- 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: | YANG Chunlei, WANG Kaiyun. Simulation Calculation Method and Application for Relative Displacement of Heavy Hall Freight Suspension on Curved Track[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1008-1016. doi: 10.3969/j.issn.0258-2724.20210158
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In order to accurately solve the relative displacements of heavy haul freight suspension on a curved track, firstly the mathematical model of curved track was established, and the formulas of outer rail superelevation, slope angle, roll angle and central angle with the length of curve were derived, then according to the time difference and the geometric position difference between the suspension components while the vehicle entering or leaving the curved track, programming to calculate the relative rail superelevation and angle difference of these rigid components. Secondly, the ontological coordinate system was established with the centroid of each rigid body as the origin, and the coordinate expressions of suspension points in the two ontology coordinate systems were given respectively, and converting these coordinates into a same coordinate system through coordinate transformation method, so the transient relative displacement of suspension points could be calculated. Finally, by combining the vehicle curving dynamics simulation, the dynamic relative displacements of suspension points could be calculated. The results indicate that the relative displacement of vehicle suspension is the result of the comprehensive action of vehicle parameters and curve track parameters, when the difference of roll angle difference, slope angle and central angle are excluded separately, the corresponding maximum deviation rate of relative suspension displacement can arrive at 42.85%, 24.03%, and 71.42%. The method of coordinate transformation combined with dynamic simulation can fully consider the vehicle and track parameters, and the relative displacement of vehicle suspension can be solved more accurately.
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