Assistance Needed for Converting a LS-DYNA Barrier Model to Radioss

Khazri Jaber
Khazri Jaber Altair Community Member
in Community Q&A

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:
      1. 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.).
      2. 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.

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,

SPM.k
SPM_0000.rad
SPM_0001.rad

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