基于 PFC3D 的砂卵石土三轴试验介观参数校准方法

IF 2.9 3区 工程技术 Q2 ENGINEERING, CIVIL Frontiers of Structural and Civil Engineering Pub Date : 2024-01-13 DOI:10.1007/s11709-023-0028-4
Pengfei Li, Xiaopu Cui, Yingjie Wei, Junwei Xia, Xinyu Wang
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引用次数: 0

摘要

本文提出了一种快速有效的砂卵石土三维颗粒流代码(PFC3D)模型中观参数校准方法。该方法基于一系列数值试验,并考虑了中观参数对宏观参数的重要影响。首先,通过五个实施步骤进行了数值模拟。然后,采用多因素方差分析法对试验结果进行分析,选出对宏观响应有显著影响的中观参数,并通过多元线性回归估计其与宏观响应的线性关系。最后,将参数校准问题转化为多目标函数优化问题。数值模拟结果与实验室结果在定性和定量方面都非常吻合。该研究结果可为研究砂卵石土壤力学行为的微观参数校准提供依据。
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Calibration method of mesoscopic parameter in sandy cobble soil triaxial test based on PFC3D

This paper presents a rapid and effective calibration method of mesoscopic parameters of a three-dimensional particle flow code (PFC3D) model for sandy cobble soil. The method is based on a series of numerical tests and takes into account the significant influence of mesoscopic parameters on macroscopic parameters. First, numerical simulations are conducted, with five implementation steps. Then, the multi-factor analysis of variance method is used to analyze the experimental results, the mesoscopic parameters with significant influence on the macroscopic response are singled out, and their linear relations to macroscopic responses are estimated by multiple linear regression. Finally, the parameter calibration problem is transformed into a multi-objective function optimization problem. Numerical simulation results are in good agreement with laboratory results both qualitatively and quantitatively. The results of this study can provide a basis for the calibration of microscopic parameters for the investigation of sandy cobble soil mechanical behavior.

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来源期刊
CiteScore
5.20
自引率
3.30%
发文量
734
期刊介绍: Frontiers of Structural and Civil Engineering is an international journal that publishes original research papers, review articles and case studies related to civil and structural engineering. Topics include but are not limited to the latest developments in building and bridge structures, geotechnical engineering, hydraulic engineering, coastal engineering, and transport engineering. Case studies that demonstrate the successful applications of cutting-edge research technologies are welcome. The journal also promotes and publishes interdisciplinary research and applications connecting civil engineering and other disciplines, such as bio-, info-, nano- and social sciences and technology. Manuscripts submitted for publication will be subject to a stringent peer review.
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