Coupled DEM-FDM study on the dynamic performance of ballast-subgrade system under cyclic axle loading

IF 5.5 2区工程技术 Q1 ENGINEERING, CIVIL

Transportation Geotechnics Pub Date : 2025-09-22 DOI:10.1016/j.trgeo.2025.101737

Ting Li , Yuqin Gao , Yi Zhong , Peng Xu , Guangqing Yang

引用次数: 0

Abstract

The coupled Discrete Element Method − Finite Difference Method (DEM-FDM) offers a useful approach for comprehensively investigating the micro–macro behavior of ballast-subgrade systems. Previous research primarily focused on the mechanical characteristics of ballast particles, with subgrade response seldom reported simultaneously under cyclic axle loading. This study employs the coupled DEM-FDM method to investigate the dynamic response of the ballast-subgrade system under cyclic axle loading. The movement, contact force, and energy dissipation of the ballast, combined with the stress and settlement of the subgrade, were analyzed in detail to comprehensively understand the influence of axle load magnitude on system behavior.

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循环轴载作用下压载路基系统动力性能的DEM-FDM耦合研究

耦合离散元法-有限差分法（DEM-FDM）为全面研究压载路基系统的微观-宏观行为提供了一种有用的方法。以往的研究主要集中在压载物颗粒的力学特性上，很少有关于循环轴载作用下路基同时响应的报道。采用DEM-FDM耦合方法研究了循环轴载作用下压载路基系统的动力响应。详细分析了道砟的运动、接触力和耗能，并结合路基的应力和沉降，全面了解轴载大小对系统性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.