• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2026, Vol. 62 ›› Issue (4): 328-341.doi: 10.3901/JME.260129

• 交叉与前沿 • 上一篇    

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面向结构损伤识别的数字孪生建模

杨亮亮1,2, 龚壮壮1,2, 何西旺1,2, 王沐晨1,2, 闵强3, 阚子云1,2, 宋学官1,2   

  1. 1. 大连理工大学机械工程学院 大连 116024;
    2. 大连理工大学高性能精密制造全国重点实验室 大连 116024;
    3. 飞行器数字敏捷设计全国重点实验室 成都 610031
  • 收稿日期:2025-02-16 修回日期:2025-08-30 发布日期:2026-04-02
  • 作者简介:杨亮亮,男,1993年出生,博士研究生。主要研究方向为传感器最优布局、损伤识别。E-mail:liangzai5358@163.com
    闵强(通信作者),男,1985年出生,硕士,高级工程师。主要研究方向为飞行器数字敏捷智能设计与结构平台多学科联合设计。E-mail:minqiang11@163.com
    宋学官,男,1982年出生,博士,教授,博士研究生导师。主要研究方向为多学科耦合建模与优化设计、工业大数据挖掘及数据驱动的预测技术、装备/智能化与数字孪生。E-mail:sxg@dlut.edu.cn
  • 基金资助:
    国家重点研发计划(2024YFB4709600)、国家自然科学基金(52205062)、江苏省自然科学基金(BK20220950)、长三角科技创新共同体联合攻关计划(2024C04056(CSJ))、江苏省前沿引领技术基础研究重大(BK20232031)、国家市场监督管理总局重点实验室(高参数电梯智能运维)(JSTJ-IOMHL-202503)、智控实验室开放基金(ICL-2023-0305)、国防科技大学装备状态感知与敏捷保障全国重点实验室基金(6142003202415)、上海航天科技创新基金(SAST2024-055)和民用航天预研(D020110)资助项目。

Digital Twin Construction for Structural Damage Identification

YANG Liangliang1,2, GONG Zhuangzhuang1,2, HE Xiwang1,2, WANG Muchen1,2, MIN Qiang3, KAN Ziyun1,2, SONG Xueguan1,2   

  1. 1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024;
    2. State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024;
    3. National Key Laboratory of Digital and Agile Aircraft Design, Chengdu 610031
  • Received:2025-02-16 Revised:2025-08-30 Published:2026-04-02

摘要: 损伤是结构的主要失效性形式,如何快速准确识别损伤可有效避免因损伤导致的失效和损坏,是结构健康监测的关键问题之一。鉴于此,本研究以提高结构损伤识别效率和准确性为目标,通过融合机理模型的模态信息和传感器的实测数据,提出一种面向结构损伤识别的数字孪生建模方法。首先,以简化的变截面类悬臂梁结构为例,依据结构几何尺寸、材料属性等信息构建结构孪生机理模型,基于Euler-Bernoulli理论快速获取健康结构固有频率。其次,依据机理模型计算的固有频率设置传感器采样频率和滤波参数,对监测数据进行分解、滤波和变换,提取结构损伤特征,并确定对损伤特征影响最大的损伤几何参数,结合损伤特征识别裂纹损伤长度和位置。然后,通过数值案例验证机理模型、损伤特征提取和数据驱动模型的可行性,结果表明,所提方法不仅可以提高损伤识别精度,而且能够快速识别损伤位置。最后,基于传感器实测数据构建面向结构损伤识别的数字孪生,在孪生空间中识别结构损伤,进一步验证提出孪生模型对结构损伤识别的有效性。该研究不仅为结构的损伤识别提供新的思路和方案,也为基于数字孪生的预测性维护提供新的借鉴和参考。

关键词: 数字孪生, 损伤识别, 结构损伤, 结构健康监测, 预测性维护

Abstract: Damage is the main form of structural failure, and how to quickly and accurately identify damage can effectively avoid failure and fault caused by damages, which is one of the key issues in structural health monitoring. In this study, to improve the accuracy of structural damage identification and achieve rapid damage identification, a digital twin(DT) construction method for structural damage identification is proposed by integrating mode information from mechanism model with sensor measurement data. First, taking the simplified cantilever beam with variable cross-section as an example, an DT mechanism model is built based on structural geometric dimensions, material properties, and so on. The natural frequencies of the health structure are quickly obtained using the Euler-Bernoulli theory. Subsequently, the sensor sampling frequency is set based on the calculated natural frequencies, and the monitored data is decomposed, filtered, and transformed to extract damage features. The most sensitive crack parameter type to damage features is obtained, and the crack length and position are identified by combining the damage features. Then, the feasibility of the mechanism model, damage feature extraction, and damage prediction model is verified through numerical cases. The results illustrate that the proposed method can effectively improve the accuracy of crack identification and quickly identify crack location. Finally, an DT is constructed based on sensor data to identify structural damage in the digital space, which further demonstrates the effectiveness of the proposed digital model for structural damage identification. This study not only provides new method and solution for structural damage identification, but also offers a new reference and guidance for predictive maintenance based on DTs.

Key words: digital twin, damage identification, structure damage, structural health monitoring, predictive maintenance

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