Merging Gun Tube Model With Projectile Model

The process of merging the gun tube model with the projectile model requires that both the file containing the projectile (BALANS Tutorial_Start.pr3) and the file containing the gun tube (BALANS Tutorial_Gun_Tube.pr3) be open in two separate PRODAS Model editor windows. The steps to merge the two models for in-bore balloting analysis are as follows:

Copy the top level assembly in the gun tube model by highlighting the top level assembly and then clicking the copy icon.
In the model editor window containing our projectile, toggle the model type from "Projectile" to "ProdasTubeModel". This is a view used to store the gun tube model associated with this projectile. Balans knows to get the gun tube geometry from this Prodas TubeModel. The display will be blank and the model tree will contain a single, empty assembly.
Paste the top level assembly from the tube model into the empty assembly by clicking the paste icon, entering an assembly name, and clicking OK. It does not matter what you enter for the assembly name.

You can toggle back and forth between the Projectile type and the ProdasTubeModel type to see each model. Once the gun tube model has been merged it will only effect your Balans results. The basic PRODAS modules only look at the Projectile model.

As a matter of fact PRODAS does not provide a mechanism to study the mass properties of the model in the Prodas Tube Model view. That is why we build our gun tube model as a projectile, run mass properties and then copy the model in as described above. If you want to change the gun tube model in the future it is prudent

to go back to the original gun tube pr3 file and make the change
run mass properties to verify the new model
go back to the model editor with the projectile model
remove the original gun tube model
merge in the new gun tube model