航空学报 > 2025, Vol. 46 Issue (19): 530967-530967   doi: 10.7527/S1000-6893.2024.30967

数字孪生驱动的结构全场变形高精度反演方法

黄熠玮1, 耿一斌2, 高天贺1, 胡轩玮1, 王圆3, 马红艳1, 田阔1,4()   

  1. 1.大连理工大学 工程力学系,大连 116024
    2.中国商飞上海飞机设计研究院,上海 201210
    3.神州五行航天科技有限公司,大连 116085
    4.辽宁省飞行器结构强度数字孪生重点实验室,沈阳 110035
  • 收稿日期:2024-07-29 修回日期:2024-08-19 接受日期:2024-10-07 出版日期:2024-10-16 发布日期:2024-10-15
  • 通讯作者: 田阔 E-mail:tiankuo@dlut.edu.cn
  • 基金资助:
    辽宁省人工智能领域科技重大专项(2023JH26/10100007);辽宁省优秀青年基金(2024JH3/10200003);国家重点研发计划(2022YFB3404700)

Digital twin driven high precision reconstruction method for full-field deformation of structure

Yiwei HUANG1, Yibin GENG2, Tianhe GAO1, Xuanwei HU1, Yuan WANG3, Hongyan MA1, Kuo TIAN1,4()   

  1. 1.Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,China
    2.COMAC Shanghai Aircraft Design and Research Institute,Shanghai 201210,China
    3.ShenZhou WuXing Space Technology Co. ,Ltd. ,Dalian 116085,China
    4.Liaoning Provincial Key Laboratory of Digital Twins for Aircraft Structural Strength,Shenyang 110035,China
  • Received:2024-07-29 Revised:2024-08-19 Accepted:2024-10-07 Online:2024-10-16 Published:2024-10-15
  • Contact: Kuo TIAN E-mail:tiankuo@dlut.edu.cn
  • Supported by:
    Major Science and Technology Projects in the Field of Artificial Intelligence of Liaoning Province(2023JH26/10100007);Excellent Youth Fund under the Science and Technology Program of Liaoning Province(2024JH3/10200003);National Key Research and Development Program of China(2022YFB3404700)

摘要:

针对传统直接和间接变形监测方法难以满足结构高精度实时变形监测的问题,提出一种数字孪生驱动的结构全场变形高精度反演方法。首先,通过融合仿真和实测应变数据,构建了结构多方向数字孪生应变场,降低载荷偏差等因素对仿真可靠性影响,保证变形反演的应变精度要求。其次,提出了一种考虑多方向应变的模态坐标求解和变形反演方法,使用结构多方向应变参与模态坐标求解,解决使用单方向应变时反演结果稳定性不足问题,提升结构全场变形反演的稳定性。最后,基于所提出方法,以机翼结构为对象开展试验验证,与仿真及传统模态法的变形反演结果进行对比。结果表明,所提出方法在变形较大处反演精度具有更高优势。在变形较大位置,所提出方法反演结果与试验测量变形相对误差<0.8%,绝对误差<0.09 mm,相比传统模态法和仿真分析方法变形反演误差分别降低7%和12%。同时,所提出方法对多个测点位置变形反演平均相对误差为1.2%,相比传统模态法和仿真分析方法变形反演误差分别降低5.7%和9.3%。并且在应变传感器数目较少时,所提出方法的变形反演精度相较于传统模态法提升超过一个数量级,表明所提出方法具有较高的变形反演精度和稳定性。

关键词: 数字孪生, 变形反演, 模态叠加, 数据融合, 机翼结构

Abstract:

To address the issue that traditional direct and indirect deformation monitoring methods are difficult to meet the requirements of high-precision real-time deformation monitoring of structures, a digital twin-driven high-precision reconstruction method for full-field deformation of structure is proposed. Firstly, a multi-directional digital twin strain field is constructed by integrating simulation and measured strain data, which reduces the influence of load deviation and other factors on the simulation reliability, and ensures the strain accuracy of the deformation reconstruction. Secondly, a modal coordinate solving and deformation reconstruction method considering multi-directional strain is proposed. By incorporating multi-directional strain in the modal coordinate solving process, this method solves the problem of insufficient stability of the reconstruction results when single-directional strain is used, and improves the stability of the full-field deformation reconstruction of the structure. Finally, based on the proposed method, the experimental validation is carried out with the wing structure, and the results are compared with the simulation and the deformation reconstruction results of the traditional modal superposition method. The result shows that the proposed method has a higher advantage of reconstruction accuracy in the place of large deformation. The relative error between the reconstruction results of the proposed method and the measured deformation is less than 0.8%, and the absolute error is less than 0.09 mm, which is 7% and 12% lower than that of the traditional modal method and the simulation method, respectively. At the same time, the average relative error of the proposed method for deformation reconstruction at multiple measurement points is 1.2%, which is 5.7% and 9.3% lower than that of the traditional modal method and simulation analysis method, respectively. Moreover, when the number of strain gauges is small, the deformation reconstruction accuracy of the proposed method is improved by more than one order of magnitude compared with the traditional modal superposition method, which indicates that the proposed method has higher deformation reconstruction accuracy and stability.

Key words: digital twin, deformation reconstruction, modal superposition, data fusion, wing structure

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