沈阳砂卵石地层离散元仿真参数标定

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摘要 研究目的：在开展基于离散元的盾构-砂卵石相互作用仿真分析中,存在实际砂卵石参数与离散元模拟参数不匹配问题,为解决此问题,需要对沈阳地铁3号线甘官站—千岛湖街站区间（简称“甘千区间”）实际施工地层的砂卵石进行物理试验和仿真试验,以堆积角为响应值,分别进行Plackett-Burman试验设计和Box-Behnken试验设计,标定离散元仿真分析所需的仿真参数,为盾构-砂卵石相互作用仿真分析提供依据。
研究结论：（1）物理试验得到砂卵石粒度分布、密度1 719 kg/m³、堆积角38.68°;（2）Plackett-Burman试验设计,筛选出对砂卵石堆积角影响显著因素为：砂卵石-砂卵石静摩擦系数、砂卵石-砂卵石滚动摩擦系数、砂卵石-盾构机滚动摩擦系数;（3）通过Box-Behnken试验设计,建立堆积角与显著性因素之间的回归模型,反演出最佳仿真参数为：砂卵石-砂卵石静摩擦系数0.599、砂卵石-砂卵石滚动摩擦系数0.195、砂卵石-盾构机滚动摩擦系数0.033;（4）本研究成果可应用于盾构机离散元仿真分析。

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	何恩光
	赵文超
	齐鹏
	周鹏

关键词 ：砂卵石, 堆积角, 离散元, 试验设计, 参数标定

Abstract：Research purposes: In the process of conducting discrete element-based simulation analysis of the interaction between shield machines and sandy cobblestones, there is a mismatch between the actual sandy cobblestone parameters and the simulation parameters of the discrete element method. To address this issue, it is necessary to conduct physical and simulation tests on the sandy cobblestones from the actual construction stratum of the Ganguan Station-Qiandaohu Street Station (referred to as Gan-Qian Section) section of Line 3 of the Shenyang Metro. By taking the angle of repose as the response value, Plackett-Burman and Box-Behnken experimental designs were carried out to calibrate the simulation parameters required for discrete element simulation analysis, providing a basis for the simulation analysis of the interaction between shield machines and sandy cobblestones.
Research conclusions: (1) Physical experiments measured the particle size distribution, the density of 1 719 kg/m³, and the accumulation angle of 38.68°. (2) Plackett-Burman experimental design, and screened out the factors that have a significant influence on the accumulation angle of sand gravel: sand gravel-sand gravel static friction coefficient, sand-gravel-sand gravel rolling friction coefficient, sandstone-shield machine rolling friction coefficient (3) Box-Behnken experimental design, establish a regression model between the accumulation angle and the significance factor, and the inverted optimal simulation parameters are: the static friction coefficient of sand pebble is 0.599, the rolling friction coefficient of sand pebble-sand pebble is 0.195, and the rolling friction coefficient of sand pebble-shield machine is 0.033. (4) The research results can be applied to the discrete element simulation analysis of shield tunneling machines.

Key words： sand gravel repose angle discrete elements experimental design parameter calibration

收稿日期: 2023-07-07

PACS:	U455.3+1
	U25

基金资助:国家自然科学基金（62173238）

作者简介: ** 何恩光,1965年出生,男,教授级高级工程师。

引用本文:

何恩光, 赵文超, 齐鹏, 周鹏. 沈阳砂卵石地层离散元仿真参数标定[J]. 铁道工程学报, 2024, 41(11): 7-11.
HE Enguang, ZHAO Wenchao, QI Peng, ZHOU Peng. Calibration of Discrete Element Simulation Parameters of Shenyang Sand and Gravel Formation. Journal of Railway Engineering Society, 2024, 41(11): 7-11.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2024/V41/I11/7

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