When solving a problem with CROD elements you will see the following output (NX nastran 7.0) in the *. Solutions: you must restraint rotations on your constraints or use permanent nodal constraints on constrained nodes. ![]() ![]() You must issue PARAM,AUTOSPC,YES to automatically constraint rotational RY & RZ (DOF 4&5) on CROD elements, but please note you have torsional rotational DOF, if you let alone CROD elements without constraining the torsinal DOF then you will receive error of the type "RUN TERMINATED DUE TO EXCESSIVE PIVOT RATIOS IN MATRIX KLL". The CROD element is ideal when you need an element with only tension-compression and torsion. TrussFormer is an integrated end-to-end system that allows users to 3D print large-scale kineticstructures, i.e., structures that involve motion and deal. While you can use a CBAR or CBEAM element to represent a rod member, these elements are somewhat more difficult to define because you must explicitly specify an element coordinate system. The CROD element is the simplest element of all the elements that have geometry associated with them.
0 Comments
Leave a Reply. |