Predicting response spectra for earthquake signals generated as filtered noise

Generating families of earthquake signals which in mean fulfill a given response spectrum can be done by filtering white noise through a linear filter and multiplying the filtered signal with a time-window function. To design the filters, the response spectrum of the filtered white noise sequences must be predicted. In the past years several methods for doing this have been suggested. s article, we have modified some of these methods and also proposed a new method. We have compared the methods by doing simulations. It was found that the proposed method was useful for predicting response spectra of signals with slow decaying time-window functions. A further benefit of the proposed method is that it could be used for predicting response spectra with time varying frequency content.