Interaction of typical wheel-rail periodic wears of high-speed railway under extreme condition
The wheel polygon and rail corrugation as typical wheel-rail periodic wear of high-speed railway,aggravate wheel-rail vibration and affect driving safety.In order to explore the interaction under extreme conditions when wheel polygon and rail corrugation coexist,firstly,considering wheel-rail periodic wear of high-speed railway,the finite element model of wheel-rail system is established,and the frequency-dependent wheel-rail periodic wear competition mechanism is explored.Then,from the perspective of frequency-dependent wheel-rail periodic wears,the wheel-rail friction coupling vibration characteristics of wheel-rail periodic wears in the same/different phase contact are compared.Finally,from the perspective of frequency-independent wheel-rail periodic wears,the wheel-rail friction coupling vibration characteristics of the interaction of wheel-rail periodic wear are studied.Results show that under the extreme conditions of the coexistence of frequency-dependent wheel polygon and rail corrugation,the wheel-rail system is the most unstable.The instability of the wheel-rail system will be aggravated when the frequency-dependent wheel-rail periodic wear are in the same phase,and with the increase of wave depth,the difference in wheel-rail friction coupling vibration between the same phase and different phase will be increased.the closer the frequency-independent periodic wear frequency of wheel-rail is,the more obvious the influence on the stability of wheel-rail system is.
万方数据
维普
