岩土工程学报2025，Vol.47Issue(10)：2086-2095,10.DOI:10.11779/CJGE20240941
基于自适应插值物质点法的心墙坝大变形分析研究
Analysis of large deformation of core wall dams based on adaptive interpolation material point method
摘要
Abstract
The deformation simulation method of core wall dams has always been a hot and difficult topic in the industry.Traditional grid-based methods,such as finite element method,finite volume method and finite difference method,are often applied to deformation analysis.However,when dealing with large deformation problems,the Jacobian matrix becomes abnormal due to mesh distortion,making the calculation impossible.Therefore,within the basic framework of the material point method,this paper constructs the convective particle Gaussian interpolation function and combines it with the particle interpolation function to propose the adaptive interpolation material point method(AIMPM)applicable to fluid-solid coupling problems.Taking the landslide of the Carsington core wall dam as an example,the AIMPM is used to analyze the evolution law of the whole process from the construction period to the instability and landslide of the dam.The results show that:(1)According to the actual construction situation of the dam,the AIMPM can accurately describe the development process of deformation and pore pressure during the construction stage of the dam body;(2)Under the condition of obtaining the initial stress during the construction of the dam body,the Adaptive Interpolation Material Point Method(AIMPM)can simulate the complete evolutionary process of the dam from the formation of the initial sliding surface to the final accumulation body after the dam break;(3)By capturing the running characteristics of particles,the failure process of the dam body can be divided into three stages:rigid body displacement stage,stress equilibrium stage and velocity convergence stage.Through the refined simulation of the classic core wall dam,it is indicated that the adaptive interpolation material point method proposed in this paper can be flexibly applied in both small strain and large deformation fields,providing an effective approach for the deformation and failure analysis of core wall dams.关键词
心墙坝/大变形/物质点法/数值方法/流固耦合Key words
core wall dam/large deformation/material point method/numerical methods/fluid-soil coupling分类
建筑与水利引用本文复制引用
彭雪峰,吉恩跃,陈生水,傅中志,张意江..基于自适应插值物质点法的心墙坝大变形分析研究[J].岩土工程学报,2025,47(10):2086-2095,10.基金项目
国家自然科学基金优秀青年科学基金项目(52222906) （52222906）
国家自然科学基金联合基金重点支持项目(U21A20158) （U21A20158）
中国博士后科学基金第 76批面上资助项目(2024M761467) （2024M761467）
国家自然科学基金青年基金项目(52309158)This work was supported by Excellent Young Scientists Fund of National Natural Science Foundation of China(Grant No.52222906),Program for Joint Funds of National Natural Science Foundation of China(Grant No.U21A20158),China Postdoctoral Science Foundation(Grant No.2024M761467),Young Scientists Fund of National Natural Science Foundation of China(Grant No.52309158). （52309158）
