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首页> 外文期刊>Mechanical systems and signal processing >On the multi-scale vibroacoustic behavior of multi-layer rectangular core topology systems
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On the multi-scale vibroacoustic behavior of multi-layer rectangular core topology systems

机译：关于多层矩形核心拓扑系统的多尺度vibro声学行为

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摘要

The present work deals with multi-layer rectangular core topology systems built up by stacking layers made of different rectangular core geometries. Multi-layer systems have been intensively studied in terms of mechanical performances whereas their vibroacoustic behavior, acoustic efficiency and design is however still an open issue. Several design parameters should be considered to fully understand the dynamic and acoustic behaviour of such structures. Therefore, this paper focuses on controlling the transition frequency and the Sound Transmission Loss (STL) by modifying geometrical parameters of the unit cell, while keeping the mass constant. Infinite panels and real wavenumbers will be considered in the study. The Wave Finite Element Method (WFEM) is used to obtain the targeted indicators. The proposed designs give the opportunity to shift the transition frequency and to control the flexural waves propagating in the structure. Besides, the STL is highly improved in the full frequency range of interest compared to a standard sandwich panel made of a single core.
机译：本工作涉及由由不同矩形核心几何形状制成的堆叠层构建的多层矩形核心拓扑系统。在机械性能方面已经集中研究了多层系统，而其纵向行为，声学效率和设计仍然是一个开放的问题。应考虑几个设计参数来完全理解这种结构的动态和声学行为。因此，本文侧重于通过修改单元电池的几何参数来控制过渡频率和声音传输损耗（STL），同时保持质量常数。在研究中会考虑无限的面板和真正的波纹。波有限元方法（WFEM）用于获得目标指标。所提出的设计使机会改变过渡频率并控制在结构中传播的弯曲波。此外，与由单芯制成的标准夹层面板相比，STL在全频频率范围内高度改善。

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  • 来源
    《Mechanical systems and signal processing》 |2020年第9期|106629.1-106629.24|共24页
  • 作者

    N. Guenfoud; C. Droz; M.N. Ichchou; O. Bareille; E. Deckers; W. Desmet;

  • 作者单位

    Vibroacoustics & Complex Media Research Group LTDS - CNRS UMR 5513 Ecole Centrale de Lyon Ecully 69134 France Noise and Vibration Research Group PMA KU Leuven Celestijnenlaan 300 B B-3001 Heverlee Belgium;

    Vibroacoustics & Complex Media Research Group LTDS - CNRS UMR 5513 Ecole Centrale de Lyon Ecully 69134 France;

    Vibroacoustics & Complex Media Research Group LTDS - CNRS UMR 5513 Ecole Centrale de Lyon Ecully 69134 France;

    Vibroacoustics & Complex Media Research Group LTDS - CNRS UMR 5513 Ecole Centrale de Lyon Ecully 69134 France;

    Noise and Vibration Research Group PMA KU Leuven Celestijnenlaan 300 B B-3001 Heverlee Belgium DMMS Lab Flanders Make Belgium;

    Noise and Vibration Research Group PMA KU Leuven Celestijnenlaan 300 B B-3001 Heverlee Belgium DMMS Lab Flanders Make Belgium;

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  • 正文语种 eng
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  • 关键词

    Multi-layer core systems; Transition frequency; Sound transmission loss; Periodic structures;

    机译：多层核心系统;过渡频率;声音传输损失;定期结构;

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