Periodic wave impeding barrier as a countermeasure of ground vibration

IF 1.9 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Hinde Laghfiri, N. Lamdouar, S. Abbas, El Mostapha Boudi
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引用次数: 1

Abstract

Single wave impeding barrier has been widely evaluated to attenuate vibrations. Nevertheless, research on the utilization of multiple-layer wave impeding barriers is extremely limited since most studies focus on periodic foundations and periodic piles. In this work, the attenuation of ground vibration utilizing a periodic wave-impeding barrier composed of rigid and elastic materials was investigated by applying improved plane wave expansion approach using the notion of phononic crystals, then the simulation of the proposed barrier is presented to demonstrate its relevance to the real case, where it can isolate more than 75% of vibration induced by El Centro earthquake. The effects of the key factors on the attenuation zone of the proposed wave impeding barrier are evaluated by conducting a thorough parametric study. Numerical results demonstrate that the mitigation efficiency at low frequencies increased as Young’s modulus of elastic material increased and as the density of two materials and periodic constant decreased. In addition, the proposed ANN model showed high accuracy to predict those parameters in order to choose them according to the desired attenuation zone. The findings of this study will aid the stakeholders in selecting the optimal geometrical and physical characteristics of the suggested barrier to attenuate vibration.
作为地面振动对抗手段的周期波障
单波障壁对振动的衰减作用得到了广泛的评价。然而,由于研究多集中在周期性基础和周期性桩上,对多层隔波屏障利用的研究非常有限。在这项工作中,采用改进的平面波展开方法,利用声子晶体的概念,研究了由刚性和弹性材料组成的周期性阻波屏障对地面振动的衰减,然后对所提出的屏障进行了模拟,以证明其与实际情况的相关性,其中它可以隔离埃尔森特罗地震引起的75%以上的振动。通过深入的参数研究,评估了关键因素对所提出的波障衰减区的影响。数值计算结果表明,低频时的缓振效率随着弹性材料杨氏模量的增大、两种材料密度和周期常数的减小而增大。此外,所提出的人工神经网络模型对这些参数的预测具有较高的准确性,以便根据所需的衰减区域选择参数。本研究的结果将有助于利益相关者选择建议的屏障的最佳几何和物理特性来衰减振动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advances in Mechanical Engineering
Advances in Mechanical Engineering 工程技术-机械工程
CiteScore
3.60
自引率
4.80%
发文量
353
审稿时长
6-12 weeks
期刊介绍: Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering
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