On the effects of soil properties on leak noise propagation in plastic water distribution pipes

Autor(es)

Brennan, M. J. ^[1] ; Karimi, M. ^[2] ; Muggleton, J. M. ^[3] ; Almeida, F. C. L. ^[4] ; Kroll de Lima, F. ^[1] ; Ayala, P. C. ^[1] ; Obata, D. ^[1] ; Paschoalini, A. T. ^[1] ; Kessissoglou, N. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Dept Mech Engn, BR-15385000 Sao Paulo - Brazil

^[2] Univ New South Wales, Sch Mech & Mfg Engn, Sydney, NSW 2052 - Australia

^[3] Univ Southampton, Inst Sound & Vibrat Res, Southampton, Hants - England

^[4] Univ Estadual Paulista, Dept Biosyst Engn, BR-17602496 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Sound and Vibration; v. 427, p. 120-133, AUG 4 2018.
• Citações Web of Science: 5

Resumo

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. (AU)

• Processo FAPESP: 15/50312-4 - The vibro-acoustic behaviour of buried plastic water pipes and its influence on leak detection
• Beneficiário: Michael John Brennan
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/50412-3 - Desenvolvimento de um correlacionador de sinais nacional otimizado para localização e detecção de vazamentos em dutos de água subterrâneos da SABESP, juntamente com dispositivos efetivos para o treinamento de equipes de detecção de vazamento
• Beneficiário: Michael John Brennan
• Linha de fomento: Auxílio à Pesquisa - Parceria para Inovação Tecnológica - PITE