Identification of mechanical characteristics of nonlinear elastic material on vibration tests results
Basing on the vibration tests results of rigidly fixed cantilever beam form hard polyvinylchloride, the numerical solution for the equation of free vibrations of nonlinear system by quartic Runge-Kutta method is obtained. The solution is optimized by Nelder-Mead method on key parameters. The dissipation and nonlinearity parameters of the material are determined.