THE RESPONSE OF NONLINEAR-SYSTEMS TO MODULATED HIGH-FREQUENCY INPUT

We study the response of a single-degree-of-freedom system with cubic nonlinearities to an amplitude-modulated excitation whose carrier freq uency is much higher than the natural frequency of the system. The onl y restriction on the amplitude modulation is that it contain frequenci es much lower than the carrier frequency of the excitation. We apply t he theory to different types of amplitude modulation and find that res onant excitation of the system may occur under some conditions.