RESPONSE OF AN INFINITE TIMOSHENKO BEAM ON A VISCOELASTIC FOUNDATION TO A HARMONIC MOVING LOAD

The dynamic stiffness matrix of an infinite Timoshenko beam on viscoelastic foundation to a harmonic moving load is established. This dynamic stiffness matrix is essentially a function of the velocity and frequency of the harmonic moving load. The critical velocities and the resonant frequencies can be easily determined. The dynamic responses of a European high-speed railway subjected to a harmonic moving load are calculated as an example for demonstration and discussion.