{"id":50045,"date":"2020-11-23T08:29:02","date_gmt":"2020-11-23T08:29:02","guid":{"rendered":"\/forum\/forums\/topic\/why-do-we-need-to-restrain-both-the-translational-and-rotational-dofs-to-avoid-rigid-body-motion\/"},"modified":"2020-11-23T08:29:02","modified_gmt":"2020-11-23T08:29:02","slug":"why-do-we-need-to-restrain-both-the-translational-and-rotational-dofs-to-avoid-rigid-body-motion","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-do-we-need-to-restrain-both-the-translational-and-rotational-dofs-to-avoid-rigid-body-motion\/","title":{"rendered":"Why do we need to restrain both the translational and rotational DOFs to avoid rigid body motion?"},"content":{"rendered":"

This may be a simple concept to some, but is a little confusing for me. For example, I have a cantilevered beam and I apply a transverse force on one end and apply fixed support on the other. The beam will not undergo a rigid body motion because there will be reaction force and moment at the support. The nodes of the elements in fixed support cannot undergo any rotation as well as translation.nNow, if I only restrict the translational DOFs on the supported end, then this would automatically mean that the rotation at that end is restricted since rotation requires a tranlational motion of the nodes on the supported end. Will there be a rigid body motion in this case? Why won’t I still see a moment reaction at the supported end? What is the basic difference in restricting the translational DOFs and rotational DOFs?n<\/p>\n","protected":false},"template":"","class_list":["post-50045","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t