CAO Hongyou,ZHANG Tingzhao,ZENG Zhuo,et al.Graph neural network-based surrogate modeling for truss structures response[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(06):102-110.
CAO Hongyou,ZHANG Tingzhao,ZENG Zhuo,et al.Graph neural network-based surrogate modeling for truss structures response[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(06):102-110. DOI: 10.13471/j.cnki.acta.snus.ZR20250140.
Graph neural network-based surrogate modeling for truss structures response
A surrogate model based on graph neural networks(GNN) is proposed for truss structure response prediction.Based on graph theory,a graph representation method is employed to describe the topological characteristics and physical information of truss structures.Graph convolution is used to establish correlations among variables,achieving dimensionality reduction of the training space through structural geometric and physical features.Furthermore,an attention mechanism is integrated into the model to effectively incorporate node and edge features,with feature weights of neighboring nodes and edges adaptively assigned according to element stiffness,thereby accurately simulating force transmission paths during training.Three truss structures with 10,19,and 27 design variables,respectively,serve as examples for evaluating prediction accuracy using the mean absolute percentage error metric.Comparative analysis indicates that the prediction error of the GNN model decreases significantly with an increasing number of training samples and remains exceptionally.
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