Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body
The locomotive is in development of high speed and heavy load and the designed running speed is continuously increased, which leads to the challenges in the fatigue evaluations of locomotive body. Fatigue evaluation is the key component for locomotive design, which takes the key role for the working...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Drive for Locomotives
2022-01-01
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| Series: | 机车电传动 |
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| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2022.01.015 |
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| author | GUO Chong WANG Qian HAN Pengfei LI Jiarui WANG Yifei ZHANG Zhao |
| author_facet | GUO Chong WANG Qian HAN Pengfei LI Jiarui WANG Yifei ZHANG Zhao |
| author_sort | GUO Chong |
| collection | DOAJ |
| description | The locomotive is in development of high speed and heavy load and the designed running speed is continuously increased, which leads to the challenges in the fatigue evaluations of locomotive body. Fatigue evaluation is the key component for locomotive design, which takes the key role for the working safety of the locomotive. The local model of weld in different types was established in finite element model of the exported CEA3<sub>A1</sub> AC-drive passenger electric locomotive body. BS EN 12663-1: 2010 was used to establish the 8 fatigue load cases. TB/T 3548—2019 was used to select the FAT90 fatigue curve for the fatigue evaluations. The effects of the weld toe sizes on the fatigue evaluations of the locomotive body were further investigated. Based on the obtained data, the calculate model of original design standard was revised, the computational model of weld can be improved with consideration of the weld shapes, which was successfully applied to the CEA3<sub>A1</sub> AC-drive passenger electric locomotive body. Results indicate that the effect of weld toe on stress can be related with the weld toe sizes and the stress levels of the weld. Under the condition of full penetration, the weld can lead to the increase of the geometrical area of the joint causing the increase of the loading area. This is the reason for the decrease of the stresses of the weld. Under the condition of the elimination of the mesh sensitivity, the stress level of the weld can be decreased effectively with consideration of the effect of the weld toe in the establishment of models. This means that the computation is generally conservative without consideration of the weld toe. The modified formula on the effect of weld toe size on the stress was proposed to consider the effect of the weld toe in the computational model. It was found that 3×3 mm weld toe can lead to the thinning effects of the joint plates by 43.3% and 32.5% keeping the same fatigue stresses on the weld, 5×5 mm weld toe can lead to the thinning effects of the joint plates by 46.7% and 35.0%. This means that the structure weight near the joint can be optimally decreased with consideration of the weld toe strengthening effect. |
| format | Article |
| id | doaj-art-398a1f1972f54837b434278028ae00a6 |
| institution | Kabale University |
| issn | 1000-128X |
| language | zho |
| publishDate | 2022-01-01 |
| publisher | Editorial Department of Electric Drive for Locomotives |
| record_format | Article |
| series | 机车电传动 |
| spelling | doaj-art-398a1f1972f54837b434278028ae00a62025-08-20T03:48:58ZzhoEditorial Department of Electric Drive for Locomotives机车电传动1000-128X2022-01-01919723979206Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive bodyGUO ChongWANG QianHAN PengfeiLI JiaruiWANG YifeiZHANG ZhaoThe locomotive is in development of high speed and heavy load and the designed running speed is continuously increased, which leads to the challenges in the fatigue evaluations of locomotive body. Fatigue evaluation is the key component for locomotive design, which takes the key role for the working safety of the locomotive. The local model of weld in different types was established in finite element model of the exported CEA3<sub>A1</sub> AC-drive passenger electric locomotive body. BS EN 12663-1: 2010 was used to establish the 8 fatigue load cases. TB/T 3548—2019 was used to select the FAT90 fatigue curve for the fatigue evaluations. The effects of the weld toe sizes on the fatigue evaluations of the locomotive body were further investigated. Based on the obtained data, the calculate model of original design standard was revised, the computational model of weld can be improved with consideration of the weld shapes, which was successfully applied to the CEA3<sub>A1</sub> AC-drive passenger electric locomotive body. Results indicate that the effect of weld toe on stress can be related with the weld toe sizes and the stress levels of the weld. Under the condition of full penetration, the weld can lead to the increase of the geometrical area of the joint causing the increase of the loading area. This is the reason for the decrease of the stresses of the weld. Under the condition of the elimination of the mesh sensitivity, the stress level of the weld can be decreased effectively with consideration of the effect of the weld toe in the establishment of models. This means that the computation is generally conservative without consideration of the weld toe. The modified formula on the effect of weld toe size on the stress was proposed to consider the effect of the weld toe in the computational model. It was found that 3×3 mm weld toe can lead to the thinning effects of the joint plates by 43.3% and 32.5% keeping the same fatigue stresses on the weld, 5×5 mm weld toe can lead to the thinning effects of the joint plates by 46.7% and 35.0%. This means that the structure weight near the joint can be optimally decreased with consideration of the weld toe strengthening effect.http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2022.01.015electric locomotivefatigue assessmentweld seamweld toefinite element |
| spellingShingle | GUO Chong WANG Qian HAN Pengfei LI Jiarui WANG Yifei ZHANG Zhao Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body 机车电传动 electric locomotive fatigue assessment weld seam weld toe finite element |
| title | Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body |
| title_full | Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body |
| title_fullStr | Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body |
| title_full_unstemmed | Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body |
| title_short | Fatigue evaluation of CEA3<sub>A1</sub> AC-drive passenger electric locomotive body |
| title_sort | fatigue evaluation of cea3 sub a1 sub ac drive passenger electric locomotive body |
| topic | electric locomotive fatigue assessment weld seam weld toe finite element |
| url | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2022.01.015 |
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