STABILITY OF A SIMPLY-SUPPORTED BEAM SUBJECTED TO RANDOMLY SPACED MOVING LOADS

Vibration problems of a simply-supported elastic beam subjected to randomly spaced moving loads with a uniform speed are treated under the assumption that the input load sequence is a Poisson process. In the case in which the inertial effect of moving loads is taken into account, the stability problem relating to the speed and the mass of loads is dealt with, considering the inertia force, the centrifugal force, and the Coriolis force of the moving loads. As an analytical result a stability chart of the mean-squared deflection is obtained for the moving speed and the moving masses.