MODELLING A JOINT IN A PENDULUM

BULA
BULA Altair Community Member
edited March 2021 in Community Q&A

I need your help.

I'm trying to model a block (prop solid, mat M2 plas john) like a pendulum. I would like to represent the rope like a RBODY but i don't know how to create the joint. which kind of joint should i use??? and the spring???

 

please help me!!!!!

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Answers

  • Adriano Koga_20259
    Adriano Koga_20259 New Altair Community Member
    edited March 2021

    how about this example model in the documentation? Does it help?

    image

  • BULA
    BULA Altair Community Member
    edited March 2021

    NO, it doesn't help!!!

    I've already read that example but it doesn't explain how to create the joint!!!!

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited March 2021

    @BULA 

    try creating FE joint following the procedure from 4:20 onwards:


    https://www.youtube.com/watch?v=dT7uv2hI818

  • BULA
    BULA Altair Community Member
    edited March 2021

    I'm using RADIOSS and not Hypermesh. 

     That video doesn't help me!!!!

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited March 2021

    Sorry for the confusion.

     

    Here is a procedure to create a KJOINT2 in Radioss:


    https://www.youtube.com/watch?v=LyKc5okQawE

     
  • BULA
    BULA Altair Community Member
    edited March 2021

    thanks for your help!!! 

    In my case should i use a spherical joint?

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited March 2021

    I am not sure what you are trying to do. 

    A revolute joint would constrain motion in the plane while a spherical joint would also allow out-of-plane degrees of freedom.

    Also note these joints are not truly kinematic, because the blocked degrees of freedom actually have finite stiffness.

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