-
-
April 17, 2019 at 4:38 pmmarcocesariSubscriber
Hi, i would to konw how apply remote displacement on surface in relation to a point. In particular i try to fix all traslation of a surface in relation to a point but i want that this surface have free rotation in relation with this point. In other words i would apply an spherical joint on my body in Ansys Mechanical APDL.
Thanks, Marco CesariÂ
-
April 17, 2019 at 7:46 pm
-
April 18, 2019 at 7:41 ammarcocesariSubscriber
It's not possible to use keypoint and surface in the command 'CM' that you have linked, so how can i relate keypoint and surface?
If i'm not wrong in this way i create an named selection with the keyopoint, but don't relate the keypoint with surface of my body. My idea is to relate point and the surface of my body constraining only traslational degree of freedom between the surface and keypoint and then fix the point in the absolute coordinate system. In this way i would constrain only traslational degree of freedom of my surface compared to keypoint and would have free the rotational degree of freedom
thanks
-
April 18, 2019 at 10:44 amjj77Subscriber
Ok - you can use constraint equations typlically for this.
Â
CERIG (constraint equations of rigid type - one can choose to use only transnational dof) is one option making the surface stiff where the remote point connects to (think one needs to have a mass21 element on that remote point/node attached, but you can set the mass to almost zero 1E-10 kg or something)
Â
If you do not want to add stiffness, then there is RBE3 which is for applying remote loads to a surface/edge and that does not add stiffness.
(attached is an example of RBE3 where a central node (nr 3) is connected to the edge of a shell mesh - taken from ansys helpÂ
7.16. Example: Quasi-Static Analysis of a Multi-Rotor System
)Â
Â
Finally one can use more general MPC type.
Â
Search all this and you will get loads of info on the internet (I have not used these commands for many years but they should still work).
Also this pdf is good:
-
- The topic ‘Remote displacement on Ansys Mechanical APDL’ is closed to new replies.
- Problem with access to session files
- Ayuda con Error: “Unable to access the source: EngineeringData”
- At least one body has been found to have only 1 element in at least 2 directions
- Reaction forces and moments during random vibration at local coordinate systems
- Using APDL to extract stresses on a beam element.
- How to select the interface delamination surface of a laminate?
- Geometric stiffness matrix for solid elements
- Timestep range set for animation export
- Non-linear convergence issue
- Computation Accleration
-
1156
-
471
-
468
-
225
-
201
© 2024 Copyright ANSYS, Inc. All rights reserved.