A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification
The identification of longitudinal bending moments is a critical component in the health monitoring of ship structures. This study examines the effect of the failure of measurement points on the accuracy of bending moment identification and presents a solution using an XGboost fitting method. The im...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/12/2282 |
| _version_ | 1827574504409268224 |
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| author | Gengdu Xu Jin Gan Jun Li Huabing Liu Weiguo Wu |
| author_facet | Gengdu Xu Jin Gan Jun Li Huabing Liu Weiguo Wu |
| author_sort | Gengdu Xu |
| collection | DOAJ |
| description | The identification of longitudinal bending moments is a critical component in the health monitoring of ship structures. This study examines the effect of the failure of measurement points on the accuracy of bending moment identification and presents a solution using an XGboost fitting method. The impact of failure point position and quantity on strain fitting accuracy and bending moment identification was investigated by performing a four-point bending experiment in typical failure scenarios. Further numerical analysis was conducted to identify potential sources of errors in the measurement process. Additionally, several XGBoost-based fitting schemes were tested under practical conditions to provide reliable fitting suggestions. The results indicated that the XGboost strain fitting method outperforms conventional methods for removing failed measurement points, resulting in improved accuracy of identification. When the most critical failure condition occurs (i.e., the deck plate measurement points and deck stiffener measurement points fail), the XGboost method can still estimate the strain at the failure points with acceptable accuracy. These results also hold in complex load scenarios. Moreover, in the practical measurement conditions, the arrangement of measuring points includes two sections that are sufficient to support the fitting of failed measurement points by using the XGboost method. The XGboost strain fitting method exhibits promising potential in strain fitting applications. |
| first_indexed | 2024-03-08T20:38:08Z |
| format | Article |
| id | doaj.art-a6a65a95680e4563975f8d171bc3f34e |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-08T20:38:08Z |
| publishDate | 2023-11-01 |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-a6a65a95680e4563975f8d171bc3f34e2023-12-22T14:18:48ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-11-011112228210.3390/jmse11122282A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment IdentificationGengdu Xu0Jin Gan1Jun Li2Huabing Liu3Weiguo Wu4Key Laboratory of High Performance Ship Technology, Wuhan University of Technology, Ministry of Education, Wuhan 430063, ChinaKey Laboratory of High Performance Ship Technology, Wuhan University of Technology, Ministry of Education, Wuhan 430063, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaGreen & Smart River-Sea-Going Ship, Cruise and Yacht Research Centre, Wuhan University of Technology, Wuhan 430063, ChinaKey Laboratory of High Performance Ship Technology, Wuhan University of Technology, Ministry of Education, Wuhan 430063, ChinaThe identification of longitudinal bending moments is a critical component in the health monitoring of ship structures. This study examines the effect of the failure of measurement points on the accuracy of bending moment identification and presents a solution using an XGboost fitting method. The impact of failure point position and quantity on strain fitting accuracy and bending moment identification was investigated by performing a four-point bending experiment in typical failure scenarios. Further numerical analysis was conducted to identify potential sources of errors in the measurement process. Additionally, several XGBoost-based fitting schemes were tested under practical conditions to provide reliable fitting suggestions. The results indicated that the XGboost strain fitting method outperforms conventional methods for removing failed measurement points, resulting in improved accuracy of identification. When the most critical failure condition occurs (i.e., the deck plate measurement points and deck stiffener measurement points fail), the XGboost method can still estimate the strain at the failure points with acceptable accuracy. These results also hold in complex load scenarios. Moreover, in the practical measurement conditions, the arrangement of measuring points includes two sections that are sufficient to support the fitting of failed measurement points by using the XGboost method. The XGboost strain fitting method exhibits promising potential in strain fitting applications.https://www.mdpi.com/2077-1312/11/12/2282ship structure health monitoringlongitudinal bending moment identificationXGboost fittingfour-point bending experimentinfluence coefficient matrix |
| spellingShingle | Gengdu Xu Jin Gan Jun Li Huabing Liu Weiguo Wu A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification Journal of Marine Science and Engineering ship structure health monitoring longitudinal bending moment identification XGboost fitting four-point bending experiment influence coefficient matrix |
| title | A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification |
| title_full | A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification |
| title_fullStr | A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification |
| title_full_unstemmed | A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification |
| title_short | A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification |
| title_sort | strain fitting strategy to eliminate the impact of measuring points failure in longitudinal bending moment identification |
| topic | ship structure health monitoring longitudinal bending moment identification XGboost fitting four-point bending experiment influence coefficient matrix |
| url | https://www.mdpi.com/2077-1312/11/12/2282 |
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