I'm performing a modal analysis on two cylindrical structures(shells) connected to each-other by springs.
The spring must have stiffness in all the 3 coordinate system directions and a rotational spring .
I was able to provide body-body contact for the longitudinal direction and Body-ground condition individually to the two shells for the transverse direction. I was able to change the definition to torsional to simulate the rotational spring.
However, I'm unsure on how I must provide spring stiffness to simulate connecting stiffness in the circumferential direction.
Is there any way of providing it?