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MODELLING A JOINT IN A PENDULUM

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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Adriano Koga_20259

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

BULA

NO, it doesn't help!!!

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

Simon Križnik

@BULA

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

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

BULA

I'm using RADIOSS and not Hypermesh.

That video doesn't help me!!!!

Simon Križnik

Sorry for the confusion.

Here is a procedure to create a KJOINT2 in Radioss:

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

BULA

thanks for your help!!!

In my case should i use a spherical joint?

Simon Križnik

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.