Hi,
Have you tried creating either an Elliptical Hyperboloid (ehy) or an Elliptical
Paraboloid (epa) in BRL CAD?
Cheers,
Philippe
> Le 13 oct. 2014 à 17:08, Cook, Kathy <[email protected]> a écrit :
>
> I am looking for suggestions on the best way to model a nose cone section
> that is formed as a tangent ogive (or any other ogive shape for that matter).
> There would be an outside ogive solid and an inside ogive solid subtracted
> from it to form the nose cone skin. For a tangent ogive, the base would be
> tangent to a following cylindrical component with radius, R, and the nose
> cone would have a length, L. The ogive shape is defined by an ogive radius,
> p, whose origin is at the base and p>= R. (note these formulas are from
> Wikipedia, Nose_cone_design)
>
> p = (R^2 + L^2)/(2R)
>
> The shape is revolved around the centerline and the distance, y, from that
> axis to the surface is at any point, x, is:
> y=sqrt(p^2 – (L-x)^2) + R – p
>
> For my purposes, the centerline for revolution is the model x-axis and the
> tip of the outer nose cone would be at x=0, but I guess this would not be the
> case in general, but could be constructed that way and then the component
> (region) formed by subtracting the two ogives translated/rotated to its
> location in the overall model, if that is possible.
>
> So, what would be the best way to go about this and get a relatively smooth
> surface?
>
> Thanks,
>
> Kathy
>
>
>
>
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