Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography
Welding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assem...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/9/11/1211 |
| _version_ | 1797509764440129536 |
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| author | So-Yeon Baek Jong-Ho Nam |
| author_facet | So-Yeon Baek Jong-Ho Nam |
| author_sort | So-Yeon Baek |
| collection | DOAJ |
| description | Welding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assembly man-hours. Currently, major shipyards calculate welding man-hours by reflecting the welding factor, which is defined as the working time consumed in the welding process. A set of welding factors is known to be based on the accumulated experience in shipyards, whereas the verification or derivation process for these factors is not disclosed or available. This study proposed a method for quantitatively calculating work difficulty for welding positions based on the working posture in a process where the posture acts as an important variable. Standard welding positions reflecting the actual welding work at shipyards were established. A physiological assessment method was used to propose the physical welding factor by analyzing the measured muscle activity. The validity of the proposed method was verified by comparing the results of a musculoskeletal simulation package and shipyard welding factors. The proposed method can be readily applied to other fields in which workers’ physical activities are involved. |
| first_indexed | 2024-03-10T05:22:21Z |
| format | Article |
| id | doaj.art-1a342b38310b4d52afd1df4b6a19b566 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T05:22:21Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-1a342b38310b4d52afd1df4b6a19b5662023-11-22T23:53:25ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-11-01911121110.3390/jmse9111211Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface ElectromyographySo-Yeon Baek0Jong-Ho Nam1Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime & Ocean University, Busan 49112, KoreaDepartment of Naval Architecture and Ocean Systems Engineering, Korea Maritime & Ocean University, Busan 49112, KoreaWelding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assembly man-hours. Currently, major shipyards calculate welding man-hours by reflecting the welding factor, which is defined as the working time consumed in the welding process. A set of welding factors is known to be based on the accumulated experience in shipyards, whereas the verification or derivation process for these factors is not disclosed or available. This study proposed a method for quantitatively calculating work difficulty for welding positions based on the working posture in a process where the posture acts as an important variable. Standard welding positions reflecting the actual welding work at shipyards were established. A physiological assessment method was used to propose the physical welding factor by analyzing the measured muscle activity. The validity of the proposed method was verified by comparing the results of a musculoskeletal simulation package and shipyard welding factors. The proposed method can be readily applied to other fields in which workers’ physical activities are involved.https://www.mdpi.com/2077-1312/9/11/1211welding factorworking posturestandard welding positionelectromyographymuscle activityshipbuilding assembly process |
| spellingShingle | So-Yeon Baek Jong-Ho Nam Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography Journal of Marine Science and Engineering welding factor working posture standard welding position electromyography muscle activity shipbuilding assembly process |
| title | Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography |
| title_full | Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography |
| title_fullStr | Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography |
| title_full_unstemmed | Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography |
| title_short | Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography |
| title_sort | physical welding factors for reclassified welding positions in shipbuilding assembly process based on muscle activity measured by surface electromyography |
| topic | welding factor working posture standard welding position electromyography muscle activity shipbuilding assembly process |
| url | https://www.mdpi.com/2077-1312/9/11/1211 |
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