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Yes, that's what I'm thinking, but I can't find an option for this in Calculix. Below is the section of my input code dealing with the Contact. I've specified the ballast as the independent surface (a single 8 node brick element) and the nodes of the track (constructed from 3 node beam...

Hello, I'm using calculix to model a railway track panel that is being lifted between the bogies of an on-track machine. To model the track support structure (i.e. the ballast) I have created a surface on which the track sits. I was hoping that this arrangement would provide the stiffness I...