 This paper examined the dynamic behavior of a rail vehicle using both experimental and simulation analysis. It developed mathematical models for rigid flexible and multi-rigid formulations with the car body treated as rigid for the rigid body analysis and as flexible for the flex rigid analysis. These models were then validated through an experiment conducted by the research design and standards organization. The validated model was used to analyze the running comfort and safety of the vehicle with the spurling ride index and derailment coefficient being used to measure these factors. Finally, the impact of flexibility on the vehicle's stability was investigated using both the rigid body dynamics model and experimental data. The results showed that the rigid flexible coupling model was slightly more important than the rigid body model for ride comfort and safety. This article was authored by Cineal Kumar Sharma, Rakesh Chandmalsharma, Yungal Choi, and others. We are article.tv. Links in the description below.