*SECTION_DISCRETE
Defines section properties for solid elements. DRO is the Displacement/Rotation Option.
SECID = ID of the section.
DRO =
0 for translational spring/damper.
1 for torsional spring/damper.
*ELEMENT_DISCRETE
Specifies spring elements.
EID = ID of the element.
PID = ID of the part it belongs to.
N1 = ID of nodal point 1.
N2 = ID of nodal point 2.
*MAT_SPRING_ELASTIC
This keyword is used in support of spring connections, the K parameter of this material keyword is the stiffness of the string.
MID = ID of material type. Must be unique between the material keyword definitions.
K = Elastic stiffness (force/displacement) or (moment/rotation).
*MAT_DAMPER_VISCOUS
This keyword is used in support of spring connections. The damping constant DC of this material is the damping parameter of the spring, if this damping is non null.
MID = ID of material type. Must be unique between the material keyword definitions.
DC = Damping constant (force/displacement rate) or (moment/rotation rate).