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bmozley1-Visitor
1-Visitor
July 12, 2010
Question

Elipse

  • July 12, 2010
  • 1 reply
  • 1101 views
Pro E users,

How do you create a elliptical dome? Where the base of the shape is an
ellipse.

Brad
WF3

    1 reply

    P
    ptc-8104501-Visitor
    1-Visitor
    July 12, 2010
    Hi Brad,
    This works in WF5 and I see no reason why it won't work for WF3:

    - create a sketched curve of the base of the dome (an ellipse)
    - create a sketched curve of a circle of known diameter (D) at the centre
    of your ellipse
    - create a variable section sweep selecting the circle as Origin and the
    elliptical curve as Chain 1
    (Embedded image moved to file: pic15257.gif)

    - Use a sketch as shown below. In my example the diameter of my circle was
    10 so the dimension '5' is the radius of the circle. It ensures the dome
    meets in the middle (if you selected the elliptical curve as your origin
    you would not be able to do this - you would either have an elliptical hole
    in the middle or a pretty four leaf clover overlap shape. The vertical
    centre line on the left goes through the point on Chain 1. The curve is a
    conic with a rho value of "sqrt(2)-1" as a relation. According to the ProE
    help files for conics you will see this defines it as an ellipse.
    (Embedded image moved to file: pic23158.gif)


    There may be an easier way to do it but I don't know how!

    --
    Mark von Huben

    Principal Mechanical Engineer
    Cochlear Ltd
    14 Mars Rd
    Lane Cove West, NSW, 2066
    Australia

    p +61 2 9425 5210



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