Effect of wheel/rail wear and suspension system failureon vehicle dynamics performance
In order to study the influence of wheel/rail wear on the dynamics performance of the vehicle system, build high-speed vehicle system dynamics model, carry out wheel rail contact geometry relation and dynamic simulation calculation for new wheel/rail, wore wheel/rail and reprofile wheel/rail. In addition, analyze the change of vehicle dynamics performance for wheel-rail relationship after wear, when the parameters of the suspension system are failed. The results indicate that: different profile matching of wheel/rail, on wheel/rail wear condition, equivalent conicity, rolling radius difference and left and right wheel-rail contact angle difference are maximum; instability critical speed decreases due to wheel-rail wear, and riding quality and curve negotiation ability become worse; the influence of wheel-rail wear should be considered in vehicle system simulation; the wheel-rail contact geometry relationship and dynamics performance of the vehicle can be improved effectively by timely wheel reprofiling or rail grinding; the influence of wheel-rail wear should be considered when dynamics performance become worse on fault conditions and vehicle suspension parameters are optimized.
Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
In order to study the influence of wheel/rail wear on the dynamics performance of the vehicle system, build high-speed vehicle system dynamics model, carry out wheel rail contact geometry relation and dynamic simulation calculation for new wheel/rail, wore wheel/rail and reprofile wheel/rail. In addition, analyze the change of vehicle dynamics performance for wheel-rail relationship after wear, when the parameters of the suspension system are failed. The results indicate that: different profile matching of wheel/rail, on wheel/rail wear condition, equivalent conicity, rolling radius difference and left and right wheel-rail contact angle difference are maximum; instability critical speed decreases due to wheel-rail wear, and riding quality and curve negotiation ability become worse; the influence of wheel-rail wear should be considered in vehicle system simulation; the wheel-rail contact geometry relationship and dynamics performance of the vehicle can be improved effectively by timely wheel reprofiling or rail grinding; the influence of wheel-rail wear should be considered when dynamics performance become worse on fault conditions and vehicle suspension parameters are optimized.
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