Influence of clamping (ANSYS)
Influence of clamping (ANSYS)
(OP)
When one clamps an area in the real world it is not perfectly clamped like it is defined in Finite Element Software.
So I tried to test out what the influence of clamping was, in ANSYS. I had an idea to connect every node on the area of the clamping with springs. The springs would have a high K (stiffness). And the other end of the springs would be constrained.
However that seems to be alot of work. I wondered if someone had a better idea. Is it possible to do this automatically in ANSYS.
I would appreciate any advice. Thanks in advance and hope to hear from you.
Kindest regards,
mab
So I tried to test out what the influence of clamping was, in ANSYS. I had an idea to connect every node on the area of the clamping with springs. The springs would have a high K (stiffness). And the other end of the springs would be constrained.
However that seems to be alot of work. I wondered if someone had a better idea. Is it possible to do this automatically in ANSYS.
I would appreciate any advice. Thanks in advance and hope to hear from you.
Kindest regards,
mab





RE: Influence of clamping (ANSYS)
A better way is to model at least a part of your supporting structure, or include it as a super-element (a stiffness matrix derived from a model of the support structure).
RE: Influence of clamping (ANSYS)
Johnhors is basically true, but there is at least one method in order to improve implementation of this technique: uniformly-spaced quadrilateral mesh on "elastically-constrained" surface with MESH200 elements, then mesh the volume with the appropriate solid elements (must support pyramidal transition). Then the "constraint" stiffness is uniformly distributed on surface.
This method has to be implemented with caution, of course, but I have plenty of examples where it works very great.
Regards
RE: Influence of clamping (ANSYS)
I would write a small apdl code for this problem.
Regards,
Alex
RE: Influence of clamping (ANSYS)
Another possible solution is to create a rigid body between the nodes of the area and a master node. A spring with 3 translational and 3 rotational stiffnesses is then linked between the master node of the rigid body and a clamped node.
You have only 6 dofs as parameters but the area moves like a rigid plane (nodes can't move away).
You can replace the rigid body by a rigid plane (nodes can move away on the area which remains plane).
Modelling depends on the physics of your problem and on what you are interested.
Are you interested in stress field?
Is the result near the frontier or not?
Regards,
Torpen
RE: Influence of clamping (ANSYS)
The problem is related to the clamping of a plate for modal and harmonic analysis and what influence it had on the resonance frequencies of the plate and the dynamic tip deflections of that plate.
Kindest regards,
mab