A fully resolved SPH-DEM for simulation of debris flows with arbitrary particle shapes impacting flexible barriers

IF 5.6 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-02-10 DOI:10.1007/s11440-025-02544-8

Hao Xiong, Mengjie Hao, Debo Zhao, Xiaoxuan Gan, Zhen-Yu Yin, Xiangsheng Chen

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引用次数: 0

Abstract

This study presents a fully resolved numerical method coupling framework for capturing the interaction between debris flows and flexible barriers. The proposed coupling method combines a simplified flexible wire representation, smoothed particle hydrodynamics (SPH), and discrete element method (DEM). Specifically, the flexible wire representation is used to represent a flexible barrier that intercepts debris flows. The coupled SPH-DEM simulates a two-phase debris flow containing arbitrarily shaped boulders. Additionally, a modified dynamic boundary method (mDBC) is employed to couple SPH with DEM. These three methods are strongly coupled to simulate the behavior of boulders in debris flows and improve the efficiency and accuracy of the interaction between flexible barriers and debris flows. The proposed coupling framework is evaluated through a series of verification instances, which are consistent with experimental observations. Subsequently, the impact dynamics of the two-phase debris flow on the flexible barrier is modeled and analyzed. Overall, the framework holds great potential for the design and optimization of flexible barriers for debris flow mitigation in engineering practice.

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模拟任意颗粒形状冲击柔性屏障的泥石流的全分辨SPH-DEM

本研究提出了一个完全解析的数值方法耦合框架，用于捕捉泥石流与柔性屏障之间的相互作用。所提出的耦合方法结合了简化柔性线表示、光滑粒子流体力学（SPH）和离散元法（DEM）。具体来说，柔性线表示用于表示拦截泥石流的柔性屏障。耦合SPH-DEM模拟了含任意形状巨石的两相泥石流。此外，采用改进的动态边界法（mDBC）对SPH与DEM进行耦合。这三种方法是强耦合的，以模拟泥石流中巨石的行为，提高柔性屏障与泥石流相互作用的效率和准确性。通过一系列验证实例对所提出的耦合框架进行了评估，验证结果与实验结果一致。随后，对两相泥石流对柔性屏障的冲击动力学进行了建模和分析。总体而言，该框架在工程实践中具有设计和优化柔性泥石流减缓屏障的巨大潜力。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.