Difficulty outputting/interpreting .sty variables in Radioss

Aslan_20571
Aslan_20571 Altair Community Member
edited June 2023 in Community Q&A

Hi all, 

 

For a project, I would like to extract outputs (such as plastic strain, internal (specific) energy etc.) for each time increment of my radioss solution to python. The outputs in h3d or anim are not direcly interpretable, hence my decision to use .sty (ASCII).

The issues: 
- The specific/internal energies per element in the sty-file are not equal to those in the anim files (using hyperview), while the sampling time is equal. However, the distribution is the same, as each value is ~1/366200th of the anim results. Where does this random factor come from? Are the definitions of the specific energies different anim/sty?

-Additionally, the plastic strain results are all zero in the sty files, while the anim solutions in hyperview clearly show plasticity. 

 

What is going wrong here? Is there a better way to export these results without loading each increment in hyperview (for automation, I want to keep result extraction as simple as possible). 

Hope someone can help me!

best, 
Aslan

 

Edit: 

I am using the /OUTP command in the 0001.rad file. 
such as: 

/OUTP/DT (with the corresponding values 0 and 1e-3)
/OUTP/ELEM/EPSP

/OUTP/ELEM/ENER

Tagged:

Best Answer

  • PaulAltair
    PaulAltair
    Altair Employee
    edited June 2023 Answer ✓
    Paul Sharp_21301 said:

    The difference is coming from Anim values being Energy / Rho of your material

    So, in your case, I assume your density is 1/366200 = 2.73e-6 (Aluminium in Kg/mm^3)

    Another route you could use would be to use compose to extract the data from h3d directly

    STY is solid internal energy, Anim is Element specific energy (internal energy/density)

Answers

  • PaulAltair
    PaulAltair
    Altair Employee
    edited June 2023

    The difference is coming from Anim values being Energy / Rho of your material

    So, in your case, I assume your density is 1/366200 = 2.73e-6 (Aluminium in Kg/mm^3)

    Another route you could use would be to use compose to extract the data from h3d directly

  • PaulAltair
    PaulAltair
    Altair Employee
    edited June 2023 Answer ✓
    Paul Sharp_21301 said:

    The difference is coming from Anim values being Energy / Rho of your material

    So, in your case, I assume your density is 1/366200 = 2.73e-6 (Aluminium in Kg/mm^3)

    Another route you could use would be to use compose to extract the data from h3d directly

    STY is solid internal energy, Anim is Element specific energy (internal energy/density)

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