Dynamic Simulation on High-Speed Rail Grinding Vehicle
In order to study the dynamic performance of the high-speed rail grinding vehicle in service,this paper establishes a model of it,considering the interactions between the grinding sub-vehicle and main vehicle,as well as between the grinding stones and rails.A dynamic simulation analysis is conducted to obtain the dynamic performance of the vehicle under different operational conditions on straight and curved tracks.The research findings indicate that the critical speeds of the main vehicle in self-propelled,non-operational,and operational states are 178 km/h,176 km/h,and 169 km/h respectively.The grinding sub-vehicle's critical speeds in non-operational and operational states are 145 km/h and 119 km/h respectively,satisfying the speed requirements of 80 km/h or above.When operating on curved tracks with different radii,the curve passing performance of both the main vehicle and the sub-vehicle improves with increasing curve radius,and both meet the standard requirements.When operating on curved tracks with different cant deficiencies,the curve passing performance of the grinding sub-vehicle in both operational and non-operational states is better when the cant deficiency is smaller.The impact of cant deficiency on operational state is relatively smaller than that in the non-operational state.The curve passing safety of the grinding sub-vehicle within the range of the cant deficiencies in this study meets the standard requirements.
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