  This work studies the dynamics of a one dimensional elastic bar with random
elastic modulus and prescribed boundary conditions, say, fixed at one end, and
attached to a lumped mass and two springs (one linear and another nonlinear) on
the other extreme. The system analysis assumes that the elastic modulus has
gamma probability distribution and uses Monte Carlo simulations to compute the
propagation of uncertainty in this continuous--discrete system. After
describing the deterministic and the stochastic modeling of the system, some
configurations of the model are analyzed in order to characterize the effect of
the lumped mass in the overall behavior of this dynamical system.
