Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

"Hinge assembly" problem

Please login with a confirmed email address before reporting spam

While going through the solved model 'hinge assembly' given in the COMSOL,
I came across some difficulties. Actually, I have to develop a solid model
involving hinge joint similar to what is provided in the aforementioned
example. However, I could not understand few terminologies used in the
model.

Under solid mechanics (in the model builder of the model) two global
constraints have been defined; under which in the constraint expression
it is written as "mod1.solid.b_rig2-mod1.solid.b_rig3". I did not get
any explanation of each of these terms. Because of these two I am
unable to implement similar hinge connections as well.

The model can be found in Model library> Structural mechanics> Connectors and Mechanisms> Hing Assembly.

Can anyone please help?


1 Reply Last Post 8 févr. 2013, 02:24 UTC−5
Henrik Sönnerlind COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 8 févr. 2013, 02:24 UTC−5
Hi,

The 'b' degree of freedom is the rotation around the x axis, as described in "Theory for the Rigid Connector" in the users guide.

The suffix '_rig2' etc. is the tag of the rigid connector to which this DOF belongs.

So the expression "mod1.solid.b_rig2-mod1.solid.b_rig3" forces the rotation around x to be the same for rigid connector 2 and 3.

Regards,
Henrik
Hi, The 'b' degree of freedom is the rotation around the x axis, as described in "Theory for the Rigid Connector" in the users guide. The suffix '_rig2' etc. is the tag of the rigid connector to which this DOF belongs. So the expression "mod1.solid.b_rig2-mod1.solid.b_rig3" forces the rotation around x to be the same for rigid connector 2 and 3. Regards, Henrik

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.