Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A comparative study of multiple branched pipes detection method through transient analysis and experiment with sensitivity analysis

단순 관망시스템에서의 천이류 해석 및 실험을 통한 가지관 탐색법 비교와 민감도 연구

  • Dongwon Ko (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Dahong Kim (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Bongseog Jung (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Sanghyun Jeong (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Sanghyun Kim (Department of Civil and Environmental Engineering, Pusan National University)
  • 고동원 (부산대학교 사회환경시스템공학과) ;
  • 김다홍 (부산대학교 사회환경시스템공학과) ;
  • 정봉석 (부산대학교 사회환경시스템공학과) ;
  • 정상현 (부산대학교 사회환경시스템공학과) ;
  • 김상현 (부산대학교 사회환경시스템공학과)
  • Received : 2025.11.06
  • Accepted : 2025.12.27
  • Published : 2026.02.15
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Abstract

Branched pipes in water distribution network are essential for delivering water from trunk mains to consumers, yet some are illegally connected or poorly documented, reducing system efficiency. This study examines a method to detect multiple branched pipes in a simple pipeline system using both numerical transient analysis and physical experiment. The main objective is to investigate the feasibility of transient-based detection and to assess the sensitivity associated with pipe parameters. The developed approach integrates the conventional method of characteristic with a nonlinear pressure-response model representing real ball valve maneuver. Both the numerical analysis and laboratory experiment were conducted on a pilot-scale system containing two branched pipes, while accounting for inherent experimental uncertainties. Distinct pressure signatures observed in both approaches demonstrate the potential of the proposed method for detecting multiple branched pipes. The results also reveal that the detection performance is highly sensitive to heterogeneous wave speeds and inconsistent transient initiation within the pipeline system.

배수 관망에서 가지관은 주 송수관에서 물을 주민에게 공급하는 핵심 요소이나, 일부는 불법적으로 사용되거나 정보가 불확실하여 관망 운영 효율을 저하시킨다. 본 연구는 단순 관망을 대상으로 천이류 해석과 실험을 통해 다중 가지관 탐지 기법을 검증하였다. 연구목적은 천이류 기반 가지관 탐색법의 적용 가능성을 평가하고, 관로 매개변수의 민감성을 분석하는 것이다. 개발된 방법은 단순 관로에서 전통적인 특성선 방법에 볼밸브의 비선형 거동 분석을 연계해 해석했다. 해석과 실험은 동일한 관망에서 두 개의 가지관을 대상으로 수행되었으며, 실험 내재 불확실성을 고려하였다. 두 분석 모두에서 구별 가능한 압력 신호가 확인되어 제안된 방법의 가지관 탐지 가능성을 입증하였다. 또한 결과는 불균일한 파속도와 일관되지 않은 천이류 유입 조건이 탐지 성능에 큰 영향을 미치는 것으로 나타났다.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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