An Investigation into the Physical Mechanisms of Leak Noise Propagation in Buried Plastic Water Pipes: A Wave Dynamic Stiffness Approach
An Investigation into the Physical Mechanisms of Leak Noise Propagation in Buried Plastic Water Pipes: A Wave Dynamic Stiffness Approach
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DOI：
10.3390/acoustics6010009
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发表时间：
2024-02
期刊：
影响因子：
2.1
通讯作者：
O. Scussel;M. Brennan;J. Muggleton;F. C. L. de Almeida;Phillip F. Joseph;Yan Gao
中科院分区：
文献类型：
--
作者：
O. Scussel;M. Brennan;J. Muggleton;F. C. L. de Almeida;Phillip F. Joseph;Yan Gao
在埋地塑料水管中，主要由流体传播的波尤其令人感兴趣，因为它在泄漏噪声的传播中起着关键作用。因此，几位研究人员一直在研究如何确定波的传播速度及其随距离的衰减。这些特征被封装在波数中。通过研究影响该波数行为的因素，本文对泄漏噪声传播的物理机制进行了深入的研究。为了实现这一点，发展了一种替代的基于物理的波数模型，它使用了管道系统中各个组件的波动动力学刚度的概念，即管道中的水、管壁和周围介质。这有助于根据系统的物理性质，特别是管道与周围介质之间的界面，清楚地解释波动行为，这可能对从管壁向外部介质泄漏声能产生深远影响。对三种不同类型的周围介质系统进行了研究，找出了每种情况下影响泄漏噪声传播的因素。给出了在世界不同地区的两个不同试验点上的实验结果，以验证采用泄漏噪声作为激励机制的方法。
In buried plastic water pipes, the predominantly fluid-borne wave is of particular interest, as it plays a key role in the propagation of leak noise. Consequently, it has been studied by several researchers to determine the speed of wave propagation and its attenuation with distance. These features are encapsulated in the wavenumber. By examining the factors that govern the behaviour of this wavenumber, this paper presents an in-depth examination of the physical mechanisms of leak noise propagation. To achieve this, an alternative physics-based model for the wavenumber is developed, using the concept of the wave dynamic stiffnesses of the individual components within the pipe system, i.e., the water in the pipe, the pipe wall, and the surrounding medium. This facilitates a clear interpretation of the wave behaviour in terms of the physical properties of the system, especially the interface between the pipe and the surrounding medium, which can have a profound influence on the leakage of acoustic energy from the pipe wall into the external medium. Three systems with different types of surrounding medium are studied, and the factors that govern leak noise propagation in each case are identified. Experimental results on two distinct test sites from different parts of the world are provided to validate the approach using leak noise as an excitation mechanism.