Localization of impact on box mechanical structure by the method of modal parameters extraction combined with K-means clustering

IF 1.1 4区工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY

Inverse Problems in Science and Engineering Pub Date : 2021-06-14 DOI:10.1080/17415977.2021.1940164

Zhenfeng Huang, Dahuan Wei, H. Mao, Xinxin Li, Weili Tang, Kuangchi Sun, Xun Qian

引用次数: 0

Abstract

In structural health monitoring, the localization of impact is one of the most basic and challenging problems. However, existing technologies are only suitable for obtaining the impact position of plate structures, which hinder their engineering applications. Here, we propose a new method to study the impact position of complex box structures. The proposed method is based on modal parameters and k-means clustering. The modal parameters under different excitation are extracted by applying repeated impact to different positions of the structure, and then the modal constants are clustered to form the cluster centrrs. When the impact occurs at a certain location, the extracted modal constants can be compared with the clustering centres to determine the impact location. The effectiveness of this method is verified by the impact experiment of the gearbox.

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结合k均值聚类的模态参数提取方法对箱体机械结构的冲击定位

在结构健康监测中，冲击定位是最基本、最具挑战性的问题之一。然而，现有技术仅适用于获取板结构的冲击位置，阻碍了其工程应用。本文提出了一种研究复杂箱体结构冲击位置的新方法。该方法基于模态参数和k均值聚类。通过对结构的不同位置进行重复冲击，提取不同激励下的模态参数，然后对模态常数进行聚类，形成聚类中心。当撞击发生在某一位置时，提取的模态常数可以与聚类中心进行比较，从而确定撞击位置。通过齿轮箱的冲击实验验证了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Inverse Problems in Science and Engineering 工程技术-工程：综合

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Inverse Problems in Science and Engineering provides an international forum for the discussion of conceptual ideas and methods for the practical solution of applied inverse problems. The Journal aims to address the needs of practising engineers, mathematicians and researchers and to serve as a focal point for the quick communication of ideas. Papers must provide several non-trivial examples of practical applications. Multidisciplinary applied papers are particularly welcome. Topics include: -Shape design: determination of shape, size and location of domains (shape identification or optimization in acoustics, aerodynamics, electromagnets, etc; detection of voids and cracks). -Material properties: determination of physical properties of media. -Boundary values/initial values: identification of the proper boundary conditions and/or initial conditions (tomographic problems involving X-rays, ultrasonics, optics, thermal sources etc; determination of thermal, stress/strain, electromagnetic, fluid flow etc. boundary conditions on inaccessible boundaries; determination of initial chemical composition, etc.). -Forces and sources: determination of the unknown external forces or inputs acting on a domain (structural dynamic modification and reconstruction) and internal concentrated and distributed sources/sinks (sources of heat, noise, electromagnetic radiation, etc.). -Governing equations: inference of analytic forms of partial and/or integral equations governing the variation of measured field quantities.