the Moment Ratio execute from the context menu Edit.

The following dialog will be displayed:

M1(end min) and M2(end max) - the bending moment on the ends of the beam member.

M1/M2 - the moment ratio between the ends of the beam member..

Min/Max - the minimum/maximum bending moment over the full member.

Kc - the reduction factor according to Eurocode3, Part 1-1 Table 6.6.

Cb(Aisc89) - the lateral-torsional buckling modification factor according to AISC ASD 89.

Cb(Aisc2010) - the lateral-torsional buckling modification factor according to AISC360-10.

Select Load using Selector Control.

- plot moment ratios (M1/M2) for the selected members;

- plot ids for the selected members;

- plot Cm Type for the selected members. Cm type can be changed in Beam Member Finder:

- plot Kc factor;

- plot Cb factor for AISC ASD 89 or AISC 360-10;

- highlight the selected beam members;

- preview only selected beam members.

For the selected member the bending moment diagram is displayed. End moments, Min/Max over the full member are shown with labels:

Example: Calculation of the reduction moment factors Cm according to ISO 19902:

Weld Summation Tool

Weld Summation tool is used to summarize Grid Point Forces over welds. The results of the tool are used in Weld Checks.

Select Load and press Fill Table to display force summation for all welded parts.

To display force/moment define direction in Plot group box and press Plot.

- highlight selected weld parts;

- preview selected weld parts;

- display colored weld plot with weld ids as labels;

- detailed information about single weld part, including results for each element/node.

- display forces as labels for selected weld parts;

- display moments as labels for selected weld parts;

Forces are summarized over the weld nodes (41 - 47) using elements only from the respective weld part (101 - 126).

Weld Stresses

Stresses due to forces are calculated using the weld area, and due to moments using the inertia of the full weld.

Note: Weld inertia is calculated assuming that effective weld section is horizontal and weld is double-symmetric.

Stresses are rotated into weld X, Y and XY directions and translated to points on the weld face at the each end of the weld (T1, T2, B1 and B2).

Following matrix of rotation is used:

- Von Mises stress at certain point. Stress is used in calculations of weld capacity in design standards;