Behaviour of non-ballast pre-stressed and precast track structures in high speed railway based on multiscale finite element model

Yuhang Wang , Jijun Wang , Qi Tang , Jike Tan , Guobing Lu
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Abstract

In order to make further study on the mechanical property of CRTSIII type slab non-ballast track structures, which was self-designed in China, based on the method of the multiscale finite element model (FEM), the traditional FEM of slab non-ballast track structures was improved. The multiscale FEM of CRTSIII type slab non-ballast track structures was established based on the general finite element program ABAQUS. Then the comparative calculation was made between various FEMs, showing that the high solution precision, fast modelling speed and high solution efficiency could be obtained. Therefore, the multiscale FEM was suitable for the parametric study on mechanical behaviour of CRTSIII type slab non-ballast track structures, and then the key influence factor and constructions could be optimized.

基于多尺度有限元模型的高速铁路无砟预应力和预制轨道结构性能研究
为了进一步研究自主设计的CRTSIII型板式无碴轨道结构的力学性能,基于多尺度有限元模型(FEM)方法,对板式无碴轨道结构的传统有限元方法进行了改进。基于通用有限元程序ABAQUS,建立了CRTSIII型板式无砟轨道结构的多尺度有限元分析。在此基础上,对不同的有限元模型进行了对比计算,结果表明该方法具有较高的求解精度、较快的建模速度和较高的求解效率。因此,多尺度有限元法适用于对CRTSIII型板式无砟轨道结构的力学性能进行参数化研究,从而对关键影响因素和结构进行优化。
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