Determining the Mechanical Characteristics of Nonlinearly Elastic Materials by Vibrational Tests

摘要

The equations of free vibration of a nonlinear system are solved numerically by the fourth-order Runge-Kutta method on the basis of vibrational tests of a rigidly fixed PVC cantilever beam. The solution is optimized by the Nelder-Mead method in terms of the key parameters. The dissipation and nonlinearity of the material are determined.