Resonance of nonlinear oscillators in external electric field

The collective behavior of an array of nonlinear oscillators is studied. Th ey can be characterized by calculating two macroscopic quantities, the aver age velocity and the spatial correlation function. The resonant behavior of the average quantity has some similarity with that of a single oscillator. Two kinds of disorder are considered. The natural distribution of pendula lengths can result in different periodic behavior from that of identical os cillators and reduce the frictional coefficient. The impurity can completel y change the region of resonant behavior.