Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system
A rail system is the most important land transportation. Its safety and stability are critical. The rails are installed on discrete supports. In practice, there are several defects, such as loosening of fasteners and degradation of sleepers and blasters, frequently occurred on these supports. Curren...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2017
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| Online Access: | http://hdl.handle.net/10356/72744 |
| _version_ | 1811676862711070720 |
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| author | Wang, Longqi |
| author2 | Lie Seng Tjhen |
| author_facet | Lie Seng Tjhen Wang, Longqi |
| author_sort | Wang, Longqi |
| collection | NTU |
| description | A rail system is the most important land transportation. Its safety and stability are critical. The rails are installed on discrete supports. In practice, there are several defects, such as loosening of fasteners and degradation of sleepers and blasters, frequently occurred on these supports. Currently, the detection of defects relies mainly on visual inspection by trained personal. This study proposes a workable solution to detect these defects in view of their significant influences on the support stiffness between the rails and the discrete supports. The method only requires one sensor mounted on a moving device. Based on the numerical and experimental examples, degraded supports are located accurately, irrespective of the spatial distribution of degraded supports. The method performs well under periodic impact and random excitation and is far more efficient and accurate than visual inspection. |
| first_indexed | 2024-10-01T02:28:13Z |
| format | Thesis |
| id | ntu-10356/72744 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:28:13Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/727442023-03-03T19:07:05Z Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system Wang, Longqi Lie Seng Tjhen School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering A rail system is the most important land transportation. Its safety and stability are critical. The rails are installed on discrete supports. In practice, there are several defects, such as loosening of fasteners and degradation of sleepers and blasters, frequently occurred on these supports. Currently, the detection of defects relies mainly on visual inspection by trained personal. This study proposes a workable solution to detect these defects in view of their significant influences on the support stiffness between the rails and the discrete supports. The method only requires one sensor mounted on a moving device. Based on the numerical and experimental examples, degraded supports are located accurately, irrespective of the spatial distribution of degraded supports. The method performs well under periodic impact and random excitation and is far more efficient and accurate than visual inspection. Doctor of Philosophy (CEE) 2017-11-06T11:19:25Z 2017-11-06T11:19:25Z 2017 Thesis Wang, L. (2017). Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system. Doctoral thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/72744 10.32657/10356/72744 en 178 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering Wang, Longqi Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| title | Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| title_full | Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| title_fullStr | Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| title_full_unstemmed | Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| title_short | Vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| title_sort | vibration based moving inspection method to detect loose fasteners and damaged supports in a rail system |
| topic | DRNTU::Engineering::Civil engineering |
| url | http://hdl.handle.net/10356/72744 |
| work_keys_str_mv | AT wanglongqi vibrationbasedmovinginspectionmethodtodetectloosefastenersanddamagedsupportsinarailsystem |