1.西北大学化工学院,陕西 西安710127
2.西安市绿色氢能制储用一体化技术重点实验室,陕西 西安710127
雷佩霞(2002—),女,硕士研究生,2833347672@qq.com
吴乐(1990—),男,博士,教授,lewu@nwu.edu.cn
收稿:2026-03-23,
修回:2026-06-11,
录用:2026-06-11,
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雷佩霞, 王莹, 田国娟, 等. 基于LSTM-PINN的MgH2吸放氢行为预测模型研究[J/OL]. 化工学报, 2026. DOI: 10.11949/0438-1157.20260371.
LEI Peixia, WANG Ying, TIAN Guojuan, et al. Research on model of MgH2 hydrogen absorption/desorption behavior based on LSTM-PINN[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260371.
针对MgH
2
吸放氢过程热力学与动力学复杂、传统模型依赖假设及纯数据驱动模型物理一致性差的问题,本研究首次提出一种融合长短期记忆神经网络(LSTM)与物理信息神经网络(PINN)的混合预测模型。以LSTM提取时序特征,嵌入范特霍夫热力学方程与JDM动力学方程作为双物理约束,设计复合损失函数实现端到端的训练。通过参数灵敏度分析,确定LSTM网络神经元数64/32、学习率0.0010、范特霍夫权重0.10、JDM权重0.05为设定参数范围内综合最优配置。研究结果表明模型性能优异,吸氢过程的决定系数R
2
最高达0.9998,放氢过程最高达0.9997;与LSTM、LSTM-Vanthoff和LSTM-JDM等模型相比,预测精度较高且收敛时间较短;模型训练过程稳定收敛且泛化性好。LSTM-PINN模型解决了传统物理建模依赖假设的问题,实现时序精准与物理一致的预测目标,为MgH
2
吸放氢动态过程预测提供新思路。
Aiming at the thermodynamic and kinetic complexity of the MgH
2
hydrogen absorption/desorption process
the reliance of traditional models on assumptions
and the poor physical consistency of purely data-driven models
this study proposes for the first time a hybrid prediction model that integrates Long Short-Term Memory (LSTM) networks with Physics-Informed Neural Networks (PINNs). The LSTM extracts temporal features
while the van’t Hoff thermodynamic equation and the JDM kinetic equation are embedded as dual physical constraints. A composite loss function is designed to enable end-to-end training. Through parameter sensitivity analysis
the optimal configuration within the defined parameter range is determined as follows: LSTM network neurons: 64/32
learning rate: 0.0010
van’t Hoff weight: 0.10
and JDM weight: 0.05. The results demonstrate excellent model performance
with the coefficient of determination (R
2
) reaching up to 0.9998 for the hydrogen absorption process and 0.9997 for the desorption pro
cess. Compared with models such as LSTM
LSTM-Vanthoff
and LSTM-JDM
the proposed model achieves higher prediction accuracy and shorter convergence time. The model training process is stable
convergent
and exhibits good generalizability. The LSTM-PINN model overcomes the reliance of traditional physical modeling on assumptions
achieving both temporal accuracy and physical consistency
thereby offering a new approach for predicting the dynamic behavior of MgH
2
hydrogen absorption/desorption.
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