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首页> 外文期刊>Composite Structures >Wave propagations of a periodic sandwich beam by FEM and the transfer matrix method
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Wave propagations of a periodic sandwich beam by FEM and the transfer matrix method

机译：有限元法和传递矩阵法研究周期夹层梁的波传播。

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摘要

Periodic structures can act as filters for wave propagation within certain bands of frequency called stop bands. The partially constrained layer damping (CLD) treatments are placed periodically along the beam and covered with a constrained layer to control the longitudinal wave propagation in this beam. The CLD placed on the beams act as the sources of impedance mismatch with visco-elastic characteristics. The location and width of the stop bands can be changed with different configurations of the periodic structure. The finite element model and the transfer matrix method are developed to study the one-dimensional, periodically structural problems to predict the performance of the system. The behavior of the periodic structure are evaluated at different length ratios and base beam materials. The investigation in the present study provides the basic guidelines to design periodic structures with smart materials to achieve desired filtering characteristics.
机译：周期性结构可以充当滤波器在特定频率的频带（称为阻带）中传播。沿梁定期放置部分约束层阻尼（CLD）处理，并用约束层覆盖，以控制该梁中的纵向波传播。放置在梁上的CLD会成为具有粘弹特性的阻抗失配的根源。阻带的位置和宽度可以通过周期性结构的不同配置来改变。开发了有限元模型和传递矩阵方法来研究一维周期性结构问题，以预测系统的性能。在不同的长度比和基础梁材料下评估周期性结构的行为。本研究中的研究提供了使用智能材料设计周期性结构以实现所需过滤特性的基本指南。

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