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Calibration for discrete element modelling of railway ballast: A review
Transportation Geotechnics ( IF 5.3 ) Pub Date : 2020-02-17 , DOI: 10.1016/j.trgeo.2020.100341
Yunlong Guo , Chunfa Zhao , Valeri Markine , Guoqing Jing , Wanming Zhai

The discrete element method (DEM) has been confirmed as an effective numerical method for modelling railway ballast, and successfully used to analyse a wide range of ballast-related applications (e.g. geomaterials). However, there still exists some aspects under development. Among them, the model calibration can be the most significant one (morphology, degradation and contact model). Because reliable and accurate results can be obtained only when the parameters are carefully selected. Therefore, diverse DEM applications and developments in railway ballast are critically reviewed. Furthermore, the model calibration methods are discussed. This is able to help future researchers improve the existing calibration methods, further, build more accurate, standardised and validated DEM models for ballast-related studies. Additionally, this paper can assist researchers to choose an appropriate model for specific applications.



中文翻译:

铁路道ast离散元建模的标定:综述

离散元法(DEM)已被确认为建模铁路道ast的有效数值方法,并已成功用于分析与道ast有关的各种应用(例如,土工材料)。但是,仍存在一些正在开发中的方面。其中,模型校准可能是最重要的一种(形态,退化和接触模型)。因为只有仔细选择参数,才能获得可靠而准确的结果。因此,对铁路道ast中各种DEM的应用和发展进行了严格的审查。此外,讨论了模型校准方法。这能够帮助未来的研究人员改善现有的校准方法,进一步为镇流器相关研究建立更准确,标准化和经过验证的DEM模型。另外,

更新日期:2020-02-17
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