Quantification of the contribution ratio of relevant input parameters on DEM-based granular flow simulations

IF 3.3 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL Soils and Foundations Pub Date : 2023-10-21 DOI:10.1016/j.sandf.2023.101378
Junsen Xiao , Kenta Tozato , Shuji Moriguchi , Yu Otake , Kenjiro Terada
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Abstract

Granular flow is affected by multiple parameters, which makes its study challenging. The discrete element method (DEM) is widely employed to simulate granular flow in consideration of particle motion, particularly when the effects of related parameters and particle shape on flow characteristics are being studied. In this study, different combinations of four input parameters (spring coefficient, friction angle between elements, coefficient of restitution, and bottom friction) were first obtained with the help of the Latin hypercube sampling method. Then, a series of simulations were performed using DEM with different sets of input parameters in consideration of different particle shapes and contact models. Radial basis function (RBF) interpolation was then employed to construct a response surface of run-out distance. Monte Carlo simulations were also conducted to obtain the contribution ratio of each input parameter. The result revealed that the bottom friction has a significant influence on the run-out distance, while friction angle between elements and spring coefficient account for a small proportion in the contribution ratio. Moreover, it was confirmed that the coefficient of restitution has a considerable contribution ratio in the front part of elements. The results also revealed that the influence of the particle shape and contact model on the contribution ratio was not as important in comparison.

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基于dem的颗粒流模拟中相关输入参数的贡献率量化
颗粒流动受到多种参数的影响,这给颗粒流动的研究带来了挑战。离散元法(DEM)被广泛用于考虑颗粒运动的颗粒流模拟,特别是在研究相关参数和颗粒形状对流动特性的影响时。本研究首次采用拉丁超立方体采样方法,获得了弹簧系数、单元间摩擦角、恢复系数和底部摩擦这四个输入参数的不同组合。然后,考虑不同的颗粒形状和接触模型,使用不同输入参数的DEM进行了一系列模拟。然后利用径向基函数(RBF)插值构造跳动距离响应面。并进行了蒙特卡罗模拟,得到了各输入参数的贡献率。结果表明,底部摩擦对跳动距离有显著影响,而元件间摩擦角和弹簧系数在贡献率中所占比例较小。此外,还证实了恢复系数在元件前部有相当大的贡献率。结果还表明,颗粒形状和接触模型对贡献率的影响相对较小。
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来源期刊
Soils and Foundations
Soils and Foundations 工程技术-地球科学综合
CiteScore
6.40
自引率
8.10%
发文量
99
审稿时长
5 months
期刊介绍: Soils and Foundations is one of the leading journals in the field of soil mechanics and geotechnical engineering. It is the official journal of the Japanese Geotechnical Society (JGS)., The journal publishes a variety of original research paper, technical reports, technical notes, as well as the state-of-the-art reports upon invitation by the Editor, in the fields of soil and rock mechanics, geotechnical engineering, and environmental geotechnics. Since the publication of Volume 1, No.1 issue in June 1960, Soils and Foundations will celebrate the 60th anniversary in the year of 2020. Soils and Foundations welcomes theoretical as well as practical work associated with the aforementioned field(s). Case studies that describe the original and interdisciplinary work applicable to geotechnical engineering are particularly encouraged. Discussions to each of the published articles are also welcomed in order to provide an avenue in which opinions of peers may be fed back or exchanged. In providing latest expertise on a specific topic, one issue out of six per year on average was allocated to include selected papers from the International Symposia which were held in Japan as well as overseas.
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