1961 Volume 16 Issue 12 Pages 2537-2543
The solutions of the wave equation for a membrane bounded by fixed two eccentric circles are obtained. By the aid of the addition theorem of the Bessel functions, the boundary condition on two circles is reduced to a set of homogeneous simultaneous linear equations, from which eigenvalues and eigenfunctions are obtained in power series of d (the distance between two centers). Some numerical results are obtained to the order of d6 or d4.
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