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首页> 外文期刊>Journal of aerospace engineering >Vibration Isolation of Plane Waves by Periodic Pipe Pile Barriers in Saturated Soil
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Vibration Isolation of Plane Waves by Periodic Pipe Pile Barriers in Saturated Soil

机译：饱和土中周期性管桩屏障对平面波的振动隔离

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Pile barriers as an effective method for isolating ambient vibration have been used in practical engineering for many decades. However, the study of multiple rows of pile barriers in saturated soil is rare, especially of periodic pipe pile barriers in saturated soil. Based on a new method called the COMSOL partial differential equation (PDE) method, this paper investigates the vibration isolation of plane waves by periodic pipe pile barriers in saturated soil. First, through some comparisons with results from related works, the COMSOL PDE method is validated. Second, the first complete attenuation zone (CAZ) of pipe piles embedded periodically in saturated soil is studied; the effects of parameters such as the filling fraction, arrangement configuration, and filling materials on the first CAZ are discussed. Two kinds of formation mechanism of the first CAZ for periodic filled pipe pile barriers, the Bragg scattering mode and the locally resonant mode, are investigated comprehensively. Both two-dimensional (2D) and three-dimensional (3D) models with multiple rows of periodic pipe piles in saturated soil are built, and the displacement responses behind the pile barriers are analyzed in the frequency domain. This study provides a sound background for the application of periodic pipe pile barriers in saturated soil to isolate ambient vibration in engineering practice. (C) 2018 American Society of Civil Engineers.
机译：桩障作为一种隔离环境振动的有效方法已在实际工程中使用了数十年。但是，对饱和土壤中多排桩障的研究很少，特别是对饱和土壤中的周期性管桩屏障的研究。基于一种称为COMSOL偏微分方程（PDE）方法的新方法，本文研究了饱和土中周期性管桩屏障对平面波的振动隔离。首先，通过与相关工作的结果进行一些比较，验证了COMSOL PDE方法。其次，研究了饱和状态下周期性埋入的管桩的第一个完整衰减区（CAZ）。讨论了诸如填充比例，布置配置和填充材料等参数对第一个CAZ的影响。全面研究了周期性填充管桩屏障的第一个CAZ的两种形成机理，即布拉格散射模式和局部共振模式。建立了在饱和土壤中具有多排周期性管桩的二维（2D）和三维（3D）模型，并在频域中分析了桩障后的位移响应。该研究为在工程实践中在饱和土壤中应用周期性管桩护栏隔离环境振动提供了良好的背景。 （C）2018美国土木工程师学会。

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