Analysis of phase data from ground vibration measurements above a leaking plastic water pipe
Analysis of phase data from ground vibration measurements above a leaking plastic water pipe
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DOI：
10.1016/j.jsv.2023.117873
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发表时间：
2023-06
影响因子：
4.7
通讯作者：
O. Scussel;M. Brennan;M. Iwanaga;F. Almeida;M. Karimi;J. Muggleton;P. Joseph;E. Rustighi
中科院分区：
文献类型：
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作者：
O. Scussel;M. Brennan;M. Iwanaga;F. Almeida;M. Karimi;J. Muggleton;P. Joseph;E. Rustighi
定位埋地塑料水管的一种方法是测量由于管道上方区域中的泄漏引起的表面振动，并处理数据以推断管道位置。本文研究了泄漏噪声通过管道和周围土壤传播到地面的物理机制。分析了管道上方网格点处垂直地面振动测量值之间的相对相位。该研究涉及来自英国一个站点的实验测量，与最近的研究相比，该站点具有更现实的泄漏机制，简化的分析模型可以深入了解底层物理，以及数值模型可以验证在推导分析模型时所做的一些假设。三种波主要涉及将泄漏噪声从管道传播到地面，即管道中的主要流体传播波，以及从管道辐射的土壤中的剪切波和压缩波。地面振动的影响，调查通过测量和模拟相位轮廓在一个矩形网格的表面速度测量。它示出了如何剪切波和压缩波联合收割机，以影响地面上的恒定相位的线的形状。结果表明，所提出的分析和数值模型的潜力，调查波辐射从埋地水管，和可能的管道定位策略，使用相位数据从表面振动测量。
One way to locate a buried plastic water pipe is to measure the surface vibration due to a leak in the region above the pipe, and to process the data to infer the pipe location. This paper investigates the physical mechanisms that propagate leak noise through the pipe and the surrounding soil to the ground surface. An analysis is carried out of the relative phase between vertical ground vibration measurements at points in a grid above the pipe. The study involves experimental measurements from a site in the UK with a more realistic leak mechanism compared to recent research, a simplified analytical model to gain insight into the underlying physics, and a numerical model to validate some of the assumptions made in the derivation of the analytical model. Three waves are principally involved in propagating leak noise to the ground surface from the pipe, namely the predominantly fluid-borne wave in the pipe, and the shear and compressional waves in the soil radiating from the pipe. Their influence on the ground surface vibration is investigated through measured and simulated phase contours over a rectangular grid of surface velocity measurements. It is shown how shear and compressional waves combine to affect the shape of the lines of constant phase on the ground. The results demonstrate the potential of the proposed analytical and numerical models to investigate wave radiation from buried water pipes, and possible pipe location strategies using phase data from surface vibration measurements.