PhysicsAI ignores impact velocity but detects geometry variation

Thomas1605

Crashtube_20mm.hm

Hello,

I have a problem regarding PhysicsAI. I have a crash tube model that is being deformed, and I would like it to generate reasonably reliable predictions for varying radii and impact velocities.

I created a dataset with different radii and, for each radius, two different impact velocities (8 m/s and 5 m/s). So far, there is no problem. However, when I try to run a prediction, it recognizes the different radii but not the different impact velocities. As a result, the prediction does not distinguish whether the model has an impact velocity of 8 m/s or 5 m/s.

Is there a way to make it recognize the different velocities as well and not only the different geometries?

I am working with Altair 2025.1 and Radioss.

Garima_Singh

Hi @Thomas1605,

PhysicsAI defaults to recognizing only geometrical variation.

Hence, to add the different impact velocity as an input to the PhysicsAI model, one has to use the Global/Nodal hooks approach detailed in the online documentation links listed below,.

https://2025.help.altair.com/2025.1/hwdesktop/hwx/topics/tutorials/hwx/physicsai_custom_input_nodal_hook_t.htm for varying nodal and elemental forces, boundary loads, and so on) for training.

https://2025.help.altair.com/2025.1/hwdesktop/hwx/topics/tutorials/hwx/physicsai_custom_inputs_t.htm for varying material properties, global boundary conditions, and so on) for training.

Many thanks.

Kind Regards

Garima Singh

Engineering Data Science