When treating nonlinear oscillation problems by the Ritz-Galerkin method the approximating function is conventionally chosen as a sinusoid or a polynomial of sinusoids with their amplitudes as the open parameters. In this paper the advantages are pointed out that may be gained from choosing a nonsinusoidal approximating function that contains additional parameters related to the shape of the function.
Issue Section:Research Papers
Topics:Function approximation, Oscillations, Polynomials, Shapes
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