Rigid body momentum distribution

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

Hello,

 

I'am setting up a hypermesh model and I ran into two problems I could not resovle in an appropriate manner. I have a momentum at some point on an engine and 6 mounts, which are constrained on the ground.

How can I model that engine without a CAD model? We can assume the engine to be completely stiff. The attachment points of the engine should not be independent from each other. I tried to model this with rbe3 elements as you can see in the picture below, but this results in diplacement of the attachment points independent from each other.

 

<?xml version="1.0" encoding="UTF-8"?>image.thumb.png.c8ec23e6458b0b5168b0402478411323.png

 

 

I would be very thankful for any ideas on how to model this rigid body.

 

Kind regards,

 

alex

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi Alex,

     

    How are you modelling engine?

     

    Is it using concentrated mass?

     

    I am assuming that the mounting point should be together (for not to be independent) in such case maybe you can connect them using RBE2 elements?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    Hello Prakash,

     

    thank you for your reply. I followed your suggestion and added rbe2 elements. The problem was, that one node cannot have more than 1 rigid attached to it.

    Regards,

     

    Alex

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    Hi Alex,

     

    I hope you are all set now. Please let me know if you need any help. :)/emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'> 

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