Numerical Investigation of Road Response to Dynamic Vibration of Machine Foundation

Investigating the effects of machine and the vibrational effects created on its subsoil, especially on road surfaces, is one of the most important issues in soil dynamics. In this study, the foundation behavior on the road surface, which has been affected by vibration with a range of 10 and 20 kN/m2 and a frequency of 10 and 20 Hz, has been investigated. The ground response at different points in both dry and saturated states and in two states without damping and with Rayleigh damping was investigated at different distances from the foundation. Two-dimensional Finite Element software (PLAXIS) has been used for numerical analysis. The results of numerical analysis have shown that by increasing the frequency and amplitude of the vibration up to twice, the maximum values of displacement, maximum speed and maximum acceleration on the road surface will be doubled. However, when only the applied frequency is doubled and the amplitude value does not change, the displacement and velocity changes in the soil are not very significant. However, the rate of acceleration changes in the soil is doubled. This indicates the effect of frequency on the rate of acceleration.