Velocity defination in radioss

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi all

I am solving a small model in radioss

there are two parts A & B in front of each other

A is fixed and B is moving with a velocity of 1.111mm/ms towards A

when i solve the model in radioss i get 0-errors and 0-warnings

but the problem is that B moves towards the A but does not come in contact

if i increase the velocity of B it comes in contact

can any one tell me why this is happening

i want the results with velocity=1.111mm/ms

please reply

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Hi Mr.SalimKhan

    Basically you will have to run the problem for longer duration!

    What is the distance you have between parts A and B initially;

    The time taken for part B to strike part A is = distance/1.111mm/milisecond

    All in all you will have to run the problem for a duration, say 2 to 20 times this time. Are you running the problem for this duration.

    You can review the above points....and revert back on the board

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Thank you very much

    I will run the analysis for longer duration and check the analysis

    is there some additional website for radioss where i can find tutorials and examples for better understanding of the radioss

    once again thank you very much

    Salim KHAN

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Thank you very much for your support

    the problem which i was facing is solved now

    but now i am facing a new problem

    it does not creats T01 data for processing in hypergraph

    it gives me this error

    1 error: MOTIONPLOT EXTERNAL XY READER ERROR

    What does error exactly means

    this is my D01 file below

    TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

    # RADIOSS ENGINE INPUT DECK

    # Altair Engineering, Inc. © 2004

    # Radioss Engine Deck Generated by HyperMesh v9.0

    #---OUTPUT DEFINITION

    ##-----------------------------------------------------------------------------

    /PRINT/-1000

    /VERS/44

    /TFILE/1

    1.000e-003

    /RUN/test1/1/

    2.00000e-001

    /ANIM/VECT/DISP

    /ANIM/VECT/FOPT

    /ANIM/VECT/VEL

    /ANIM/ELEM/ENERGY

    /ANIM/ELEM/HOURG

    /ANIM/ELEM/VONM_STRESS

    /ANIM/DT

    0.000000 0.010000

    TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

    please reply

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Salim,

    I am not sure i understand your question.

    Where do you get this error?-is it while reading in the T01 file in hypergraph?

    How large is the T01 file?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Also which version of HyperWorks are you using?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    yes i got this error while reading the file T01 in HYPERGRAPH

    the file size is 240KB

    i am using hypermesh 9.0

    but the same model i solved previously and i could load T01 file i dont know why its not loading now

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Salim,

    Is there any chance you can send your T01 file to hwsupport@altair.com. I will grab the file and figure out what is happening.

    Thanks.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    hi

    i have send the T01 file on the said address

    salim khan

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Hi

    My problem is solved

    In the D01 file i used /TFILE/1/ if i change the value as (/TFILE/) which is default or /TFILE/4/ than i can read T01 file in Hyperview

    in the Engine documentation it is mentioned that /1/ it gives binary values (not readable by most RADIOSS post-processor)

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2009

    Hi All

    In the simulation B comes in contact with A by incerasing the run time

    but i am facing a new problem immeditely after coming in contact B rebounds back

    what is the reason for the same

    need help