A calibration method of discrete element contact model parameters for bulk materials based on experimental design method

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2023-07-01 DOI:10.1016/j.powtec.2023.118596

Peng Bu , Yanlong Li , Xin Zhang , Lifeng Wen , Wen Qiu

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引用次数: 2

Abstract

This study proposes a method to address the issues of large amount of calculation and low efficiency in the calibration of discrete element method (DEM) contact model parameters for rockfill, which is based on the experimental design method. Plackett-Burman design method was used to analyze the significance of each contact model parameter to the macro-mechanical parameters. Second-order response surface regression models were developed to analyze the relationship between macro-mechanical parameters and contact model parameters that have significant impact on them. The contact model parameters in the rockfill DEM were calibrated using a multi-objective optimization method based on laboratory triaxial tests. The calibrated parameters were then used to simulate discrete element triaxial tests of the rockfill under varying pressure conditions. The study demonstrates that calibrated parameters can accurately predict the macroscopic behavior of rockfill under different confining pressures. Additionally, the calibration method has good applicability and effectiveness.

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基于实验设计法的散状材料离散元接触模型参数标定方法

针对堆石料离散元法(DEM)接触模型参数标定中计算量大、效率低的问题，提出了一种基于试验设计方法的方法。采用Plackett-Burman设计方法分析了各接触模型参数对宏观力学参数的意义。建立二阶响应面回归模型，分析宏观力学参数与对宏观力学参数影响较大的接触模型参数之间的关系。采用基于室内三轴试验的多目标优化方法对堆石料DEM中的接触模型参数进行了标定。利用标定后的参数，模拟了堆石料在变压条件下的离散元三轴试验。研究表明，标定后的参数能够准确预测不同围压下堆石体的宏观特性。该方法具有良好的适用性和有效性。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.

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