岩土颗粒多层次多分散几何形态的控制生成与离散元模拟
Generation and discrete element modelling of multilevel-polydisperse shape distributions in geotechnical particles
摘要
Abstract
Granular materials(such as sand,gravel,and ballast et al.)are widely used in geotechnical engineering,and understanding the mechanisms that influence their physical and mechanical properties is crucial for engineering practice.Numerous studies have shown that the macroscopic mechanical behavior of granular materials is closely related to geometric morphology of individual particles.However,existing studies mainly focus on single shape parameters and are often limited to monodisperse distributions.To address this,this study first establishes a comprehensive quantification framework for multilevel-polydisperse shape distributions based on the shape quantifications of realistic geotechnical particle assemblies.Subsequently,this study systematically develops methods that independently control polydisperse distributions of particle shape at each morphological level based on computational geometry theory.Finally,the effectiveness of the proposed particle generation methods is validated through discrete element simulations of isotropic compression tests.The simulation results indicate that the polydisperse distribution characteristics significantly affect the initial packing density and mean coordination number of the samples,regardless of the morphological level.This study provides a basis for systematically investigating the effects of multilevel-polydisperse shape distributions on the physical and mechanical properties of granular materials.关键词
岩土颗粒/多层次几何形态/多分散分布/颗粒生成/离散元模拟Key words
geotechnical particle/multilevel morphology/polydisperse distribution/particle generation/discrete element method分类
建筑与水利引用本文复制引用
樊猛,苏栋,张宁,蔡国军,陈湘生..岩土颗粒多层次多分散几何形态的控制生成与离散元模拟[J].岩土工程学报,2026,48(2):291-300,10.基金项目
国家自然科学基金项目(52278364,52508363) （52278364,52508363）
安徽省自然科学基金水科学联合基金重点项目(2408055US003) （2408055US003）
安徽省自然科学基金青年项目(2508085QE199) （2508085QE199）
国家资助博士后研究人员计划(GZC20252116) （GZC20252116）
安徽省教育厅重点科研项目(2025AHGXZK30562) （2025AHGXZK30562）
安徽建筑大学校引进人才(博士后)专项项目(2025QDHZ03)This work was supported by the National Natural Science Foundation of China(Grant Nos.52278364,52508363),Anhui Provincial Natural Science Foundation Key Project of Joint Fund for Water Science(Grant No.2408055US003),Anhui Provincial Natural Science Foundation(Grant No.2508085QE199),the Postdoctoral Fellowship Program of CPSF(Grant No.GZC20252116),the Key Research Project of Anhui Provincial Department of Education(Grant No.2025AHGXZK30562),and the Special Project for Talent Introduction(Postdoctoral)at Anhui Jianzhu University(Grant No.2025QDHZ03). （博士后）
