Assistance Needed for Converting a LS-DYNA Barrier Model to Radioss
Hello everyone,
I am currently working on a project to model and simulate the impact of a motorcyclist against a road barrier to assess injuries, both with and without the use of an airbag.
- Project Context:
- The airbag and motorcyclist models have been fully developed and are functioning correctly in Radioss.
- The barrier model, however, was retrieved from previous work and was initially developed in LS-DYNA. I am now in the process of converting this model to integrate it into Radioss.
- Issue Encountered:
- I used Altair's Convert tool for the conversion. Unfortunately, I noticed that some data, such as the details for bolts, seem to have been lost or misinterpreted during the process.
- My objectives are as follows:
- To determine if there is a method or process that allows the conversion of an LS-DYNA model to Radioss while retaining all information (materials, properties, contacts, etc.).
- To verify that the converted Radioss model is identical to the original LS-DYNA model.
- Specific Cards Requiring Conversion:
- The
*MAT_SPOTWELD_TITLE
card used for welds. - The
*INITIAL_AXIAL_FORCE_BEAM
card used to initialize axial forces in beams.
- The
I am attaching both versions of the model (LS-DYNA and Radioss) to this message for reference. If anyone has suggestions or experience with this type of conversion, I would greatly appreciate your guidance:
- Is there a way to ensure all data is preserved during the conversion?
- How can I verify that the Radioss model accurately replicates the original LS-DYNA model?
- If necessary, how can I manually recreate or adapt specific cards, such as those mentioned above, in Radioss?
Thank you in advance for your help!
Best regards,
Answers
-
Hello @Khazri Jaber
The best way to convert a Dyna model to Radioss is by using the Altair D2RAD converter, which is inside Altair Compute Console → Apps → Altair Radioss Converter:
The keywords you mentioned (*MAT_SPOWELD and *INITIAL_AXIAL_FORCE_BEAM) are supported by the 2024.1 converter. You can find the complete list of the supported keywords here: LS-Dyna Input
At the end of the conversion, a log file will be created showing how each keyword was mapped and listing any keywords that couldn't be mapped, if any.
2 -
Bonjour @Guilherme_Brandao
Thank you for your response and the information regarding the use of the Altair D2RAD converter in version 2024.1. However, I am currently working with version Compute Console 2022.2, which does not have the latest improvements to the converter.
I would like to know if the converter available in this version (2022.2) can also handle keywords like *MAT_SPOTWELD and *INITIAL_AXIAL_FORCE_BEAM when converting a model from LS-DYNA to Radioss. If not, could you guide me on how to proceed manually or with additional tools to effectively convert the models?
Additionally, I would appreciate any further information or resources to successfully perform the conversion using my current version.
Thank you in advance for your help!
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