Method for training fatigue life prediction model of grouting connection structure, fatigue life prediction method, device and product

By combining CNN and LSTM, spatial features of grouting connection structures are extracted from CT scan images and fatigue life prediction models are trained using physical constraints. This solves the problem of fatigue life prediction under data constraints, achieves accurate prediction of grouting connection structures, and ensures the safe operation of offshore wind turbines.

CN122416166APending Publication Date: 2026-07-17JINAN UNIVERSITY

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JINAN UNIVERSITY
Filing Date
2026-06-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing methods for predicting the fatigue life of grouting connection structures for offshore wind turbines are limited by data acquisition constraints, making it difficult to accurately predict their fatigue life and threatening the operational safety of offshore wind turbines.

Method used

A method combining convolutional neural networks (CNN) and long short-term memory networks (LSTM) is adopted to extract spatial feature information from CT scan images of grouting connection structures. The fatigue life prediction model is trained by combining the loss function of physical constraints, so as to achieve accurate prediction of the damage state and fatigue life of grouting connection structures.

Benefits of technology

With limited data, it is possible to accurately predict the fatigue life of grouting connection structures, reduce reliance on large-scale fatigue testing, and ensure the safe operation of offshore wind turbines throughout their entire life cycle.

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Abstract

本申请适用于海上风电技术领域,提供了一种灌浆连接结构的疲劳寿命预测模型的训练方法、疲劳寿命预测方法、设备及产品,所述方法包括:在获取疲劳荷载下灌浆连接结构的CT扫描图像之后,通过CNN得到灌浆连接的空间特征信息;通过LSTM基于空间特征信息得到初始预测结果。然后基于初始预测结果、试验数据和损伤函数确定初始损失数据,基于所述初始损失数据确定损失函数中的可变参数,基于损失函数进行多次迭代更新,得到训练完成的疲劳寿命预测模型。在CT扫描数据样本较少的条件下,通过融合试验数据与物理约束,仍能够实现灌浆连接结构损伤演化全过程的高精度预测,并有效提高疲劳寿命评估结果的准确性和物理一致性。
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