基于数字孪生的裂纹扩展结构健康管理方法研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (9) : 253-260.

论文

常琦，陈乐乐，赵恒，谢方勤，高鹤明

作者信息 +

Health management method of crack propagation structures based on digital twin

CHANG Qi, CHEN Lele, ZHAO Heng, XIE Fangqin, GAO Heming

Author information +

文章历史 +

摘要

疲劳裂纹是金属结构常见的损伤之一，提出了一种构建数字孪生模型对裂纹扩展结构进行健康管理的方法。在数字孪生模型的建立过程中，首先建立裂纹结构的有限元模型，并结合Paris公式构建裂纹扩展模型；其次基于动态贝叶斯网络表示裂纹状态随时间演化的规律；最后采用粒子滤波算法作为模型的推理算法，从而在数字空间中完成对裂纹扩展行为的描述。通过应变传感器实时在线监测裂纹状态，驱动孪生模型动态更新，实现裂纹扩展状态和剩余使用寿命更准确的预测。通过实验验证了该方法在裂纹扩展结构健康管理上的有效性与实用性。

Abstract

Fatigue cracks are one of the common damages of metal structures. A method of constructing a digital twin model to manage the health of crack propagation structures is proposed. In the process of establishing the digital twin model, the finite element model of the crack structure is first established, and the crack propagation model is established by combining the Paris formula; Secondly, based on the Dynamic Bayesian Network, the law of crack state evolution with time is represented; Finally, the particle filter algorithm is used as the inference algorithm of the model, so as to complete the description of the crack propagation behavior in digital space. The crack state is monitored online in real time through the strain sensor, which drives the dynamic update of the twin model to achieve a more accurate prediction of the crack propagation state and remaining useful life. The effectiveness and practicability of this method in structural health management of crack propagation are verified by experiments.

导出引用

常琦，陈乐乐，赵恒，谢方勤，高鹤明. 基于数字孪生的裂纹扩展结构健康管理方法研究[J]. 振动与冲击, 2023, 42(9): 253-260

CHANG Qi, CHEN Lele, ZHAO Heng, XIE Fangqin, GAO Heming. Health management method of crack propagation structures based on digital twin[J]. Journal of Vibration and Shock, 2023, 42(9): 253-260

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