Nowadays, modeling rail vehicles as a multibody in the dynamic simulation of ride comfort with a rigid carbody approach is less relevant—the analysis results are less accurate. The literature review shows that the first vertical bending mode vibration in the flexible carbody coincides with the human sensitivity range according to ISO 2631, in the frequency of 5 to 15 Hz. It can match the vibration from the bogie suspension due to the excitation of track irregularities. This study compares the vibration level in the rigid and flexible car body models when the vehicle travels through a straight track with irregularities. The flexible carbody is modeled using ANSYS software, then simulating the flexible vibration mode of the carbody and then imported to the UM software. The UM software will add components such as bogies, air springs, and traction rods. The results show differences in the vibration level for rigid and flexible carbody. On the flexible carbody model, higher-level vibrations appear in the 9 to 20 Hz frequency range due to the influence of the carbody first vertical bending mode vibration frequency of 13.76 Hz, which is not present in the rigid car body model. Thus, it can be concluded that modeling the carbody flexibility is highly recommended for analyzing the multibody dynamics simulation, especially for ride comfort analysis.
Influence of Carbody Flexibility on Vertical Vibration Level of Rail Vehicle
Advances in Engineering res
International Conference on Science and Technology ; 2024 ; Yogyakarta, Indonesia October 23, 2024 - October 24, 2024
Proceedings of the 10th International Conference on Science and Technology (ICST 2024) ; Kapitel : 52 ; 582-591
01.07.2025
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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