Gravity in forming simulation

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

Hi!

I am using the RadiossBlock (Block140) in Hypermesh for a forming simulation and I want it to consider the force gavitational, can you please help me?

I already read the tutorials in the page, but I think they are not based in the same Block that I am using, but in he Abaqus (Standad3D) block.

Thank you very much in avance.

 

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2016

    Use Tools Pull down menu: BC manager. See attached screenshot.

    <?xml version="1.0" encoding="UTF-8"?>Gravity.JPG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Thanks. I am going to try this.

    In the Curve ID, what do I have to put if I want the gravity to be during all the simulation? in the values of X the time peiod and in the values of Y, 1 or 9810 ? I mean, I don't know if the function already takes ino account the gravity value or I have to re-write it.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    in the screenshot below, I wrote in the curve in the values of Y -9810, and int he X and Y scale factors also, but I get the rows in the positive direcion of Z and I want then in he negative direction. What am I doing bad?

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

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2016

    We have one small bug in HyperMesh with respect of this –Ve direction visualization. Check rad file in text pad it would be -9810

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    SO I have to re-write the value of the gravity (9810) in the curve function and also in the scale x and y ? it w'ont be a double graviy effect?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Hi Aurea,

    Create a curve in XY Plots>>Curve Editor for gravity load and recall that curve in Curve ID for creating a gravity load. Maintain Scale X and Scale Y values as 1 itself.

    For creating the gravity in negative Z direction (as in your model) , either you can provide -9810 value in the function you are defining or you can input Scale Y value as -1.

     

    <?xml version="1.0" encoding="UTF-8"?>Capture.JPG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    I have a curve like that already defined.

    but my gavity is in axe Z. do i have to still put -1 in the Y scale? and in the x scale I leave the value of 1, isn't it?

    Thank you very much for the help

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Aurea,

    If the values in the curve are -9810 then let the Scale X and Y values be 1 itself. Then the load will act in negative Z direction.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    i am trying as you told me but now the plis move in the Y direction.

    it is not a problem that when I define the courbe I give values to X and Y and then I say the gravity mouvement is in Z?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Direction of translation will be the direction you specify.  X and Y are meant for scaling only.

    If problem still persist, please share your model 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    thank you.

    it would be easier but it is a confidential simulation that I am not allowed to share.

    you helped me a lot.

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