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Figure 8.7.
Abacuses to determine the peak factor of a narrow-band process (numerical
calculation results of a harmonic oscillator stimulated by random noise)
8.5. Improvements to the modal method
Let us return to the seismic analysis problem.
What we said before will be used to rephrase the definition of seismic data,
namely the oscillator response spectra (ORS).
The seismic signal should be considered as a random process characterized by
average values suited to the response we are looking for, typically predicting the
collapse of the structure. According to the regulations and practice, the ORS
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