Fig. 1
Frequency as a function of twist (α). The curves are obtained by solving the eigenvalue problem in 1D. The dotted line represents the solution for the untwisted case. For this particular example, ρi/ρe = 3, p = 1/2, q = 3/2. The two sets of solutions are associated to m = 1 and k1 = π/50R (thick lines), and k2 = π/48R (thin lines).
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