Abstract
In a previous paper, the first author proposed an experimental identification technique for boundary conditions of a circular plate for the axisymmetrical case. In that paper, the boundary conditions were assumed to be linear. In this paper, an attempt is made to generalize the technique so that it can be applied to the case in which the boundary conditions are nonlinear. The main procedures of the proposed technique are (1) determining the displacement in an analytical form by combining experimental data with the theoretical solution, and (2) determining the boundary conditions by using the principle of harmonic balance. Numerical simulation is conducted. It is confirmed that (1) the proposed technique determines the boundary conditions when noises are small and that (2) use of data of strains in addition to those of displacements improves accuracy.
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