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Y. Li^1,2,3, Y. Qian^1,3, Z. Liu^1,3, J. Xu^1,3, R. Chen^1,3 and Y. Luo^1,3

¹School of Civil Engineering, Southwest Jiaotong University, Chengdu, China
²School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou, China
³Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, China

Keywords: vehicle operational stability, driving speed, wheel profile, rail profile, significant factor selection, large-size turnout.

Abstract

At present, there are many cases of lateral vibration acceleration exceeding the limit when a high-speed vehicle passes the large-size turnout in the diverging route, which affects the smoothness of vehicle operation and the comfort of passengers. Therefore, this paper proposes a vehicle-turnout coupled dynamic model considering both rigid and flexible characteristics. By utilizing orthogonal experiments and the Plackett-Burman saturated fractional factorial design method, the lateral vibration acceleration of the vehicle body and the Sperling lateral stability index are selected as the observed variables. Employing the graphical analysis method, significant influential factors affecting the vehicle operational stability of high-speed vehicle passes large-size turnout in the diverging route are identified. The results show that: 1) The driving speed has a pronounced influence on various aspects, including lateral wheel-rail forces, bogie vibration acceleration, lateral vibration acceleration of the vehicle body, and the lateral Sperling stability index, 2) The wheel profile exerts a significant impact on the lateral wheel-rail forces and the lateral vibration acceleration of the bogie. However, its influence on the lateral vibration acceleration of the vehicle body and the lateral Sperling stability index is relatively negligible, 3) The influence of rail profile on frame transverse vibration acceleration and body transverse vibration acceleration is more obvious. Under the rail abrasion condition, the frame transverse vibration acceleration increased by 69.36% compared with the standard profile, and the maximum value of body transverse vibration acceleration increased by 31.87% compared with the standard profile.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 22.1 Study on the Significant Influencing Factors on Vehicle Operational Stability in Large-Size Turnout Areas Y. Li^1,2,3, Y. Qian^1,3, Z. Liu^1,3, J. Xu^1,3, R. Chen^1,3 and Y. Luo^1,3 ¹School of Civil Engineering, Southwest Jiaotong University, Chengdu, China ²School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou, China ³Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, China doi:10.4203/ccc.7.22.1 Full Bibliographic Reference for this paper Y. Li, Y. Qian, Z. Liu, J. Xu, R. Chen, Y. Luo, "Study on the Significant Influencing Factors on Vehicle Operational Stability in Large-Size Turnout Areas", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 22.1, 2024, doi:10.4203/ccc.7.22.1 Keywords: vehicle operational stability, driving speed, wheel profile, rail profile, significant factor selection, large-size turnout. Abstract At present, there are many cases of lateral vibration acceleration exceeding the limit when a high-speed vehicle passes the large-size turnout in the diverging route, which affects the smoothness of vehicle operation and the comfort of passengers. Therefore, this paper proposes a vehicle-turnout coupled dynamic model considering both rigid and flexible characteristics. By utilizing orthogonal experiments and the Plackett-Burman saturated fractional factorial design method, the lateral vibration acceleration of the vehicle body and the Sperling lateral stability index are selected as the observed variables. Employing the graphical analysis method, significant influential factors affecting the vehicle operational stability of high-speed vehicle passes large-size turnout in the diverging route are identified. The results show that: 1) The driving speed has a pronounced influence on various aspects, including lateral wheel-rail forces, bogie vibration acceleration, lateral vibration acceleration of the vehicle body, and the lateral Sperling stability index, 2) The wheel profile exerts a significant impact on the lateral wheel-rail forces and the lateral vibration acceleration of the bogie. However, its influence on the lateral vibration acceleration of the vehicle body and the lateral Sperling stability index is relatively negligible, 3) The influence of rail profile on frame transverse vibration acceleration and body transverse vibration acceleration is more obvious. Under the rail abrasion condition, the frame transverse vibration acceleration increased by 69.36% compared with the standard profile, and the maximum value of body transverse vibration acceleration increased by 31.87% compared with the standard profile. download the full-text of this paper (PDF, 1617 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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