Thesis
Simulation of low-frequency waves propagating along water service pipelines
Master of Science (M.S.), Drexel University
Mar 2023
DOI:
https://doi.org/10.17918/00001578
Abstract
The material of water service pipelines is of crucial concern to the public health. Some materials including lead can lead to serious health diseases. Unfortunately, lead has been widely used for water service pipelines in the 1900s. Currently, identification of the material of the pipes is challenging since it requires costly excavation. Consequently, developing a new non-destructive method which allows us to easily distinguish between the materials is important. In this research, guided waves concept is considered as a possible tool to non destructively identify the material of buried pipelines. Simulations of wave propagation in pipes has been done in ABAQUS to extract the dispersion curves of pipe made of different materials and to explore possible guided modes that could be adopted to identify the material of service lines. Simulations have been completed using ABAQUS EXPLICIT to represent wave propagation in the water service pipelines. A Two-dimensional Fourier Transform is used to analyze time histories obtained by ABAQUS to extract the dispersion curves. The hypothesis is that by extracting the phase velocity of buried pipes in a given frequency range, classification of the various materials could be attempted. The suggested method provides promising results. However, there are few limitations and challenges. For empty pipes in vacuum, the phase velocity dispersion curves are easily extracted. When the pipe is filled with water, a small amount of energy will dissipate into the water region reducing the excitability of some modes. In the case of buried pipes, soil will pose multiple challenges as the energy carried along buried pipes will leak into the surrounding medium causing significant wave attenuation.
Metrics
20 File views/ downloads
36 Record Views
Details
- Title
- Simulation of low-frequency waves propagating along water service pipelines
- Creators
- Fatmah Hasan
- Contributors
- Ivan Bartoli (Advisor)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xii, 87 pages
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- Civil/Architectural/Environmental Engineering (1970-2026); College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991020340613004721