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Dynamic 3‐D soil–railway track interaction by BEM–FEM
Author(s) -
Mohammadi Mohsen,
Karabalis Dimitris L.
Publication year - 1995
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290240902
Subject(s) - finite element method , structural engineering , track (disk drive) , transient (computer programming) , quadrilateral , vibration , boundary element method , viscoelasticity , engineering , frequency domain , overlay , half space , soil structure interaction , mathematical analysis , acoustics , computer science , physics , mathematics , mechanical engineering , thermodynamics , programming language , operating system
A study on the dynamic response of a railway track is presented via a 3‐D formulation based on the frequency domain Boundary Element Method (BEM) and the Finite Element Method (FEM). The railway track consists of a group of surface, massive, rigid footings resting on a viscoelastic half‐space and connected by an overlaying rail structure. The BEM, employing the full‐space fundamental solutions and quadrilateral elements, is used for the simulation of the elastic half‐space while the FEM is used to model the rigid footings and the rail superstructure. The loading function consists of a set of externally applied, harmonic or transient loads. Frequency as well as transient, by way of FFT, results are presented for various modes of vibration. Various numerical studies assess the through‐the‐soil interaction of the adjacent footings, the influence of soil damping, the effect of the overlaying structure on the frequency content of the system, and the effective simulation of an infinitely long railway track by a truncated one.