- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | CHEN Yu, AN Boyang, PAN Zili, MO Hongyuan, WANG Ping, FANG Jiasheng, QIAN Yao, XU Jingmang. Analysis of Wheel-Rail Contact and Wear Considering Variable Cross-Sections of Switch Rail[J]. Journal of Southwest Jiaotong University, 2022, 57(6): 1250-1258. doi: 10.3969/j.issn.0258-2724.20210040
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To investigate the influence of variable switch rail cross-sections on wheel-rail contact behaviors and the wear distribution of the curved switch rail, a three dimensional (3D) asymmetric contact geometry method for the turnout area was proposed, which could calculate the real normal gap between the wheel and curved switch rail. The vehicle-turnout multi-body dynamics model was initially built by SIMPACK to obtain simulated results. And then the wear depth of the curved switch rail was calculated by the contact model considering variable cross-sections and the USFD wear model proposed by University of Sheffield. The results show that: 1) Taking the S1002CN wheel profile and No. 12 curved switch rail for examples, both the wheel-set yaw angle and variable cross-sections result in the asymmetric distribution of wheel-rail normal gap along the longitudinal direction within the contact patch. Therefore, the normal gap causes the contact patch shape and stress distribution asymmetric along the longitudinal direction within the contact patch. When the wheel-set yaw angle is 10 mrad and the lateral displacement is 7.5 mm, the area of contact patch obtained by the proposed method is 9.2% larger than that solved by the simplified method without considering the variable cross-sections and yaw angle. 2) Taking the CRH3 vehicle and No.12 curved switch blades as the research objects, the maximum wear depth calculated by the simplified method is 0.75 times as large as that according to the proposed method.
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