Optimization of Third Rail End Elbow Based on NURBS
[Objective] In order to improve the collision performance of the end elbow of the shoe-rail system and enhance the current collection quality, it is necessary to carry out the optimization research on the third-rail end elbow based on NURBS (Non-Uniform Rational B-Spline). [Method] Taking the end el...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Urban Mass Transit Magazine Press
2025-05-01
|
| Series: | Chengshi guidao jiaotong yanjiu |
| Subjects: | |
| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.05.037.html |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849312305542594560 |
|---|---|
| author | RUAN Jie ZHONG Zhuolin WANG Bingqin LI Hongmei XU Hongyan YAN Xiaohui |
| author_facet | RUAN Jie ZHONG Zhuolin WANG Bingqin LI Hongmei XU Hongyan YAN Xiaohui |
| author_sort | RUAN Jie |
| collection | DOAJ |
| description | [Objective] In order to improve the collision performance of the end elbow of the shoe-rail system and enhance the current collection quality, it is necessary to carry out the optimization research on the third-rail end elbow based on NURBS (Non-Uniform Rational B-Spline). [Method] Taking the end elbow of a certain metro line in Wuhan as example, an optimization design for the end elbow is carried out based on the concepts of parametric design and multi-objective optimization. According to the collision simulation of the end elbow of the shoe-rail system under the working condition of 120 km/h train running speed, the evaluation indicators of the current collection quality of the shoe-rail system under high speed working conditions are determined. The cross-section stretching curve of the end elbow is established through NURBS. A finite-element model of the curved end elbow is established by using the ANSYS Parametric Design Language. Taking the control point coordinates of the cross-section stretching curve as design variables, the optimization objectives are selected through main effect analysis, and the value range of the design variables is clarified. Based on NSGA-II (Non-dominated Sorting Genetic Algorithm II), a multi-objective optimization model of the curved end elbow is established, and the optimal solution is selected through the non-dominated sorting method and the min-max regret value method. [Result & Conclusion] According to the results of the main effect analysis, the bending-in collision force, bending-out collision force, total offline time, and the maximum impact acceleration are selected as the optimization objectives, and the maximum single offline time and the number of collisions are taken as the constraint conditions. After optimization, the current collection quality of the end elbow of the shoe-rail system is improved. When the train running speed is 120 km/h, the total offline time and the maximum single offline time are significantly optimized, with a reduction of 80.77% and 89.96% respectively. The corner entry impact force and the corner exit impact force are reduced by 32.26% and 44.03% respectively. When the train running speeds are 40 km/h and 80 km/h, all indicators are reduced by more than 20%. |
| format | Article |
| id | doaj-art-00ca03a77aca4e71a5a14eb30eb10c71 |
| institution | Kabale University |
| issn | 1007-869X |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Urban Mass Transit Magazine Press |
| record_format | Article |
| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-00ca03a77aca4e71a5a14eb30eb10c712025-08-20T03:53:07ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2025-05-0128521822510.16037/j.1007-869x.2025.05.037Optimization of Third Rail End Elbow Based on NURBSRUAN Jie0ZHONG Zhuolin1WANG Bingqin2LI Hongmei3XU Hongyan4YAN Xiaohui5Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, 430070, Wuhan, ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, 430070, Wuhan, ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, 430070, Wuhan, ChinaElectrification Design and Research Institute, China Railway Siyuan Survey and Design Group Co., Ltd., 430063, Wuhan, ChinaElectrification Design and Research Institute, China Railway Siyuan Survey and Design Group Co., Ltd., 430063, Wuhan, ChinaWuhan Metro Operation Co., Ltd., 430035, Wuhan, China[Objective] In order to improve the collision performance of the end elbow of the shoe-rail system and enhance the current collection quality, it is necessary to carry out the optimization research on the third-rail end elbow based on NURBS (Non-Uniform Rational B-Spline). [Method] Taking the end elbow of a certain metro line in Wuhan as example, an optimization design for the end elbow is carried out based on the concepts of parametric design and multi-objective optimization. According to the collision simulation of the end elbow of the shoe-rail system under the working condition of 120 km/h train running speed, the evaluation indicators of the current collection quality of the shoe-rail system under high speed working conditions are determined. The cross-section stretching curve of the end elbow is established through NURBS. A finite-element model of the curved end elbow is established by using the ANSYS Parametric Design Language. Taking the control point coordinates of the cross-section stretching curve as design variables, the optimization objectives are selected through main effect analysis, and the value range of the design variables is clarified. Based on NSGA-II (Non-dominated Sorting Genetic Algorithm II), a multi-objective optimization model of the curved end elbow is established, and the optimal solution is selected through the non-dominated sorting method and the min-max regret value method. [Result & Conclusion] According to the results of the main effect analysis, the bending-in collision force, bending-out collision force, total offline time, and the maximum impact acceleration are selected as the optimization objectives, and the maximum single offline time and the number of collisions are taken as the constraint conditions. After optimization, the current collection quality of the end elbow of the shoe-rail system is improved. When the train running speed is 120 km/h, the total offline time and the maximum single offline time are significantly optimized, with a reduction of 80.77% and 89.96% respectively. The corner entry impact force and the corner exit impact force are reduced by 32.26% and 44.03% respectively. When the train running speeds are 40 km/h and 80 km/h, all indicators are reduced by more than 20%.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.05.037.htmlmetroend elbownurbsmulti-objective optimization |
| spellingShingle | RUAN Jie ZHONG Zhuolin WANG Bingqin LI Hongmei XU Hongyan YAN Xiaohui Optimization of Third Rail End Elbow Based on NURBS Chengshi guidao jiaotong yanjiu metro end elbow nurbs multi-objective optimization |
| title | Optimization of Third Rail End Elbow Based on NURBS |
| title_full | Optimization of Third Rail End Elbow Based on NURBS |
| title_fullStr | Optimization of Third Rail End Elbow Based on NURBS |
| title_full_unstemmed | Optimization of Third Rail End Elbow Based on NURBS |
| title_short | Optimization of Third Rail End Elbow Based on NURBS |
| title_sort | optimization of third rail end elbow based on nurbs |
| topic | metro end elbow nurbs multi-objective optimization |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.05.037.html |
| work_keys_str_mv | AT ruanjie optimizationofthirdrailendelbowbasedonnurbs AT zhongzhuolin optimizationofthirdrailendelbowbasedonnurbs AT wangbingqin optimizationofthirdrailendelbowbasedonnurbs AT lihongmei optimizationofthirdrailendelbowbasedonnurbs AT xuhongyan optimizationofthirdrailendelbowbasedonnurbs AT yanxiaohui optimizationofthirdrailendelbowbasedonnurbs |