Abstract
Experimental results are presented on effects of a concentrated mass on chaotic vibrations of a clamped circular plate. The plate has the characteristics of a softening-and-hardening spring with snap-through. Under periodic excitation, predominant chaotic response with dynamic snap-trough is generated in a typical frequency region. The response is inspected by the Fourier spectrum, the Poincare projection, the maximum Lyapunov exponents and the principal component analysis. As the effects of the mass, the chaotic response is generated in the lower frequency region. Furthermore, the contribution ratio of the modal configuration, which corresponds to the lowest mode of vibration, shows slight increase.
