This type selects a FFlex body or RFlex body if there are several FFlex bodies and RFlex bodies in the model.
Figure 1 Mesh Data Type – Select Flexible Body
•Flexible Body: Select a FFlex body or RFlex body in Working Window.
•Reference Frame: Select the reference frame of the selected FFlex body or RFlex body.
•Interface Nodes: Defines the constraint modes by selecting the connecting points which are nodes of a flexible body. For more information, refer to How to Set Interface Nodes.
•User defined DOFs for Computing Constraint Modes
•If this option is unchecked, all DOFs of interface nodes are used in constraint modes in CMS analysis. (This is default.)
•If this option is checked, the generating constraint modes of the defined interface nodes can be controlled by defining the DOFs for interface nodes. By default, all DOFs of interface nodes are used in constraint modes in CMS analysis.
•Set DOFs for Each Node in Node Set
•If this option is checked, when “Select Multi Node Set” is used, user can define a single setting adapted to including all nodes of each node set
•Set DOFs: Defines the DOFs of interface nodes for computing constraint modes through the dialog after clicking Set DOFs as shown below. User can set a special coordinate system each node or a node-set or node-sets for the constraint modes. The coordinate system is available Cartesian or Cylindrical coordinate system.
Figure 2 Using the Set DOFs option
Figure 3 Using the Set DOFs option using Select Multi Node Set
Figure 4 Cylindrical coordinate system at the SetDOFs option
Note
When selecting a RFlex body in the dropdown menu of Flexible Body, there are two limitations as follows.
The RFI file of the selected RFlex body must have Element, Property and Material data. And, the data of the Element, Property and Material must be a completeness without a lack. In case of generating a RFI file from NX-Nastran, you can add this kind of information to the generated RFI by using RFI Optimizer.