16 Q2

which determines the execution parameter for the Sphe 3 correction.

The set up of the Cv 1 term for obtaining the right slope at the perimeter rm can be achieved by a vase form. This leads to determining the rigidity ratio y = D1/D2 = (t1 /t2)3 of the two rigidity zones with respect to Poisson's ratio and also the outerinner radii ratio b/rm = b/a of the ring. The geometrical condition balancing Cv 1 and Sphe3 modes for k = 3/2 is demonstrated in Sect. 7.6.1 (Lemaitre [25]). This condition, [see (7.47)], is

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