土壤干缩开裂和卷曲分析的数值模型与若干进展Ⅱ:无网格粒子类方法与混合数值模型  

Advances in numerical model of soil desiccation cracking and curlingⅡ:Meshfree and particle-based numerical methods and peridynamics

作　　者：章青[1] 刘攀勇 顾鑫[1] 乔延赫 ZHANG Qing;LIU Panyong;GU Xin;QIAO Yanhe(College of Mechanics and Engineering Science,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学力学与工程科学学院,江苏南京211100

出　　处：《水利学报》2025年第2期145-158,共14页Journal of Hydraulic Engineering

基　　金：国家自然科学基金项目(12472200,12172121,12002118);湖南省水利科技项目(XSKJ2023059-16)。

摘　　要：土壤干缩开裂和卷曲容易引发各种潜在的自然灾害,是学术界和工程界长期关注的问题。土壤干缩开裂和卷曲的物理力学机制极为复杂,影响因素众多,理论分析和试验研究很难再现实际环境下土壤干缩开裂和卷曲过程。虽然基于网格类的数值方法在该问题的研究中已取得一系列研究成果,但由于网格类数值方法在求解开裂问题的固有缺陷,该问题的求解仍然存在诸多困难。无网格粒子类方法在解决开裂、大变形等问题方面具有独特优势,近年来得到迅速发展,也在土壤干缩开裂和卷曲问题得到了应用。本文综述了无网格粒子类方法与各种混合数值模型在该领域的主要进展,重点介绍了本文作者构建的用于土体干缩开裂和卷曲分析的近场动力学数值模型以及相关研究成果。研究结果表明,近场动力学方法是分析土体干缩开裂和卷曲问题的一种有效方法,但土体干缩开裂和卷曲问题的数值建模和计算分析仍面临诸多挑战,未来可在热-水-化-力等多物理场耦合分析的数值模型、土体弹塑性本构关系、土体干缩开裂和卷曲的多尺度模拟、考虑土体性能参数的演化和复杂边界条件,以及发展高精度高效率的数值算法等方面开展进一步的研究。Soils desiccation cracking and curling can potentially trigger natural disasters,making it a long-standing issue of concern in both academic and engineering fields.However,the physical processes and mechanical mechanisms underlying desiccation cracking and curling are complex,with numerous influencing factors,posing significant challenges for the accurate replicate of the whole processes based on the theoretical and experimental analysis.Although mesh-based methods have made significant research progress,cracking issues continue to pose challenges due to their intrinsic limitations.Meshfree and particle-based methods offer unique advantages in describing cracking phenomena and have been increasingly developed in recent years for analyzing soil desiccation cracking and curling.This paper reviews the major advancements in mesh-free numerical models and certain hybrid numerical methods in this field.Additionally,peridynamics is recommended for analyzing soil desiccation cracking and curling,with the related research results of the author team.The research results indicated that peridynamics still requires further investigation in several areas:numerical models for multi-physical field coupling analyses,elasto-plastic constitutive relationships,multi-scale simulations,the evolution of soil property parameters accompanied by complex boundary conditions,and the development of high-precision and efficient numerical algorithms.

关 键 词：土体干缩开裂 土层卷曲 无网格粒子类方法 混合数值模型 近场动力学 

分 类 号：TU431[建筑科学—岩土工程]