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首页> 外文期刊>Mechanical systems and signal processing >Full-field measurements with Digital Image Correlation for vibro-impact characterisation
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Full-field measurements with Digital Image Correlation for vibro-impact characterisation

机译：具有数字图像相关的全场测量，用于振动冲击表征

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摘要

Vibro-impact (VI) based control strategies exploit non-linear phenomena occurring during impacts between oscillating masses and vibrating structures to mitigate vibrations. They are known to be effective on a wide frequency range, in harsh environnement, and they are eco-friendly in comparison to some visco-elastic polymers used for the same applica-tion. Different assumptions emerge to explain energy dissipation such as material and con-tact effects, or dynamic energy transfers between the structure and the oscillating masses acting as non-linear absorbers. As classical vibratory measurement tools do not allow to accurately and easily measure what happens in the contact area and the motion of the absorber, it is difficult to validate and quantify the phenomenon. The purpose of the study is to take advantage of full field measurements of the vibro-impact phenomenon to char-acterise a vibro-impact absorber and to better understand the interactions occurring dur-ing impact. To reach this objective, a dedicated experimental set-up has been designed and a method involving Digital Image Correlation (DIC) and a high-speed camera is used to cap-ture and reconstruct the motion of the oscillating mass. The characterisation allows to esti-mate the Coefficient Of Restitution (COR) and friction forces, and provides data that are used in two different contact modelling strategies based on the COR and on the Hertz con-tact theory. The quantities identified in this paper enable to better understand the physical phenomena at stakes in a VI absorber.
机译：基于振动的控制策略在振荡质量和振动结构之间发生影响期间发生的非线性现象来减轻振动。已知它们在恶劣的环境中对宽频率范围有效，并且与用于相同应用的一些粘弹性聚合物相比，它们是生态友好的。不同的假设出现以解释诸如材料和控制效应的能量耗散，或者结构与作为非线性吸收剂的振荡质量之间的动态能量转移。由于经典振动测量工具不允许准确且容易地测量接触面积和吸收器的运动会发生的情况，难以验证和量化现象。该研究的目的是利用振动抗冲现象的全场测量，以赋予振动冲击吸收器，并更好地理解抗冲击的相互作用。为了达到该目的，已经设计了专用的实验设置，并且涉及数字图像相关（DIC）和高速相机的方法用于覆盖和重建振荡质量的运动。表征允许估算恢复系数（COR）和摩擦力，并提供基于COR和Hertz Con-Tact理论的两种不同的接触建模策略中使用的数据。本文中确定的数量使得能够更好地了解VI吸收器中的赌注的物理现象。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第7期|107658.1-107658.16|共16页
  • 作者

    R. Chabrier; E. Sadoulet-Reboul; G. Chevallier; E. Foltete; T. Jeannin;

  • 作者单位

    Univ. Bourgogne Franche-Comte FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM Department of Applied Mechanics 24 chemin de I'Epitaphe 25000Besancon France;

    Univ. Bourgogne Franche-Comte FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM Department of Applied Mechanics 24 chemin de I'Epitaphe 25000Besancon France;

    Univ. Bourgogne Franche-Comte FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM Department of Applied Mechanics 24 chemin de I'Epitaphe 25000Besancon France;

    Univ. Bourgogne Franche-Comte FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM Department of Applied Mechanics 24 chemin de I'Epitaphe 25000Besancon France;

    Univ. Bourgogne Franche-Comte FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM Department of Applied Mechanics 24 chemin de I'Epitaphe 25000Besancon France;

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  • 正文语种 eng
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  • 关键词

    Vibro-impact; Digital Image Correlation; Coefficient of Restitution; Hertz-contact; High-speed camera; Full-field measurement;

    机译：振动冲击;数字图像相关;恢复系数;赫兹 - 联系;高速相机;全场测量;

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