抄録
In this paper, out-of-plane motion of a string which is fixed at one end and harmonically excited at the other end is examined, when the excitaion frequency is in the neighborhood of one third the first natural frequency of the string. The frequency response curve is experimentally described and the bifurcation characteristics are also discussed depneding on the excitation amplitude. Using the governing equation of motion, it is theoretically shown that the non-planer motion is induced through the combination of two kinds of nonlinear resonances, i.e., superhamonic resonance and internal resonance.
