Dynamic effect of a moving ring load on a cylindrical structure embedded in poroelastic space based on nonlocal Biot theory

Abstract The dynamic response of a cylindrical structure embedded in a saturated poroelastic medium, which is subjected to a moving ring load, is theoretically investigated based on nonlocal Biot theory. General solutions regarding the displacement, stress, and pore pressure in the terms of frequency and wavenumber domains are derived through Fourier transform. The solutions for the displacement, stress, and pore pressure in the time and space domains are obtained by using a double inverse Fourier transform. The effects of nonlocal parameter and load speed on the displacement fields are analyzed in detail. The effects of nonlocal parameter on the displacement are enhanced as the load speed increases. Self-vibration frequency of the applied moving load also has significant influence on the displacement and pore pressure. Results show that high self-vibration frequency can reduce the amplitude of the displacement and pore pressure. Furthermore, increasing the self-vibration frequency results in considerable effects of nonlocal parameter on the displacement and pore pressure.