Optimization on parameters and analysis on dynamics performance of high-speed electric locomotive

On the basis of a new theory of vehicletrack coupling dynamics, the effects of suspension and structure parameters on critical speed of "Tiansuo" type electric locomotive are studied with the dynamic simulation software TTISIM, which is verified by various field experiments. The dynamics performances of locomotive running on elastic track are simulated and evaluated systemically by using the railway vehicles specification for evaluation of dynamics performance and accreditation test. Simulation and evaluation results show that reasonable parameters can improve the hunting stability of locomotive, and the optimized locomotive is more suitable for high-speed railway transportation.