Single Analysis Templates
Single analysis templates
All the single analysis templates follow the same process, so we'll use the EuroNCAP Front ODB Impact template as an example for how to use them. The section will describe how to run them interactively using the menus in REPORTER, but it is also possible to run them in batch mode.
Select the template
Use the menu and select a template from the tab (see Reading an existing template or report for more details).
Generate the template
After selecting the template REPORTER should prompt you to select the keyword file of the job you want to post-process:
After pressing 'OK' a file selector is mapped for you to select the keyword file.
In order to correctly extract the results needed for the protocol the template needs model information such as Node IDs, Beam IDs, the unit system, etc. This needs to be supplied to the template either from a .CSV file or from comments written in the keyword file after the *END keyword. The template will help you to create this information ( you should only need to do this ONCE for a particular vehicle programme so long as IDs remain the same ).
The template will scan the keyword file to see if it contains the required information after the *END keyword. If it does you will be asked if you want to use it:
If you press 'Yes' then the next few questions will not be asked.
If you press 'No' or the keyword file doesn't contain the required information after the *END keyword you will be asked if you have a .CSV file with the information instead:
If you have a .CSV file, press 'Yes' and select it in the file selector.
If you press 'No' REPORTER will inform you that it will start PRIMER so you can select the required information interactively:
After pressing 'OK' PRIMER will start, the model will be read in and a window will be open for you to interactively select the required information:
You can select the information either by picking the entities in the graphics window, typing it in to the textbox or selecting it from a list of *DATABASE_HISTORY_XXXX entities in the popup menu. If they are defined with the _ID option then the names will be used instead of the numbers, e.g.
After you have selected the information you can need to save it either as a .CSV file or post *END data. Next time you use the template, perhaps on a slightly modified model, you should be able to reuse this data without having to go back into PRIMER each time (so long as the IDs of entities you want to extract data from stay the same).
PRIMER will close and REPORTER will ask for the directory containing the analysis results (which may be different to the location of your kewyord file).
Press OK and select the directory.
Finally you will be asked for a directory where REPORTER should write any images.
Press OK and select the directory.
REPORTER should now have all the information it needs. T/HIS will load and carry out the post-processing according to the selected protocol, generating the required graphs. Once this is finished, REPORTER will ask a final question asking you how/if you want to save the report:
If you don't want to save the report, just press 'Cancel'. If you do, select the format(s) you want to save it in, press 'OK' and select where you want to save it in the file selector that will pop up.
The final report should look something like this, with a front summary page showing the protocol scores in tables and as an image; a page to change subjective modifiers that can't be calculated automatically from the analysis; tables and graphs showing the analysis results and protocol scores in more detail:
Subjective modifiers
In general most data can be extracted automatically from the analysis results and then processed according to the protocol. However, some data is subjective and requires the user to look at the analysis results and manually set the values.
For example, the EuroNCAP front ODB impact test has some modifiers which are applied as penalty points to the calculated scores, e.g. if an airbag doesn't deploy correctly a 1 point penalty is applied.
These subjective values can be set on the second page of the report after it has been generated. This lists all the subjective modifiers and their current value and a button to edit them:
Press the 'Set Modifiers' button and then set the values in the window that pops up:
After setting the values and pressing 'OK' the template will recalculate the scores. This allows you to carry out 'what-if' type analyses.
General Ansys LS-DYNA Model template
The General Ansys LS-DYNA Model template is a basic single analysis template that can be run for any Ansys LS-DYNA model.
As with any of the single analysis templates, REPORTER will prompt you to select the keyword file of the job you want to post-process, the directory containing the results, and the directory to which you wish to write images. It will then scan the *.otf (or d3hsp) file in order to provide diagnostic information in a summary table. The information includes the Ansys LS-DYNA version used, the computation time and the termination status.
REPORTER will also use the results files to produce an energy balance plot and to produce images of the model at the first and last plot states. These basic report data serve as a quick method for checking the succesful outcome of an Ansys LS-DYNA simulation.
General Ansys LS-DYNA Vehicle Model template
The General Ansys LS-DYNA Vehicle Model template is the same as the General Ansys LS-DYNA Model template, with the addition of an intrusion plot output. The intrusion plot shows the deformation of selected parts (e.g. dashboard or driver door components) relative to fixed reference nodes (e.g. three nodes on the undamaged body structure on the far side of the vehicle).
If you have not previously saved the information required to set up the intrusion plot, REPORTER will inform you that it will start PRIMER so you can select the required information interactively. You will need to define:
- Vehicle Impact
Choose either Front Impact or Side Impact. This controls the camera angle for the intrusion plot. Front Impact assumes that the impact is in the global +X or -X direction whereas Side Impact assumes global +Y or -Y direction.
- Intrusion Parts
Select the parts that will be shown in the intrusion plot. Remaining parts will be blanked.
- Ref Nodes
Displacement magnitude will be plotted relative to a triad of three nodes using D3PLOT's REFERENCE_NODE tool (refer to 6.3.5 in the D3PLOT manual). Select three nodes on a relatively undeformed part of the structure on the far side of the vehicle from the impact, with nodes N1 and N2 aligned with the impact direction.
