1. Multiple soil layers should be horizontally and parallel each other.
2. This problem should be estimated under free vibration. Shear modulus of soil will be used here.
3. Stiffness of spring which will be chosen as Ki=Gi / hi and so on.
4. Of course, Damping should be null here.
5. One-dimensional linear model must be just like cantilever column.
In this case how to model this on the LIRA SAPR. how to input material properties on it. Please help me to solve that.