WAVELET-BASED STOCHASTIC SEISMIC RESPONSE OF A DUFFING OSCILLATOR

This paper presents formulation for the non-stationary response of a Duffing oscillator under a seismic excitation process. The excitation process is assumed to be characterized through wavelet coefficients and the non-linear system is replaced by a stochastic equivalent linear system with time-varying parameters. An example ground motion process has been used to show that the proposed approach gives accurate response estimates in case of mildly non-linear systems.