Abstract
A model representing the dynamic interaction of infinite discontinuous floating-slab track and subsoil is established. The fundamental solution of subsoil is derived and numerically solved by the method of 2.5-dimensional thin layer method with perfectly matched layer, by which the dynamic stiffness to support the above track can be obtained. And thus the dynamic responses of a discontinuous floating-slab track generated by a constant moving load and by a harmonic moving load are derived analytically by the application of Fourier integral transformation, Floquet transformation, and Betti-Rayleigh Reciprocal Theorem. A numerical example is studied and the effects of discontinuous slab on dynamic responses of track are discussed.
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