Connecting Beam and Rod elements

Rahul_P1
Rahul_P1
Altair Employee
edited October 2020 in Community Q&A

Hello Guys,

i want to solve a problem with a bicycle wheel. the issue is a bicycle wheel wich knocks against the edge of a kerbstone.

The plan is to simulate the spokes as ROD elements and the outer wheel as BEAM elements. I created a circle line and on that line i extracted 19 nodes for the spokes. for the middle circle i did the same and connected the nodes with 19 beam elements as shown in the picture below.

Then i created a line mesh on the outer circle and used beam elements. Now i search for a way to connect the spokes with the outer wheel, the rod with the beam elements.

The little rectangle in the lower right corner just represents the kerbstone and is ment as a support thing...it has no elements assigned.

Thanks for the help!

zpp36-Felge.png

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Answers

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited May 2015

    Based off my understanding from your description, you want to know how to connect your ROD elements representing spokes to the BEAM elements represented as the outer wheel. You stated that you created a line mesh and i'm assuming that you did that by creating the beam elements as your outer wheel and not using the 1d line mesh option. When you created the BEAM elements, the ends of them are considered nodes and when you create a rod element, you have to select two nodes. So if you placed nodes on the smaller circle, you can use those as one of your node selections. That will connect the ROD elements to the BEAM elements.

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited May 2015

    Thank you for the help so far. I solved the problem by forcing the beam elements of the outer wheel to start and end at that point i want to connect a rod element as a spoke with. i had to extract 19 nodes on the outer line and split the line at each point so there is a connection point between the beam elements at the right place...it was a little work to do but at the end i got nice results.

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited May 2015

    Ok sounds good. There are indeed a few different methods to achieve that and some definitely take longer to set up compared to others

  • ajd-brown
    ajd-brown Altair Community Member
    edited March 2016

    Hi Rahul, 

     

    I am performing a similar analysis to the above, is this method an efficient one or are there faster/better methods?

     

    Regards,

     

    Anthony

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

    Based on region of interest one could give a try using this approach.one must be aware of limitation of Rod element.

     

    Regards

    Rahul R

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