Spanish term (edited): curvas generatrices y directrices son catenarias

Not the typo in the original: "curva" must be plural. In English it's more common to use director curve, the curve along which the generatrix moves to generate the surface. The translation would benefit from breaking free from a Spanish pattern, and the word "profile" does not apply at all:

The proposed form is a generated wireframe shell, where both the generatrix and the director curve are catenaries.

Note that generatrix already contains the "curve" element, so the noun curve is in the singular, as it refers only to the director curve.