motion of body in movable coordinate frame

rea2
rea2 Altair Community Member
edited October 2020 in Community Q&A

Hi,

In the snip attached, I want rigidbody B to rotate with rigidbody A. To do this I have a movable reference system (/SKEW/MOV) defined on node 2 which is slave node of rigid body A and i have assigned a fix boundary condition for the master node 1 of rigid body B in this reference system. But it seems that the origin of the reference frame stays at its initial position and hence rigid body B is not making any motion. Can you help me figure out how to define motion of rigid body with a movable coordinate system. 

Also how do we define a /FRAME/MOV  instead of /SKEW/MOV in hypermesh, which I guess can solve this problem.

There is no such option to define Frame under the BCS_collector section. So how do I achieve the motion of rigid body in a movable coordinate system.

Regards

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

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2019

    Please check the below video from youtube.Presenter is talking moving & fixed skew from 25th minute. 

    https://www.youtube.com/watch?v=Z5gn6sRu4W8&list=PL1u26y75SCrA_BOCLaSewVCNY7xRvCTnA&index=3

     

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited July 2019

    Hi,

     

    If I understood you correctly you can use a  a /FRAME/MOV for this. 

    A simple example is provided for the same. Two similar components are provided with an imposed velocity. For the left side component a function for imposed velocity is created and a moving frame is defined for that component . For the right side component the imposed velocity function defined is 0, but the created reference frame for the other component is recalled here. The relative motion with respect to the reference frame is measured which makes the other component to rotate.

     

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

     

    Please check the video file attached along which shows the animation of the same.

     

     

    Frame or skew, movining or fixed systems can be created by ctrl+f and typing skew or frame in the box in the upper right corner. System types can still be switched after creation by card edit.

    Unable to find an attachment - read this blog

  • prat
    prat Altair Community Member
    edited July 2019

    Hi,

    I found that  there is no available option of FRAME for BCS load collector, eventhough it is available for imposed velocity and some other types of boundary conditions.

    regards,

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