Dear Thamanna,

LS-DYNA doesn't support the definition of SPCs in a cylindrical coordinate system.

In LS-PrePost you have the option to automatically define and invoke local cartesianÂ coordinate systems in the the keyword input so as to enforce nodal SPCsÂ in a cylindrical coordinate system using:

Â Â Â Â Model > CreEnt > Boundary > Spc > Cre

Then hit the radio button "Set" or "Node", if "Set" is true, then multiple nodes will have the same local coordiante system,

otherwiseÂ each node to be constrained will correspond to aÂ single *define_coodinate_system and *boundry_spc_node.

Check box by "Cylindrical CS".

Select (and create if necessary) a CID and a direction in that CID (cartesian X,Y, or Z) that corresponds to

the z-axis in the cylindrical coordinate system.

Pick some nodes to be constrained, hit "Apply".

Kind Regards,

Bernd