Benchmarking of two three-dimensional numerical models in time/space domain to predict railway-induced ground vibrations

An Evaluation and Reduction Approach for the Ground Vibration Induced by High Dam Flood Discharge

“…W mn F mn (11) In order to obtain the analytical expression of the time function T mn (t), the flow excitation q(x, y, t) is rewritten as follows:…”

“…As for the mechanism of ground vibrations, there are several studies on ground vibration induced by excitations such as seismic effect [10], railway [11], pile driving [12], etc., but research into the mechanism of ground vibration induced by flood discharge is still in the initial stage. Based on the results of prototype monitoring, researchers [7] have summarized that this type of ground vibration is a continuous stationary random dynamic response characterized by low frequency, small amplitude, shock characteristics, and longdistance propagation.…”

Predicting Railway Track Displacements With the Hardening Soil Small Strain Model Near Critical Speed

“…4 and as can be seen it corresponds to a symmetric case, so that only half of it has been modeled. The dimensions of the model are 70x40x30 m in the longitudinal, horizontal and vertical directions respectively, which are values considered and experimentally validated in 3D models of finite elements formulated in the time domain similar to those used here [16,[18][19][20][21]. The railpad is modeled as a linear spring, whereas the rail has been simulated as a beam, with the normalized properties of the UIC-60 type.…”