Use a Joint together with a Joint Load to prescribe a relative motion (relative displacement and rotation) between two bodies in Ansys Mechanical as Boundary Condition. See the following link for a table with allowable DOF for applying Joint Loads. https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/wb_sim/ds_load_joint_condition.html Note: Joint Loads can be defined for all Joint Types except fixed, general, universal, and spherical joints. For the prescription of a general relative motion, use a Bushing Joint with no (0) stiffness in all 6 DOF (3 translations and 3 rotations). Then define a Joint Load for each of the 6 DOF to specify the relative motion. Please find a simple example attached (workbench archive). Note: Alternatively, I might be useful to define a contact with tabular contact offset definitions (tabular CNOF). https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/ans_ctec/Hlp_ctec_realkey.html%23stradjin5jla072099 (Defining Real Constants in Tabular Format) Keywords: relative motion, relative displacements, relative rotations

Attachments:
1. RelativeMovementByJointBushing_2019R3.wbpz