The Impact Of Suspension Parameters On The Dynamic Performance Of High-Power Locomotives With Different Axle Load

With the sustainable development of national economy, cargo traffic increased year by year. In order to solve the serious problem between transportation capacity and transportation volume, make full use of high-power locomotives and enhance the locomotive adhesion, large axle-loads were paid on more attention. Increasing the axle-load was benefit to the adhesive of the high-power locomotives and also to the wheel-rail force. This article analyzed mainly the impact about the changes of axle load, the suspension parameters configuration and the crawl vibration absorber on the dynamic of locomotives. Considering the request of locomotives parameters through the straight line and curve, we could find the better suspension parameters configuration of the locomotive, this provided reference for technical design of high-power locomotives.Firstly, combing the development of the domestic and international status of high-power-locomotives, C0-C0-axis high-power locomotives were selected as the research object. According to the specific structure of high-power locomotives, we used Simpack which was multi-body dynamics software to establish dynamic model of the locomotive. By analyzing the lateral stability of locomotive, we knew that the nonlinear critical speed of the axle-load high-power locomotives were over 220 km/h in the initial parameters, and the installation of crawl vibration absorber could improve significantly non-linear critical speed of the high-power locomotives, so the axle-load high-power locomotives have large improvement for speed.Secondly, the simulation analyzed the stationarity effect that axle-load and suspension parameters acted on high-power-locomotives under120km/h. On the basis, we researched the stationarity of different axle-load high-power locomotives running by 160km/h, and by changing the suspension parameters configuration or installing the crawl vibration absorber, we would improve the stationarity of locomotive to obtain the speed feasibility of the axle-load high-power locomotives.In the conditions of suspension parameters to be resettled or crawl vibration absorber to be installed, we further analyzed the curve performance of the axle-load high-power locomotives. We came to conclude that the curve performance of the axle-load high-power locomotives all could be qualified to meet the requirements both in the new suspension parameter configuration and the installation of crawl vibration absorber. By comprehensive analysis, just from the perspective of lateral stability and smooth performance, the speeds of high-power locomotives about 23 tons,25 tons and 30 tons were all up to 160km/h.