Using three-dimensional finite element analysis in time domain to model railway-induced ground vibrations

被引:71
作者
Kouroussis, G. [1 ]
Van Parys, L. [2 ]
Conti, C. [1 ]
Verlinden, O. [1 ]
机构
[1] Univ Mons UMONS, Fac Engn, Dept Theoret Mech Dynam & Vibrat, B-7000 Mons, Belgium
[2] Univ Mons UMONS, Fac Engn, Dept Civil Engn, B-7000 Mons, Belgium
关键词
Railway ground vibrations; Finite/infinite element method; Viscous boundary; Vehicle dynamics; Soil-structure interaction; Finite element analysis; HIGH-SPEED TRAINS; DYNAMIC-RESPONSE; NUMERICAL-MODEL; MOVING LOAD; BORNE VIBRATIONS; INFINITE ELEMENT; HALF-SPACE; TRACK; SOIL; PROPAGATION;
D O I
10.1016/j.advengsoft.2014.01.005
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
For the prediction of ground vibrations generated by railway traffic, finite element analysis (FEA) appears as a competitive alternative to simulation tools based on the boundary element method: it is largely used in industry and does not suffer any limitation regarding soil geometry or material properties. However, boundary conditions must be properly defined along the domain border so as to mimic the effect of infinity for ground wave propagation. This paper presents a full three-dimensional FEA for the prediction of railway ground-borne vibrations. Non-reflecting boundaries are compared to fixed and free boundary conditions, especially concerning their ability to model the soil wave propagation and reflection. Investigations with commercial FEA software ABAQ US are presented also, with the development of an external meshing tool, so as to automatically define the infinite elements at the model boundary. Considering that ground wave propagation is a transient problem, the problem is formulated in the time domain. The influence of the domain dimension and of the element size is analysed and rules are established to optimise accuracy and computational burden. As an example, the structural response of a building is simulated, considering homogeneous or layered soil, during the passage of a tram at constant speed. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:63 / 76
页数:14
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