Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method
The wind tower block is welded with the flange to assemble the wind tower. The inherent strain due to local heating and cooling of the weld affects the flatness of the flange. Therefore, line heating is performed to satisfy the design criteria of the flange flatness, but the work variables depend on...
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MDPI AG
2022-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/22/7962 |
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| author | Hee-Chan Yoon Hun-Bong Lim Hong-Jun Noh Young-Hwan Han Jae-Chul Lee Hyun-Ik Yang |
| author_facet | Hee-Chan Yoon Hun-Bong Lim Hong-Jun Noh Young-Hwan Han Jae-Chul Lee Hyun-Ik Yang |
| author_sort | Hee-Chan Yoon |
| collection | DOAJ |
| description | The wind tower block is welded with the flange to assemble the wind tower. The inherent strain due to local heating and cooling of the weld affects the flatness of the flange. Therefore, line heating is performed to satisfy the design criteria of the flange flatness, but the work variables depend on the operator’s empirical judgment. This study proposed a method to determine the optimum linear heating conditions to control the welded flatness of wind tower blocks and flanges. A proposed method uses the inherent strain method, a simple analysis method, and the optimization is performed based on the deformation superposition method. The changes in flange flatness due to welding and single-point heating were calculated. Then, the flatness change due to single-point heating is superimposed with a scale factor, which represents the magnitude of line heating, and is added to the flatness change due to welding. Using the optimization procedure, the line heating conditions used to derive the flatness that satisfies the design criteria were derived and applied to the analytical model for verification. |
| first_indexed | 2024-03-09T18:13:16Z |
| format | Article |
| id | doaj.art-e45eb183c4cd4e659abb6c9be3cceaf6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:13:16Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e45eb183c4cd4e659abb6c9be3cceaf62023-11-24T09:01:52ZengMDPI AGMaterials1996-19442022-11-011522796210.3390/ma15227962Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary MethodHee-Chan Yoon0Hun-Bong Lim1Hong-Jun Noh2Young-Hwan Han3Jae-Chul Lee4Hyun-Ik Yang5Department of Mechanical Design Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaDepartment of Mechanical Design Engineering, Myongji College, 134, Gajwa-ro, Seodaemun-gu, Seoul 03656, KoreaDepartment of Mechanical Design Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaDepartment of Mechanical Design Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaMaterial & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Hanggaul-ro 143, Sangnok-gu, Ansan-si 15588, KoreaDepartment of Mechanical Design Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaThe wind tower block is welded with the flange to assemble the wind tower. The inherent strain due to local heating and cooling of the weld affects the flatness of the flange. Therefore, line heating is performed to satisfy the design criteria of the flange flatness, but the work variables depend on the operator’s empirical judgment. This study proposed a method to determine the optimum linear heating conditions to control the welded flatness of wind tower blocks and flanges. A proposed method uses the inherent strain method, a simple analysis method, and the optimization is performed based on the deformation superposition method. The changes in flange flatness due to welding and single-point heating were calculated. Then, the flatness change due to single-point heating is superimposed with a scale factor, which represents the magnitude of line heating, and is added to the flatness change due to welding. Using the optimization procedure, the line heating conditions used to derive the flatness that satisfies the design criteria were derived and applied to the analytical model for verification.https://www.mdpi.com/1996-1944/15/22/7962flatnesstilt angleline heatingstrain as direct boundary |
| spellingShingle | Hee-Chan Yoon Hun-Bong Lim Hong-Jun Noh Young-Hwan Han Jae-Chul Lee Hyun-Ik Yang Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method Materials flatness tilt angle line heating strain as direct boundary |
| title | Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method |
| title_full | Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method |
| title_fullStr | Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method |
| title_full_unstemmed | Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method |
| title_short | Determination of Optimal Line-Heating Conditions for Flatness Control of Wind Tower Blocks Using Strain as Direct Boundary Method |
| title_sort | determination of optimal line heating conditions for flatness control of wind tower blocks using strain as direct boundary method |
| topic | flatness tilt angle line heating strain as direct boundary |
| url | https://www.mdpi.com/1996-1944/15/22/7962 |
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