Dynamic displacements of an infinite beam on a poroelastic half space due to a moving oscillating load |
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Authors: | Bo Jin |
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Institution: | (1) Key Laboratory of Solid Mechanics of MOE, Department of Engineering Mechanics Tongji University, 200092 Shanghai, P.R. China |
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Abstract: | This investigation is concerned with the dynamic displacements of a beam on a poroelastic half space under a periodic oscillating
load of constant velocity. The governing equations for the proposed analysis are solved using Fourier transform. The expression
for the vertical displacement is obtained according to the contact condition between a beam and a half space. The effects
of the moving velocity and vibration frequency of the load on the dynamic displacement are considered in the numerical examples.
The results show that the load velocity has significant influence on dynamic displacement. It is also noted that large differences
exist between the dynamic responses for a beam on a poroelastic half space and on an elastic half space when the load velocity
is larger than the shear wave speed of the medium.
The reported work is supported by the National Natural Science Foundation of China (Project No. 10372073). |
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Keywords: | Moving load Poroelastic half space Infinite beam Dynamic response High speed railway |
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