Autodesk Robot Structural Analysis

[#1]

I have a tower sitting on a raft with elastic parameters but I get a warning that there are no supports. Is this normal or am I missing something. Thanks in advance.

[#2 · Accepted solution]

It is normal if there is no phisical support in model.

Elastic ground is not treated by verification as a support.

[#3]

You can use elastic foundation on a panel but don't forget some kind of lateral restriant.  i.e. block UX, UY.  The elastic spring is in UZ.  Depending on the model may need to block RZ too.

Tony