Building Flex Body Models - Kxcad.net

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18 Adams/Flex To replace the body: • Select OK. Note: Adams/Flex only transfers markers and any connections they define to the flexible body. It does not transfer string variables and other children of the rigid body. Overall Procedure for Replacing Flexible Bodies with Flexible Bodies To replace a flexible body with a flexible body, perform the following steps: • Select the flexible bodies to be replaced • Align them • Transfer the connections • Replace the flexible body Each step is briefly outlined below with links to more complete procedures. Selecting the Bodies to be Replaced To replace a flexible body with a flexible body, you must create the replacement flexible body by specifying an MNF. Learn more about selecting the body to be replaced. To select the flexible bodies: 1. From the Build menu, point to Flexible Bodies, and then select Flex to Flex. 2. Under the Alignment tab, in the Flexible Body text box, enter an existing flexible body in your model. 3. In the MNF File text box, enter the MNF.. Aligning the Bodies You use the positioning options in the Alignment tab of the Swap rigid body dialog box to move the flexible body so that it is aligned with the existing flexible body. Three alignment tools are available: • Aligning center of mass of bodies • Aligning using the Precision Move dialog box • Aligning by defining three points You can use one or more of the tools to position and orient the flexible body consistently with the rigid body. Once you've used these tools, you can use the Flip about buttons to rotate the body 180° into position. Transferring the Connections You use the Connections tab on the Swap rigid body dialog box to display and transfer the connections on the existing flexible body to the replacement flexible body. The Connections tab displays a Marker
Building Flex Body Models and Node table listing the connections and how they will be transferred. It also provides options for positioning the markers relative to the attachment nodes on the replacement flexible body. 1. Review the list of marker connections and how Adams/Flex will transfer them to the flexible body. 2. To change the node to which the marker will be transferred, enter the new node ID in the Node ID text box, and then select Apply. Learn more. 3. If the attachment nodes are offset from the marker locations, you have three options: • Do nothing, and simply select OK as explained in the next procedure. In which case, the Adams/Solver (C++) creates a marker with an offset while Adams/Solver (FORTRAN) automatically introduces a massless part and fixed joint pair. You are not responsible for creating dummy parts. • Move the marker to node location. Learn about this method. • Maintain any parameterization that was set up through Adams/View. Learn about this method. Replacing the Body Once you've set the alignment and connections, you can replace the existing body with the replacement flexible body. To replace the body: • Select OK. Marker and Node Table The Connections tab on the Swap a rigid body or Swap a flexible body dialog boxes displays a Marker and Node table. It displays a list of markers on the rigid body that will be transferred to the flexible body. The Connections column identifies the names of constraints or forces that exist on the rigid body that you are replacing. The nodes on the flexible body that are nearest to the markers are listed in the Node ID column. The following figures show the Marker and Node table as it appears when you are replacing a rigid and flexible body. 19
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Building Flex Body Models - Kxcad.net

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