Change ACCEL type in starter file mid simulation

Crashphys
Crashphys Altair Community Member
edited October 2020 in Community Q&A

Hi,

 

In the attached video, the instructor mentions that BC's and initial velocities can be changed mid-simulation using a restart procedure. Since he specifically mentions BC's and Initial velocities, I am wondering if this also extends to other BC's like accelerations. I am currently running a costly simulation and really do not want to restart it just to change a load case that I have not used yet. I want to change a /GRAV card to an /IMPACC card. The acceleration does not begin before the point which I want to restart, so changing it will not change results prior. 

 

If I want to change accel types, will the solver read my modified starter file, or will I have to rerun my starter file for it to read it thereby erasing all my progress?

 

I tested to see if I can change the /GRAV card by purposefully sabotaging by inputting values which should break the simulation, then ran my _0002.rad engine file. The solver carried on like normal, which implies to me that I have to re-run my starter file to change the acceleration type. If a procedure exists so that I can change accel type mid simulation, please let me know.

 

Thanks

 


 

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Answers

  • Andy_20955
    Andy_20955 New Altair Community Member
    edited May 2020

    Hi,

    Sorry you cannot change /GRAV or accelerations via a restart.  You will have to rerun the analysis from the beginning.

    Thanks,

    Andy

     

     

  • Crashphys
    Crashphys Altair Community Member
    edited May 2020

    Thank you for letting me know. There goes 7 days of my life :'(

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