灾害学2026，Vol.41Issue(1)：104-114,11.DOI:10.3969/j.issn.1000-811X.2026.01.014
基于SPH-FEM流固耦合作用下多级拦挡坝动力响应分析
Dynamic Response Analysis of Multi-stage Blocking Dam under Fluid-Structure Interaction Based on the SPH-FEM Method
摘要
Abstract
In order to explore the interaction mechanism between debris flow and multi-stage retaining struc-ture,a numerical model of coupled smoothed particle hydrodynamics(SPH)and finite element method(FEM)is established to simulate the coupling process of debris flow slurry and block stone.The dynamic responses of three kinds of composite dams,including grille-gravity dam,grille-grille dam and gravity-gravity dam,under the action of debris flow are analyzed,including debris flow velocity,impact force,dam reaction force and dam Von Mises stress.The results show that the impact force of multi-stage dam bearing debris flow is closely related to the dam structure.The dam has strong permeability,small overall load but local stress concentration.Gravity dam reduces local stress by slurry buffer layer.In addition,the reaction force of the first-stage dam is generally higher than that of the second-stage dam.When the first-stage dam is a gravity dam,the stress increases sharply,and the grille dam makes the load distribution reasonable and reduces the stress difference.Therefore,the struc-tural characteristics of the dam body have a regulatory effect on the load distribution,which can provide a design reference for the optimization of dam type combination in engineering practice.关键词
泥石流/SPH-FEM耦合/多级拦挡坝/动力响应Key words
debris flow/SPH-FEM coupling/multi-stage blocking dam/dynamic response分类
资源环境引用本文复制引用
王永胜,龚蕓,祝佳..基于SPH-FEM流固耦合作用下多级拦挡坝动力响应分析[J].灾害学,2026,41(1):104-114,11.基金项目
国家自然科学基金项目"冲击作用下新型泥石流格栅坝结构可靠性分析及试验研究"(51768039) （51768039）
"考虑协同作用的泥石流多级拦排系统优化配置及试验研究"(52269024) （52269024）
"泥石流流域与防治结构群互馈机理及智能化监控研究"(52468074) （52468074）
