And also, which one should be used where? An example for each case will be very much appreciated. Thank you.
If a Face has 64 nodes on it, then there will be 64 springs to ground created for the elastic support.
If you add a spring to ground to the same face, there will be one spring created with a rigid spider to the face. However, the spider can be changed to deformable.
The elastic support is always perpendicular to the face. A spring attached to a face can go in any direction.
The elastic support spring rate is N/mm^3 while the spring rate is N/mm
The spring can have damping, but the elastic support cannot.
The spring can have a preload, but the elastic support cannot.
The spring can be defined between two points, so it has a length. The elastic support is only defined as a spring rate.
Rigid and Deformable only applies to a Spring. It doesn't apply to Elastic Support. Elastic Support is like Deformable in that no extra stiffness is added to the model in addition to the spring rate.
Elastic Support is simply a a spring rate per unit area. If you had a face with an area of 16 mm^2 and you wanted a spring rate for the whole face of 2 N/mm then you would use an elastic support with a spring rate of 32 N/mm^3. If you edit the geometry and cut the face area in half, the elastic support will end up being equivalent to a single spring of 4 N/mm.
Here is a good example of an elastic support: https://forum.ansys.com/discussion/19500/how-to-model-a-beam-on-elastic-foundation
Anyone on this?
Hi @Rameez_ul_Haq ,
Please see if the following link helps:
Thank you for attaching a link, but the content in that link unfortunately doesn't answer what I was looking for.
The forum says that the foundation stiffness for an elastic support 'offers stiffness per unit area' but the foundation stiffness in elastic support is in the units of N/mm³ for a face of a solid. The forum is dedicated for an APDL command to implement the elastic support, whereas I want to know the difference between if I will add the elastic support, as compare to if I add a spring support to the same face.
Need help on this one please?
@peteroznewman, the elastic support makes the scoped face as rigid or deformable? Is there a way to change that?
How can I input a correct foundation stiffness for the elastic support? Can you give an physical example for me of each to clearly percept in which case elastic support will proof to be fruitful and in which case spring connection can do the work?
Ansys customers with active commercial software licenses can access the
customer portal and submit support questions. You will need your active account number to register.