• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2026, Vol. 62 ›› Issue (7): 221-233.doi: 10.3901/JME.260373

• 机械动力学 • 上一篇    

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数字孪生驱动的转子系统变工况难测点响应实时预测方法

罗忠1,2,3, 李洪雨1,2, 李雷1,2,3,4, 董胤哲1,2   

  1. 1. 东北大学机械工程与自动化学院 沈阳 110819;
    2. 东北大学航空动力装备振动及控制教育部重点实验室 沈阳 110819;
    3. 东北大学佛山研究生创新学院 佛山 528312;
    4. 中国航空发动机集团有限公司沈阳发动机研究所 沈阳 110015
  • 收稿日期:2025-02-24 修回日期:2025-12-31 发布日期:2026-05-25
  • 作者简介:罗忠(通信作者),男,1978年出生,博士,教授,博士研究生导师。主要研究方向为转子动力学,动力学相似,数字孪生。E-mail:zhluo@mail.neu.edu.cn
    李洪雨,男,1999年出生,硕士研究生。主要研究方向为转子动力学,转子系统数字孪生。E-mail:lihongyu00002@163.com
  • 基金资助:
    国家自然科学基金(12272089,92360305)、广东省基础与应用基础研究基金(2023A1515110557)、辽宁省自然科学基金联合基金(2023-BSBA-102)、辽宁省教育厅基本科研(JYTQN2023162)、辽宁省科学计划(2023JH1/10400068)和中央高校基本科研业务专项资金(N2403022)资助项目。

Real-time Prediction Method for Response of Difficult-to-measure Points of Rotor System Under Variable Working Conditions Driven by Digital Twin

LUO Zhong1,2,3, LI Hongyu1,2, LI Lei1,2,3,4, DONG Yinzhe1,2   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819;
    2. Key Laboratory of Vibration and Control of Aero-Propulsion System of Ministry of Education, Northeastern University, Shenyang 110819;
    3. Foshan Graduate School of Innovation, Northeastern University, Foshan 528312;
    4. Shenyang Engine Research Institute, Aero Engine Corporation of China, Shenyang 110015
  • Received:2025-02-24 Revised:2025-12-31 Published:2026-05-25

摘要: 针对不同工况下转子系统某些关键位置的振动响应难以通过传感器实时获取的问题,提出了一种数字孪生驱动的转子系统变工况难测点响应实时预测方法。首先,基于动力学模型对转子系统振动特性进行分析,建立基于遗传算法-BP神经网络的高精简化模型作为动力学模型的数据驱动镜像,可提高模型响应计算速度,确保数字孪生模型的实时性;其次,提出一种基于RBF代理模型的模型动态更新方法,结合遗传算法-BP神经网络实现模型实时高效迭代优化,解决了实测振动信号与机理模型的融合问题;最后,搭建数字孪生实验平台,开展不同工况下转子系统难测点振动响应实时预测实验,完成数字孪生响应预测方法的有效性验证。实验结果表明:该数字孪生模型能够实现对转子系统运行状态的实时映射,且能够较好地解决转子系统的难测点响应预测问题。

关键词: 转子系统, 数字孪生, BP神经网络, RBF代理模型, 响应预测

Abstract: Aiming at the problem that the vibration response of some key positions of the rotor system under different working conditions is difficult to obtain in real time through the sensor, a real-time prediction method for the response of the rotor system under variable working conditions driven by digital twin is proposed. Firstly, based on the dynamic model, the vibration characteristics of the rotor system are analyzed, and a high-precision simplified model based on genetic algorithm-BP neural network is established as the data-driven image of the dynamic model, which can improve the response calculation speed of the model and ensure the real-time performance of the digital twin model. Secondly, a model dynamic updating method based on RBF surrogate model is proposed. The genetic algorithm-BP neural network is used to realize the real-time and efficient iterative optimization of the model, which solves the fusion problem of the measured vibration signal and the mechanism model. Finally, the digital twin experimental platform is built to carry out the real-time prediction experiment of the vibration response of the difficult point of the rotor system under different working conditions, and the validity of the digital twin response prediction method is verified. The experimental results show that the digital twin model can realize the real-time mapping of the operating state of the rotor system, and can better solve the problem of difficult point response prediction of the rotor system.

Key words: rotor system, digital twin, BP neural network, RBF surrogate model, response prediction

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