Explanation for the frequency shift pattern of nonuniform blocked pipeline systems from an energy perspective

T. C. Che; H. F. Duan; B. Pan; P. J. Lee; M. S. Ghidaoui

Explanation for the frequency shift pattern of nonuniform blocked pipeline systems from an energy perspective

T. C. Che, H. F. Duan, B. Pan, P. J. Lee, M. S. Ghidaoui

Department of Civil and Environmental Engineering

Research output: Contribution to conference › Conference Paper › peer-review

Abstract

It was found in a previous study that the transient frequency shifts induced by nonuniform blockages in water pipelines become less evident as the frequency increases, but its physical mechanism is unclear. This paper explains this non-uniform blockage induced frequency shift pattern from an energy perspective. The results indicate that the non-uniform blockages have a less blocking effect on the propagation of high frequency waves; thus, the induced frequency shifts become less evident. In practical applications of non-uniform blockage detection, the frequency of the incident wave should be selected carefully to ensure that the reflected wave contains enough energy.

Original language	English
Pages	171-185
Number of pages	15
Publication status	Published - 2018
Event	13th International Conference on Pressure Surges - Bordeaux, France Duration: 14 Nov 2018 → 16 Nov 2018

Conference

Conference	13th International Conference on Pressure Surges
Country/Territory	France
City	Bordeaux
Period	14/11/18 → 16/11/18

Bibliographical note

Publisher Copyright:
© BHR Group 2018 Pressure Surges 13

Keywords

Energy transmission coefficient
Frequency shift
Non-uniform blockage
Transfer matrix
Transient
Water pipeline

Cite this

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title = "Explanation for the frequency shift pattern of nonuniform blocked pipeline systems from an energy perspective",

abstract = "It was found in a previous study that the transient frequency shifts induced by nonuniform blockages in water pipelines become less evident as the frequency increases, but its physical mechanism is unclear. This paper explains this non-uniform blockage induced frequency shift pattern from an energy perspective. The results indicate that the non-uniform blockages have a less blocking effect on the propagation of high frequency waves; thus, the induced frequency shifts become less evident. In practical applications of non-uniform blockage detection, the frequency of the incident wave should be selected carefully to ensure that the reflected wave contains enough energy.",

keywords = "Energy transmission coefficient, Frequency shift, Non-uniform blockage, Transfer matrix, Transient, Water pipeline",

author = "Che, \{T. C.\} and Duan, \{H. F.\} and B. Pan and Lee, \{P. J.\} and Ghidaoui, \{M. S.\}",

note = "Publisher Copyright: {\textcopyright} BHR Group 2018 Pressure Surges 13; 13th International Conference on Pressure Surges ; Conference date: 14-11-2018 Through 16-11-2018",

year = "2018",

language = "English",

pages = "171--185",

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TY - CONF

T1 - Explanation for the frequency shift pattern of nonuniform blocked pipeline systems from an energy perspective

AU - Che, T. C.

AU - Duan, H. F.

AU - Pan, B.

AU - Lee, P. J.

AU - Ghidaoui, M. S.

N1 - Publisher Copyright: © BHR Group 2018 Pressure Surges 13

PY - 2018

Y1 - 2018

N2 - It was found in a previous study that the transient frequency shifts induced by nonuniform blockages in water pipelines become less evident as the frequency increases, but its physical mechanism is unclear. This paper explains this non-uniform blockage induced frequency shift pattern from an energy perspective. The results indicate that the non-uniform blockages have a less blocking effect on the propagation of high frequency waves; thus, the induced frequency shifts become less evident. In practical applications of non-uniform blockage detection, the frequency of the incident wave should be selected carefully to ensure that the reflected wave contains enough energy.

AB - It was found in a previous study that the transient frequency shifts induced by nonuniform blockages in water pipelines become less evident as the frequency increases, but its physical mechanism is unclear. This paper explains this non-uniform blockage induced frequency shift pattern from an energy perspective. The results indicate that the non-uniform blockages have a less blocking effect on the propagation of high frequency waves; thus, the induced frequency shifts become less evident. In practical applications of non-uniform blockage detection, the frequency of the incident wave should be selected carefully to ensure that the reflected wave contains enough energy.

KW - Energy transmission coefficient

KW - Frequency shift

KW - Non-uniform blockage

KW - Transfer matrix

KW - Transient

KW - Water pipeline

UR - https://www.scopus.com/pages/publications/85059015538

M3 - Conference Paper

AN - SCOPUS:85059015538

SP - 171

EP - 185

T2 - 13th International Conference on Pressure Surges

Y2 - 14 November 2018 through 16 November 2018

ER -

Explanation for the frequency shift pattern of nonuniform blocked pipeline systems from an energy perspective

Abstract

Conference

Bibliographical note

Keywords

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Cite this