Dynamic Analysis of the Influence of Railway Vehicle Speed on Passenger Ride Comfort When Wheels Undergo Polygonization Defects

The railway transportation system is currently undergoing a significant expansion. As a result, train lines are upgraded, and the technical condition of the rail vehicles that use them is also taken into consideration. However, under certain circumstances, wheels on rail vehicles may sustain damage while in use. Then, depending on the kind and degree of flaws, the profile of the wheels is no longer circular but rather changes. The quality of a passenger's ride comfort is diminished when a rail vehicle with a damaged wheel is in operation. The research considered one type of railway wheel untrueness wheel polygonization and focused on the evaluation of ride comfort for passengers based on results obtained from numerical and dynamic analyses. Simulations and calculations were carried out in numerical and dynamic multibody software. The results show that with increasing vehicle speed, the ride index also increases, which means that at high speeds, the ride comfort will be diminished. Furthermore, it found that the orders of wheel polygonization have an effect on ride comfort. With the increasing order of polygonization, the ride index also increases. According to the findings, this study has a significant impact on the maintenance planning for wheels and rails as well as operation management.