| 李云飞,何琴淑,王远岑.基于改进遗传算法的NiTi合金动态本构参数优化识别研究[J].有色金属材料与工程,2026,47(2):34-42. |
| 基于改进遗传算法的NiTi合金动态本构参数优化识别研究 |
| Research on optimization identification for dynamic constitutive parameters of NiTi alloy based on advanced genetic algorithm |
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| DOI：10.13258/j.cnki.nmme.20250511001 |
| 中文关键词: NiTi合金 动态本构模型 参数敏感度分析 改进遗传算法 优化识别 |
| 英文关键词:NiTi shape memory alloy dynamic constitutive model parameter sensitivity analysis advanced genetic algorithm optimization identification |
| 基金项目:国家自然科学基金企业联合基金重点资助项目（U24B2010） |
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| 摘要点击次数: 1117 |
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| 中文摘要: |
| 基于不可逆热力学理论框架构建的NiTi形状记忆合金动态本构模型包含多个待定本构参数。为提升待定参数的识别效率与精度，采用拉丁超立方抽样（latin hypercube sampling, LHS）方法对模型参数进行抽样，结合非参数统计中的Spearman秩相关分析法，分析本构参数随机输入样本集与对应目标函数输出结果集的相关性，基于Spearman秩相关系数实现参数敏感度的全局分析。在敏感度分析基础上，采用改进遗传算法对NiTi合金动态本构模型参数开展优化识别。半隐式应力积分方法计算结果表明，数值模拟得到的NiTi合金动态应力-应变曲线与已有试验数据吻合良好，验证了该优化识别方法的有效性，可用于NiTi合金及类似材料的本构参数识别。 |
| 英文摘要: |
| A dynamic constitutive model of NiTi shape memory alloy constructed based on the framework of irreversible thermodynamics contains multiple undetermined constitutive parameters. To improve the efficiency and accuracy of parameter identification, the Latin Hypercube Sampling (LHS) method is adopted to sample the model parameters. Combined with the Spearman rank correlation analysis method in non-parametric statistics, the correlation between the random input sample set of constitutive parameters and the corresponding output result set of the objective function is analyzed, and the global analysis of parameter sensitivity is realized based on the Spearman rank correlation coefficient. On the basis of sensitivity analysis, an improved genetic algorithm is used for the optimal identification of dynamic constitutive parameters of NiTi alloy. The calculation results of the semi-implicit stress integration method show that the dynamic stress-strain curves of NiTi alloy obtained by numerical simulation are in good agreement with the existing experimental data, which verifies the effectiveness of the proposed optimal identification method and can be applied to the identification of constitutive parameters of NiTi alloy and other similar materials. |
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