Transformation from Global to Local Coordinate

Yogi Adi Wijaya_20334
Yogi Adi Wijaya_20334 Altair Community Member
edited October 2020 in Community Q&A

Good afernoon ladies and gentlemen.

 

I am Yogi, a students from Indonesia. I have a problem to using local coordinate, using RADIOSS software. The problem begin, when I am finished input the new 'local coordinate' (system), and inputed the imposed (VELOCITY) using Y-Direction.  How, I change the direction of IMPVEL from Y - direction at global coordinate, became to Y - direction at local coordinate. Please hel me, to sloved this problem. Thank you.

 

Regards,

 

Yogi Adi Wijaya

<?xml version="1.0" encoding="UTF-8"?>asking.jpg

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2018

    Hi,

    While defining the imposed velocity (/IMPVEL) we have the option to select the local skew created. Please select the skew here so that the load will follow the defined skew.

     

    <?xml version="1.0" encoding="UTF-8"?>skew.PNG

  • Yogi Adi Wijaya_20334
    Yogi Adi Wijaya_20334 Altair Community Member
    edited January 2018

    Hi Johnson,

     

    I have included the influence of skew, but the results is sill not good. Then, I read a reference and found the difference between 'SKEW' and 'FRAME'. I think in this case, I must created the 'local Frame' . So, how to apllied the local Frame and then assigned to Imposed Velocity ?

     

    Regards,

     

    Yogi

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2018

    Hi,

    Create the local system and card edit the system to change it to 'frame'.

     

    <?xml version="1.0" encoding="UTF-8"?>ce.PNG

     

    To update the same in /IMPVEL, card edit the same load collector and update this frame as shown in the image below.

     

    <?xml version="1.0" encoding="UTF-8"?>card+_edit.PNG

  • Yogi Adi Wijaya_20334
    Yogi Adi Wijaya_20334 Altair Community Member
    edited November 2020

    Hi Johnson,

     

    I have tried to change a IMPVEL direction from global to local coordinate, but still can't be worked. Maybe I give you a RADIOSS file, to help me how to change the velocity direction from 'X global coordinates' to 'X local coordinates'.

     

    Please, help me to solve this problem. I am waiting four your answer, thank you.

     

    Regards,

     

    Yogi

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  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    Hi Yogi,

    I just created a local system and assigned the same to /IMPVEL and it works fine. Create your local system and assign.

    In HyperCrash you can always review the loads applied.

     

     

    <?xml version="1.0" encoding="UTF-8"?>hc.PNG

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  • Yogi Adi Wijaya_20334
    Yogi Adi Wijaya_20334 Altair Community Member
    edited January 2018

    Okay, thank you for your help..

     

    Regards,

     

    Yogi

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