时变系统中动态载荷的识别与定位方法

IF 3.8 2区 工程技术 Q1 ENGINEERING, MECHANICAL Acta Mechanica Sinica Pub Date : 2024-11-21 DOI:10.1007/s10409-024-24359-x
Yixiao Li  (, ), Fang Zhang  (, ), Jinhui Jiang  (, )
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引用次数: 0

摘要

本文建立了时变系统中动态载荷的识别与定位方法。该方法将时变参数在小时间单元内线性化,并采用Wilson-θ逆分析方法求解各时间步长各阶模态载荷。然后使用穷举法确定载荷位置。最后,计算负载的时间历史。仿真实例验证了测点个数和步长对负载识别精度的影响,验证了该算法对谐振条件下负载的识别精度。此外,它还探讨了噪声如何影响负载位置和识别精度,同时提供了解决方案。仿真实例和实验结果表明,该方法可以同时识别载荷的时程和位置,具有较高的识别精度。
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A approach for the identification and localization of dynamic loads in time-varying systems

This paper establishes a method for identifying and locating dynamic loads in time-varying systems. The proposed method linearizes time-varying parameters within small time units and uses the Wilson-θ inverse analysis method to solve modal loads of each order at each time step. It then uses an exhaustive method to determine the load position. Finally, it calculates the time history of the load. Simulation examples demonstrate how the number of measuring points and step size affect load identification accuracy, verifying that this algorithm achieves good identification accuracy for loads under resonance conditions. Additionally, it explores how noise affects load position and recognition accuracy, while providing a solution. Simulation examples and experimental results demonstrate that the proposed method can identify both the time history and position of loads simultaneously with high identification accuracy.

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来源期刊
Acta Mechanica Sinica
Acta Mechanica Sinica 物理-工程:机械
CiteScore
5.60
自引率
20.00%
发文量
1807
审稿时长
4 months
期刊介绍: Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics
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