Nose and Camera Freeform

Once you have separated the nose from the remainder of the fuselage, you separate it from the camera collar. To do this, create sheet bodies for the nose surfaces.

You can use these sheet bodies to improve the nose shape. Whilst performing the surface freeform on the nose, constrain the camera bay edge. Constraining the edge ensures the edge does not deform along with the nose surface, allowing you to reconnect the camera system to the main body, without further modifications.
  1. To convert the solid faces into sheet bodies:
    1. In the Visualization toolbar, click (Save-Restore-Select Views) and select Views > -Z > Up +Y.
    2. In the 3D-CAD View 1 scene, select the two faces around the camera bay as shown below:


    3. Right-click one of the selected faces and select Create Sheet Bodies.
    4. In the Create Sheet Bodies dialog, click OK.
      In the original geometry the main body included the collar for the camera and gimble. The sheet body in this instance separates the nose surfaces from the collar surfaces and produces two separate bodies.
  2. Right-click the Body Groups > Body > Main Body 2 node, and select Hide.
  3. Reselect the previously selected faces.
  4. Right-click one of the selected faces and select Delete Faces.
  5. In the Delete Faces dialog, click OK.
  6. In the 3D-CAD View scene, right-click anywhere in the scene and select Restore > Hidden Bodies.
  7. Reselect the Main Body 2 faces.
  8. Right-click one of the selected faces and select Freeform Surface.
  9. In the Freeform Surface dialog, click (Display Interior Edge Constraints).
  10. Select the two constraints on the camera bay edge, as shown below, and set Edge Constraint to Rigid.


    The rigid constraints maintain the shape of the edge when you deform the body. When you perform the deformation, do not make changes to the camera bay geometry as the collar and the camera bay fit within the nose.

  11. Click (Create Point) and place four points on the surfaces as shown below:


  12. To define the nose freeform displacements:
    1. Click FreeFormPoint 1 and set Displacement to [0.075, 0.0, 0.02] m,m,m.
    2. Click Apply.
    3. Click FreeFormPoint 2 and set Displacement to [-0.15, 0.0, -0.18] m,m,m.
    4. Click Apply.
    5. Click FreeFormPoint 3 and set Displacement to [-0.2, 0.0, -0.1] m,m,m.
    6. Click Apply.
    7. Click FreeFormPoint 4 and set Displacement to [-0.15, 0.0, -0.18] m,m,m.
    8. Click Apply.


  13. To translate the camera module:
    1. Reselect FreeformPoint 3 and select (Design Parameter).
    2. In the Design Parameter dialog, set the following properties and click OK:
      Property Setting
      Expose Parameter Activated
      Name CameraDisplacement

      The parameter you create allows you to relocate the camera structure to its new location whilst providing an exact match to the edge of the camera bay.

    3. In the Surface Freeform dialog, click OK.
    4. Multi-select the Body Groups > Camera > Camera, Gimble, and Body > Main Body 3 nodes.
    5. Right-click one of the selected nodes and select Transform > Translate.
    6. In the Translate Bodies dialog, set Translation Vector to $$CameraDisplacement and click OK.
  14. To form a solid body from the sheet bodies:
    1. Multi-select the Body > Main Body, Main Body 2, and Main Body 3 nodes.
    2. Right-click one of the selected nodes and select Sew.
    3. In the Sew Sheet Bodies dialog, set Sewing Tolerance to 1.0E-4 and click OK.

      The sew body operation allows you to create one closed solid body for all the sheet bodies previously created.



  15. Group the six most recent features, as shown below:


  16. Rename Features Group to Nose and Camera.
  17. Save the simulation.