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Comparison of 2D and 3D models for numerical simulation of vibration reduction by periodic pile barriers

机译：比较2D模型和3D模型以周期性桩障进行减振的数值模拟

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With the assumption of infinite pile length, frequency attenuation zones of periodic pile barriers for plane waves are analyzed by the 2D periodic structure theory in the previous studies. 2D finite element models are used to validate the frequency attenuation zones obtained by the periodic structure theory, although the piles in practice are of finite length. This note aims to compare the 2D and 3D models for simulation of vibration reduction by periodic pile barriers. Based on the weak form quadrature element method, frequency attenuation zones are calculated by using the 2D periodic structure theory. Moreover, it is found that the 3D numerical results converge to the 2D numerical results as the pile length increases. Therefore, the 20 model can be used to consider the key properties that dominate the response of periodic pile barriers. (c) 2015 Elsevier Ltd. All rights reserved.
机译：在无限桩长的假设下，以往研究中的二维周期结构理论分析了平面波周期桩壁垒的频率衰减区。尽管实际中桩的长度是有限的，但是使用二维有限元模型来验证通过周期性结构理论获得的频率衰减区域。本说明旨在比较2D和3D模型，以模拟通过周期性桩障进行的减振。基于弱形式正交元法，利用二维周期结构理论计算出频率衰减区域。此外，发现随着桩长的增加，3D数值结果收敛于2D数值结果。因此，可以使用20模型来考虑支配周期性桩障反应的关键属性。 （c）2015 Elsevier Ltd.保留所有权利。

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