- 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: | ZENG Luqing, CUI Dabin, LI Li. Rail Grinding Model Based on Mechanical-Electric-Hydraulic Coupling[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20220577
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Rail grinding occurs when the rail grinder is in traveling status, which is affected by the dynamic performance of the vehicle. Rail grinding is generally set as constant power grinding, involving a wheel-track contact relationship, wheel-track grinding relationship, hydraulic system, and control system. It is a mechanical-electric-hydraulic coupling process. The whole model of rail grinding based on mechanical-electric-hydraulic coupling was formed by considering the mechanical-electric-hydraulic coupling of the rail grinding process on the basis of vehicle-track coupling dynamics. This model included a vehicle-track coupling dynamics submodel, wheel-track contact submodel, grinding submodel, and hydraulic system submodel. This rail grinding model was validated by comparing it with experimental data. The results show that in vehicle-track dynamics model verification, the maximum deviation of derailment coefficient is 11.11%, and the maximum deviation of wheel unloading rate is 7.69%. The maximum deviation of the lateral force of the wheel is 11.68%. In hydraulic and control model verification, under 0.7 Hz and 1.7 Hz rail corrugation, the deviation range of pressure in the rodless cavity are between (−2.96%–2.92%) and (−0.32%–1.38%), and the deviation range of flow in the rodless cavity are between (−24.11%–0) and (−48.72%–0). In grinding model verification, the trend is generally consistent, with a deviation of 0.036 mm at the point of maximum deviation. The above deviations are all within the acceptable range, proving that this model can be applied to practical rail grinding study.
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