Dynamic Analysis of a Novel Rail-Grinding Car Using Open-Structured Abrasive Belt for High-Speed Railways

摘要

Nowadays, applying rail grinding has been worldwide recognized as the routine maintenance approach to improving the wheel-rail relationship, as well as extending the rail's serving life. However, the traditional rail repair technology with the abrasive wheel or the milling cutter is getting harder to meet the increasing demand for high efficiency with high speed. In this paper, according to the engineering requirements and constraints, a new fast rail-grinding car based on open-structured belt grinding technology was designed for the corrugation treatment on high-speed railways. A corresponding simulation model was established and its dynamic working performance was then assessed by SIMPACK software. Results of the four dynamic indices for both straight and curve tracks were within the limits, which had verified the design rationality of the new rail-grinding car. Those dynamic indices are the lateral vibration acceleration, the vertical vibration acceleration, the axle transverse force, and the derailment coefficient.