水利学报2026，Vol.57Issue(7)：1066-1078,1092,14.DOI:10.3724/j.slxb.20250616
面向混凝土全曲线力学响应的相场模型参数分段多目标优化策略
A piecewise multi-objective optimization strategy for phase-field model parameters oriented toward the full-curve mechanical response of concrete
摘要
Abstract
To address the high-dimensional multi-objective optimization challenge arising from the dependence of concrete fracture phase-field model parameters on empirical estimation or trial-and-error calibration,this study con-ducted a quantitative analysis of four solution parameters,including time-step,convergence tolerance,mesh size,and the ratio of mesh size to length scale.Furthermore,a piecewise multi-objective optimization framework was proposed toward the full-curve mechanical response of concrete,enabling the systematic optimization of solution parameters while simultaneously balancing model accuracy and computational efficiency.The results show that these four param-eters all have statistically significant effects on solution efficiency,with mesh size exhibiting more pronounced gradi-ent variations in goodness-of-fit metrics across the elastic,plastic,and softening stages,thereby making it the key computational parameter governing both the accuracy and efficiency of full-curve fitting.Further verification demon-strates that the framework maintains the consistent convergence direction of the optimal solution across different opti-mization algorithms,indicating good applicability and robustness.Compared with schemes targeting only fitting accu-racy,the overall computational efficiency of the model can be improved by more than 60%after an auxiliary optimiza-tion objective for solution efficiency is introduced within an allowable 5%reduction in accuracy.关键词
三点弯曲试验/细观模型/相场模型/分段参数优化/模型精度/计算效率Key words
three-point bending test/mesoscale model/phase-field model/piecewise parameter optimization/model accuracy/computational efficiency分类
建筑与水利引用本文复制引用
秦向南,王鑫,俞艳玲,魏博文,顾冲时,漆天奇..面向混凝土全曲线力学响应的相场模型参数分段多目标优化策略[J].水利学报,2026,57(7):1066-1078,1092,14.基金项目
国家自然科学基金项目(52209170,52379125) （52209170,52379125）
河南省自然科学基金青年科学基金(B类)项目(262300421100) （B类）
国家大坝安全工程技术研究中心基金项目(CX2023B06) （CX2023B06）
水灾害防御全国重点实验室开放基金项目(2025490311) （2025490311）
甘肃省水利科学试验研究及技术推广项目(25GSLK093) （25GSLK093）
