On the effects of soil properties on leak noise propagation in plastic water distribution pipes
On the effects of soil properties on leak noise propagation in plastic water distribution pipes
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DOI：
10.1016/j.jsv.2018.03.027
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发表时间：
2018-08-04
影响因子：
4.7
通讯作者：
Kessissoglou, N.
中科院分区：
文献类型：
--
作者：
Brennan, M. J.;Karimi, M.;Kessissoglou, N.
在许多国家，通过测量疑似泄漏的两侧管道振动的互相关值来定位供水管道中的泄漏。然而，在现代塑料管道中，这可能是有问题的，因为水、管道和土壤之间的强耦合，影响了管道内泄漏噪声的传播。本文对土壤性质对埋地塑料水管泄漏噪声传播的影响进行了分析、数值和实验研究。该分析模型可以详细研究土壤对泄漏噪声(波)在管道中传播的物理影响，特别是对波速和波衰减的影响。结果表明，除管箍刚度外，土的剪切刚度对管内波速也有显著影响。实验测量在两个不同的地点进行--一个在英国，另一个在巴西。在UK系统中，土壤中的伸缩波和横波都在远离管道的地方传播，导致管道中的波有很大的衰减。然而，在巴西系统中，只有横波传播，导致管道中的波衰减较小。(C)2018爱思唯尔有限公司。保留所有权利。
In many countries, leaks are located in water distribution pipes by using the cross-correlation of pipe vibration measured either side of a suspected leak. However, in modern plastic pipes this can be problematic due to strong coupling between the water, the pipe and the soil, affecting the propagation of leak noise within the pipe. This paper concerns an analytical, numerical and experimental investigation into the way in which soil properties influence leak noise propagation in buried plastic water pipes. The analytical model allows a detailed investigation into the physical effects of the soil on leak noise (wave) propagation in the pipe, in particular on the wave-speed and wave attenuation. Results highlight that, in addition to the pipe hoop stiffness, the shear stiffness of the soil can have a significant effect on the wave-speed in the pipe. Experimental measurements were conducted at two different sites - one in the UK and the other in Brazil. In the UK system, both dilatational and shear waves in the soil propagate away from the pipe, resulting in large wave attenuation in the pipe. However, in the Brazilian system, only shear waves propagate resulting in smaller wave attenuation in the pipe. (C) 2018 Elsevier Ltd. All rights reserved.