@article{MOU2026, 
author = {Haolei MOU and Jia ZHANG and Zhenyu FENG and Chunyu BAI},
title = {Prediction of axial crushing response for CFRP thin-walled C-columns based on WOA-BP-LSTM autoencoder},
year = {2026},
journal = {Acta Aeronautica et Astronautica Sinica},
volume = {47},
number = {4},
keywords = {CFRP thin-walled C-columns, axial crushing response, LSTM autoencoder, whale optimization algorithm, BP neural network},
url = {https://www.sciopen.com/article/10.7527/S1000-6893.2025.32349},
doi = {10.7527/S1000-6893.2025.32349},
abstract = {To predict the force-displacement responses of Carbon Fiber Reinforced Plastic (CFRP) thin-walled C-columns in the aircraft sub-cargo area under quasi-static axial crushing, an intelligent prediction model (WOA-BP-LSTM autoencoder model) integrating the Whale Optimization Algorithm (WOA), Back Propagation (BP) neural network, and Long Short-Term Memory (LSTM) autoencoder was proposed. The reliability of the finite element model of CFRP thin-walled C-columns was validated through quasi-static axial crushing tests, with axial crushing response evaluation indicators showing errors within 10%. A dataset comprising 700 force-displacement response samples with variable cross-sectional geometric parameters was constructed based on the model. The LSTM autoencoder was employed for dimensionality reduction and reconstruction of the force-displacement responses. Subsequently, the BP neural network was used for force-displacement responses prediction, with WOA optimizing the neural network parameters. The results show that the LSTM autoencoder achieved high-precision reconstruction of force-displacement responses, where the errors for initial peak crushing force and energy absorption in the test set were both less than 3%, and 80% of the samples had errors within 1%. The optimized prediction model significantly improved prediction accuracy, reducing the test set's Mean Absolute Error (MAE) by 17.55%, Mean Squared Error (MSE) by 31.77%, and Root Mean Squared Error (RMSE) by 17.47%. Prediction errors for the initial peak crushing force and energy absorption were both less than 8%, with 80% of samples showing errors within 5%. This model enables rapid and accurate prediction of axial crushing responses for variable cross-section CFRP thin-walled C-columns while reducing computational costs, providing an efficient parameter-performance mapping tool for the study of its axial crushing response.}
}