Broadband vibration damping of non-periodic plates by piezoelectric coupling to their electrical analogues
Broadband vibration damping of non-periodic plates by piezoelectric coupling to their electrical analogues
复制标题
通过与其电类似物的压电耦合实现非周期板的宽带振动阻尼
DOI：
10.1088/1361-665x/ab7948
复制
发表时间：
2020
影响因子：
4.1
通讯作者：
J. Deü
中科院分区：
文献类型：
--
作者：
R. Darleux;B. Lossouarn;J. Deü
多年来，人们提出了几种基于压电耦合的薄壁机械结构多振型减振方案。其中，压电网络的减振是指利用压电换能器将结构耦合到电网中，从而将传递的电能耗散的过程。特别是，耦合棒、梁和板对它们的模拟电网的有效性已经被证明。这项工作是迈向更复杂结构的第一步。在定义和实验验证了简支板的完全无源电模拟网络之后，将研究扩展到非周期板的阻尼。本文研究的非周期性包括局部质量的增加和可变厚度的增加。数值模拟和实验表明，在这些情况下，一旦将压电换能器耦合到适当的模拟网络，就可以获得宽带衰减。同时建立了与二维非周期电网络耦合的结构的有限元模型并进行了验证，这是本工作的另一个贡献。
Several solutions for multimodal vibration damping of thin mechanical structures based on piezoelectric coupling have been developed over the years. Among them, piezoelectric network damping consists in using piezoelectric transducers to couple a structure to an electrical network, where the transferred electrical energy can be dissipated. In particular, the effectiveness of coupling rods, beams and plates to their analogous electrical networks has been proven. This work is the first step going towards more complex structures. After defining and experimentally validating a fully passive electrical analogous network of a simply-supported plate, the study is extended to the damping of a non-periodic plate. The non-periodicities here studied include the addition of a local mass and a variable thickness. Numerical simulations and experiments show that in these cases, a broadband damping is achieved once the piezoelectric transducers are coupled to an adequate analogous network. A finite element model of the structure coupled to a 2D non-periodic electrical network is concurrently developed and validated, which is another contribution of the present work.
支持聋盲人使用电子邮件的视频剪辑原型制作 (2) - 支持聋盲人使用手语作为交流手段发送电子邮件的电子学习材料 -
DOI：
--
发表时间：
2006
期刊：
ライフサポート学会人と福祉を支える技術フォーラム
影响因子：
--
作者：
中野泰志;大河内直之
通讯作者：
大河内直之