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arXiv 1604.03090cond-mat.dis-nn
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一次静态测量预测复杂结构中的波局部化

One single static measurement predicts wave localization in complex structures

Gautier Lefebvre, Alexane Gondel, Marc Dubois, Michael Atlan, Florian Feppon, Aimé Labbé, Camille Gillot, Alix Garelli, Maxence Ernoult, Svitlana Mayboroda, Mar… 展开作者

Gautier Lefebvre, Alexane Gondel, Marc Dubois, Michael Atlan, Florian Feppon, Aimé Labbé, Camille Gillot, Alix Garelli, Maxence Ernoult, Svitlana Mayboroda, Marcel Filoche, Patrick Sebbah

摘要:

最近的理论突破带来了一个新的工具,称为\emph{localization landscape},预测在复杂或无序系统的振动模式的本地化区域。在这里,我们报告的第一个实验,测量本地化景观,并证明其预测能力。利用全息技术测量具有复杂几何形状的薄板在均布载荷作用下的静态变形,可以直接获得横向函数。在振动时,该系统显示出精确地限制在由景观功能划定的子区域内的模式。此外,该函数的最大值与测量的本征频率相匹配,而谷网络的最小值给出了模式扩展的频率。这种方法可以通过单次静态测量全面表征复杂结构的低频谱。它为任何振动系统中本征模的控制和工程铺平了道路,特别是在结构或微观描述无法访问的情况下。

英文摘要:

A recent theoretical breakthrough has brought a new tool, called \emph{localization landscape}, to predict the localization regions of vibration modes in complex or disordered systems. Here, we report on the first experiment which measures the localization landscape and demonstrates its predictive power. Holographic measurement of the static deformation under uniform load of a thin plate with complex geometry provides direct access to the landscape function. When put in vibration, this system shows modes precisely confined within the sub-regions delineated by the landscape function. Also the maxima of this function match the measured eigenfrequencies, while the minima of the valley network gives the frequencies at which modes become extended. This approach fully characterizes the low frequency spectrum of a complex structure from a single static measurement. It paves the way to the control and engineering of eigenmodes in any vibratory system, especially where a structural or microscopic description is not accessible.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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