D3PLOT 22.1

Methods of Obtaining Written Force Output


Methods of obtaining written force output
Method 1: Instantaneous force output on Cut-section menu
Method 2:  FORCES... button in the Cut-sections menu

The table of forces given here has been improved in D3PLOT 20.0. It now uses the same style as the Write table. It contains a row for each combination of model ID, window ID, direction index, offset (to distinguish parallel planes) and part ID. Each row shows the contribution of that part to the cut section force and moment components. For each combination of model, window, direction and offset there is also a row for the total across all parts, which additionally shows the cut force magnitude, the coordinates of the centroid of the intersection of the plane, and the area. Remember that elements which are blanked are not included, and parts which do not contribute any force are also not reported in order to keep the list short. An example is shown below:

The rows of this table can be sorted in ascending order with respect to a column by clicking on that column header. To sort in descending order, the column header can be clicked again.

Force data can be saved as Text, CSV and XLSX file from the top of this table.

The output files contain additional header information recording the properties of each cut at the top of the listing.

Method 3:  WRITE TO FILE button in the Cut-sections menu

Outputs the same data as above, but writes it to a CSV file
Method 4:  WRITE Output (as an entity type)

When a cut-section is current the SECTION entity will be available as an "entity" type in the WRITE menu:

To use this select SECTION and then a data component.

You can select a scalar component, (such as FX_X_CUT_FORCE as shown here), or a summary of all forces and moments.

The advantage of using WRITE is that the results can be directed to file for subsequent use. An example of such output is given below



++++++++ Data at time .30046E-02 ++++++++
CUT_SECTIONs:
listing of CS_CUT_SUMMARY
Cut section:
Fx
Fy
Fz
Mxx
Myy
Mzz
-----------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------
Section
-9.667E+03
1.290E-04
-2.004E+00
-5.770E+01
-1.114E+06
1.1166E+05

Obtaining XY graphs of cut-section forces wrt. time.

It is possible to use cut-section forces as a valid entity type for output in the XY_PLOT command, in a fashion similar to WRITE . When there is a current cut-section the entity type SECTION will be available in the XY_PLOT panel.

Choose the SECTION "entity" type, followed by a scalar data component, and the results of that component versus time will be generated.

Results can be written to disk as "curve" files, using the name sect001.cur etc, and also drawn as graphs in D3PLOT.

The figure below shows typical output of X cut force vs. time.

Note that you can also write plotted results to a curve file using the FILE... command on the plotting panel. (See Section 6.8 for more details.)

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