PROPAGATION OF NONSTATIONARY RANDOM WAVES ALONG SUBSTRUCTURAL CHAINS

Propagation of non-stationary random waves along hysteretically damped repetitive structures is investigated numerically, by extending recently developed theory. It is proved that symplectic mathematics combined with the pseudo-excitation method gives efficient solutions not only for stationary random excitations, but also for non-stationary random excitations. The numerically computed time-dependent variance curves of the displacement and internal force responses at different stations of a substructural chain are given as an example. (C) 1995 Academic Press Limited.